Front Spoilers...
#1438610
05/19/13 07:44 AM
05/19/13 07:44 AM
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Joined: Jan 2003
Posts: 3,575 The Netherlands
BigBlockMopar
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,575
The Netherlands
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So I have been eyeballing some front spoilers used on the smaller Mopars.
The factory (?) style spoilers, I dunno. I can't help but think these are just way too small and narrow to be of much good.
Then there's fellow who made a batch of his own, AAR-type front spoilers. These look very sturdy and durable, but they 'stick' out way too much and too angled to the front imo for to be used on the street. I would think that with dailydriver, if one happens to hit a curb this will really mess up the entire front valance.
All in all, personally, I don't really like the 'look' of these spoilers.
Also, with the 'open' sides of both spoiler-styles, I would think air would just get around them on the sides and maybe even cause even more turbulence.
What does the rest think about this?
Now yesterday, I stumbled on a spoiler-topic on FABO, and a guy showed off his spoiler reproductions from a Volare/Aspen, but mounted on an 70+ A-body this time. I must say I was quite surprised about how well this looked. The spoiler is supposedly a 3-piece unit, and also goes around to the sides up to the front wheelwells.
This spoiler looks low and enclosed enough to be of use, and not high enough so it gets crashed into things on a daily basis.
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Re: Front Spoilers...
[Re: BigBlockMopar]
#1438611
05/19/13 11:41 AM
05/19/13 11:41 AM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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Looks good but I'd like to see it with the car on the ground. It would give a better look at ground clearance.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Front Spoilers...
[Re: Skeptic]
#1438616
05/19/13 07:40 PM
05/19/13 07:40 PM
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Joined: Jan 2003
Posts: 3,575 The Netherlands
BigBlockMopar
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,575
The Netherlands
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The FABO-thread mainly contained talk about someone who 'was going to' make/remake a certain spoiler. But the guy (BHA43) who posted the pics and a link to the Asper/Volare-forum, pointed everyone to this topic later on; http://www.aspenandvolare.com/showthread.php?3283-flairs-amp-such(Recreation and pics of the front-spoiler start appearing from page 10.) Unfortunatly no better pics are shown of this late model A-body spoiler on a early '70s Dart.
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Re: Front Spoilers...
[Re: BigBlockMopar]
#1438617
05/19/13 07:43 PM
05/19/13 07:43 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Any front spoiler with enough ground clearance to live on the street is primarily cosmetic.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Front Spoilers...
[Re: BigBlockMopar]
#1438619
05/19/13 09:03 PM
05/19/13 09:03 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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I would argue that he "performance" cars you are thinking of have the airdam more for cosmetic reasons, to enhance the image, than practical. While the front of the cars today are cleaner, aerodynamically speaking, than our beloved musclecars, they are still subject to consumer whims and expectations.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Front Spoilers...
[Re: Supercuda]
#1438620
05/19/13 10:21 PM
05/19/13 10:21 PM
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Joined: Dec 2003
Posts: 22,695 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,695
Bitopia
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This pic was taken years ago, the concept was the grille was to be blocked off, and only rad air was to enter center opening, and the spoiler was intended to help make that happen plus any other benefits it furnished. For any on track use I intended to extend spoiler with hard rubber lower edge. It was for street and track use.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Front Spoilers...
[Re: jcc]
#1438621
05/19/13 10:22 PM
05/19/13 10:22 PM
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Joined: Dec 2003
Posts: 22,695 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,695
Bitopia
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I saw this at the shopping mall a few years back, I bet it is effective on the street, but.....
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Front Spoilers...
[Re: jcc]
#1438622
05/19/13 10:26 PM
05/19/13 10:26 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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but ....
Not for long, lol.
I like the idea of your "convertible" spoiler. Might be the best of both worlds.
I have a similar idea for my DD, plus blocking off my grille openings, TBD by coolant temps.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Front Spoilers...
[Re: Supercuda]
#1438623
05/19/13 10:28 PM
05/19/13 10:28 PM
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Joined: Jan 2003
Posts: 4,395 The Pale Blue Dot
Skeptic
master
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master
Joined: Jan 2003
Posts: 4,395
The Pale Blue Dot
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Quote:
I would argue that he "performance" cars you are thinking of have the airdam more for cosmetic reasons, to enhance the image, than practical. While the front of the cars today are cleaner, aerodynamically speaking, than our beloved musclecars, they are still subject to consumer whims and expectations.
You are mistaken in that, the air flow is so carefully controlled that some of them will relentlessly overheat if the front spoiler is missing or broken. Even if the cooling fan is on continuously, there is not enough airflow going through the radiator. Some of the more flamboyant packages are aimed at the boy racer crowd, to be sure.
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Re: Front Spoilers...
[Re: topside]
#1438625
05/20/13 02:01 AM
05/20/13 02:01 AM
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Joined: Feb 2011
Posts: 4,302 Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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Here my little lip spoiler from Randy. It is mostly looks,but I like at least something under the front.
Mopar to the bone!!!
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Re: Front Spoilers...
[Re: jcc]
#1438626
05/20/13 03:35 AM
05/20/13 03:35 AM
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Joined: Apr 2012
Posts: 1,235 Phoenix, AZ
Jjs72D
Deep in the closet
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Deep in the closet
Joined: Apr 2012
Posts: 1,235
Phoenix, AZ
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Quote:
I saw this at the shopping mall a few years back, I bet it is effective on the street, but.....
That aluminum setup is funny!!!
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Re: Front Spoilers...
[Re: Jjs72D]
#1438627
05/20/13 09:34 AM
05/20/13 09:34 AM
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Joined: Jan 2003
Posts: 24,562 Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Quote:
I saw this at the shopping mall a few years back, I bet it is effective on the street, but.....
That aluminum setup is funny!!!
looks like it's hiding 2 turbos....
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Re: Front Spoilers...
[Re: Skeptic]
#1438629
05/20/13 02:12 PM
05/20/13 02:12 PM
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Joined: Jan 2010
Posts: 1,442 NW Chicago suburban area
Mopar Mitch
pro stock
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pro stock
Joined: Jan 2010
Posts: 1,442
NW Chicago suburban area
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I like function, I like vintage look, I also am concerned with breakage of the front spoiler. On the street, breakage would be my fault... but on the road course tracks I want function to help for whatever it would be worth -- i'm a "competitor" before I'm a show car guy. Now, I do like the factory split T/A Challenger spoiler on my car because I can slide my floor jack under the front to lift the car (slightly lifting the front bumper just ~1/2 inch to clear the current T/A split spoliers)... and then my jack-handle easily clears between the split front spoiler!!! I feel this is important to me for working on my car, whenever needed. With a full-width solid front spoiler (such as the vintage TRANS AM Cuda spoilers (and maybe eventual Challenger) now available your jack-handle won't work. SO.. I've been thinking of how to make a 3-piece full-width front spoiler whereby the center-section would, perhaps, be flippable (hinged?) with a slight overlap (1-2"?) to each side section.. maybe the center section could be ~12" wide so to allow the floor jack to be pushed under and have the handle able to be used.... function, apperance, and user-friendly.
Mopar Mitch
"Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers!
Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!
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Re: Front Spoilers...
[Re: Skeptic]
#1438634
05/20/13 10:17 PM
05/20/13 10:17 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Quote:
Quote:
I would argue that he "performance" cars you are thinking of have the airdam more for cosmetic reasons, to enhance the image, than practical. While the front of the cars today are cleaner, aerodynamically speaking, than our beloved musclecars, they are still subject to consumer whims and expectations.
You are mistaken in that, the air flow is so carefully controlled that some of them will relentlessly overheat if the front spoiler is missing or broken. Even if the cooling fan is on continuously, there is not enough airflow going through the radiator. Some of the more flamboyant packages are aimed at the boy racer crowd, to be sure.
Then how do they cool at lower road speeds without the airflow that is available at highway speeds?
Got an example of this in production?
I'll grant that the emphasis on clean aerodynamics has reduced grille openings to the minimum possible, but we were talking about aerodynamic improvements not cooling concerns. I still maintain that while an airdam might very well be important for cooling today's cars (not on my DD, it has a pan blocking the chin area) it is still mostly cosmetic from an under car airflow aspect. My DD has an airdam, why? I dunno for looks I guess it is nowhere near close enough to the pavement to be effective in blocking under car airflow in any useful amount and it cannot direct air thru the radiator as it is blocked off above the air dam.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Front Spoilers...
[Re: Supercuda]
#1438635
05/21/13 11:19 AM
05/21/13 11:19 AM
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Joined: Jan 2003
Posts: 4,395 The Pale Blue Dot
Skeptic
master
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master
Joined: Jan 2003
Posts: 4,395
The Pale Blue Dot
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Quote:
Quote:
Quote:
I would argue that he "performance" cars you are thinking of have the airdam more for cosmetic reasons, to enhance the image, than practical. While the front of the cars today are cleaner, aerodynamically speaking, than our beloved musclecars, they are still subject to consumer whims and expectations.
You are mistaken in that, the air flow is so carefully controlled that some of them will relentlessly overheat if the front spoiler is missing or broken. Even if the cooling fan is on continuously, there is not enough airflow going through the radiator. Some of the more flamboyant packages are aimed at the boy racer crowd, to be sure.
Then how do they cool at lower road speeds without the airflow that is available at highway speeds?
Got an example of this in production?
I'll grant that the emphasis on clean aerodynamics has reduced grille openings to the minimum possible, but we were talking about aerodynamic improvements not cooling concerns. I still maintain that while an airdam might very well be important for cooling today's cars (not on my DD, it has a pan blocking the chin area) it is still mostly cosmetic from an under car airflow aspect. My DD has an airdam, why? I dunno for looks I guess it is nowhere near close enough to the pavement to be effective in blocking under car airflow in any useful amount and it cannot direct air thru the radiator as it is blocked off above the air dam.
Highway speed are where they are the worst, all the air is deflected away from the opening, if you look the "grill" area is really tiny in comparison to the gaping maws that older cars have and placed much lower, really out of the airstream. You would like an example....well, I have one. It involves aerodynamics, performance(for it's time) and a comedy of errors. The shop I was working at the time was owned by a Father/Son and the Father had a 3rd gen F-body Trans Am that developed an overheating problem-on the freeway. This car was his pride and joy and used to make high speed runs to Vegas, he had a second home there. He is a mechanic and a damn good one as is his Son, so this would not do. It was a matter of Pride as well as need that it be fixed. After replacing the radiator, fan switch, the cooling fan (including wiring the fan to run all the time)the problem persisted. Next the heads and finally the engine-yes the engine was rebuilt- basically to stock specs..... still the same. After all that, it was noticed that the small lip spoiler was broken. It was a modest thing only a couple of inches long, running under the body just behind the lower valance opening, but replacing it fixed the overheat. Again, as I pointed out in my first post, there are cosmetic aspects to these things, but engineers are driven by the need to control airflow and the Mfgrs spend millions to maximize MPG and any package that gets put on a production car isn't going to cause a significant increase in drag. They can offer them through a "performance division", or just let the aftermarket deal with it. Most of the double wings, body kits and such have nothing to do with the OE and are so poorly built and engineered that they are laughable. As gaudy as the Wing cars are, they have very good Cd numbers and are very stable @ high speed. Take vortex generators, those little triangular looking things that are popping up on the roofs of newer cars, with careful placement and sizing they can reduce drag and increase stability a surprising amount. If you just buy stick on ones and put them anywhere they may do nothing or increase drag. So they are only there for looks if someone decided they would look cool, not if the Aero Engineering team specified where they should be. Ultimately the only way to KNOW if something is truly effective on my/your/anybodies car is to test it. Unless you have access to a supercomputer or a wind tunnel it's more time consuming ie coast-down tests, taping string all over your car and watching/videoing where and how it moves around, using a Magnehelic gauge to measure pressure points, Etc.
Last edited by Skeptic; 05/21/13 11:29 AM.
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Re: Front Spoilers...
[Re: Skeptic]
#1438638
05/22/13 08:48 PM
05/22/13 08:48 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Quote:
Then how do they cool at lower road speeds without the airflow that is available at highway speeds?
Got an example of this in production?
I'll grant that the emphasis on clean aerodynamics has reduced grille openings to the minimum possible, but we were talking about aerodynamic improvements not cooling concerns. I still maintain that while an airdam might very well be important for cooling today's cars (not on my DD, it has a pan blocking the chin area) it is still mostly cosmetic from an under car airflow aspect. My DD has an airdam, why? I dunno for looks I guess it is nowhere near close enough to the pavement to be effective in blocking under car airflow in any useful amount and it cannot direct air thru the radiator as it is blocked off above the air dam.
Highway speed are where they are the worst, all the air is deflected away from the opening, if you look the "grill" area is really tiny in comparison to the gaping maws that older cars have and placed much lower, really out of the airstream. You would like an example....well, I have one. It involves aerodynamics, performance(for it's time) and a comedy of errors. The shop I was working at the time was owned by a Father/Son and the Father had a 3rd gen F-body Trans Am that developed an overheating problem-on the freeway. This car was his pride and joy and used to make high speed runs to Vegas, he had a second home there. He is a mechanic and a damn good one as is his Son, so this would not do. It was a matter of Pride as well as need that it be fixed. After replacing the radiator, fan switch, the cooling fan (including wiring the fan to run all the time)the problem persisted. Next the heads and finally the engine-yes the engine was rebuilt- basically to stock specs..... still the same. After all that, it was noticed that the small lip spoiler was broken. It was a modest thing only a couple of inches long, running under the body just behind the lower valance opening, but replacing it fixed the overheat. Again, as I pointed out in my first post, there are cosmetic aspects to these things, but engineers are driven by the need to control airflow and the Mfgrs spend millions to maximize MPG and any package that gets put on a production car isn't going to cause a significant increase in drag. They can offer them through a "performance division", or just let the aftermarket deal with it. Most of the double wings, body kits and such have nothing to do with the OE and are so poorly built and engineered that they are laughable. As gaudy as the Wing cars are, they have very good Cd numbers and are very stable @ high speed. Take vortex generators, those little triangular looking things that are popping up on the roofs of newer cars, with careful placement and sizing they can reduce drag and increase stability a surprising amount. If you just buy stick on ones and put them anywhere they may do nothing or increase drag. So they are only there for looks if someone decided they would look cool, not if the Aero Engineering team specified where they should be. Ultimately the only way to KNOW if something is truly effective on my/your/anybodies car is to test it. Unless you have access to a supercomputer or a wind tunnel it's more time consuming ie coast-down tests, taping string all over your car and watching/videoing where and how it moves around, using a Magnehelic gauge to measure pressure points, Etc.
Interestingly enough, I saw one of those F bodies on the highway today, reminding me of this thread. Those Firebirds sure did have a tiny grille and I suspect you are 100% correct that it needed a dam to force air into the radiator for cooling at speed.
But that's really a different issue from using a dam to clean up the aerodynamics of the car. The dirtiest part of a car, especially today, is the undercarriage. Which is what an airdam that is extremely close to the ground can help. I see there are a couple of somewhat anecdotal examples posted of add on aero helping at higher (than highway legal mostly) speeds, which was the point of my original comment. My old man had a Buick that would get real floaty in the front end at 100+, adding a GS front spoiler helped at those speeds. But at highway speeds the thing was not needed.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Front Spoilers...
[Re: Supercuda]
#1438639
05/22/13 11:13 PM
05/22/13 11:13 PM
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Joined: Jan 2003
Posts: 20,740 A collage of whims
topside
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 20,740
A collage of whims
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As far as GM F-body cooling: I ran a Chevy body shop for awhile in the '90s, and whenever the lower spoiler (the 2nd one, black, behind the front cover) was broken off from parking curbs, the Camaros would overheat. Unrelated to that, but germaine to this discussion: back at the dawn of time I had a '64 Corvair, which had quite a bit of front-end lift on the freeway. I added a 1st-gen Z28 front spoiler and that problem disappeared with no other changes. I've added front spoilers to a few cars since, and picked up MPG or improved cooling or both, depending on the spoiler placement. The MPG was from guiding the air to the sides rather than having it bouncing off the undercarriage. I've also vented the hood on 3 vehicles of mine through the years, which also picked up MPG & improved airflow through the engine compartment, reducing underhood temps.
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Re: Front Spoilers...
[Re: Supercuda]
#1438640
05/24/13 08:48 AM
05/24/13 08:48 AM
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Joined: Jan 2005
Posts: 4,862 the frozen wastes...
Pale_Roader
Swears too much
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Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
My old man had a Buick that would get real floaty in the front end at 100+, adding a GS front spoiler helped at those speeds. But at highway speeds the thing was not needed.
He should have just jacked up the rear about 8". My 70 Skylark saw 110-120mph regularly and it was stable till about there (at which time the $5 tires got a bit too sketchy to continue). Maybe thats the key to high speed stability...??? Enough rake to see the complete rearend from a truck driving behind it...??? Hahahaha
Oh... and another handydandy Buick aero tip: you need a better than stock rad mounting when going over 110mph in a jacked-up Buick... heh heh heh...
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Re: Front Spoilers...
[Re: Mopar Mitch]
#1438641
05/24/13 08:50 AM
05/24/13 08:50 AM
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Joined: Jan 2005
Posts: 4,862 the frozen wastes...
Pale_Roader
Swears too much
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Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
I like function, I like vintage look, I also am concerned with breakage of the front spoiler. On the street, breakage would be my fault... but on the road course tracks I want function to help for whatever it would be worth -- i'm a "competitor" before I'm a show car guy. Now, I do like the factory split T/A Challenger spoiler on my car because I can slide my floor jack under the front to lift the car (slightly lifting the front bumper just ~1/2 inch to clear the current T/A split spoliers)... and then my jack-handle easily clears between the split front spoiler!!! I feel this is important to me for working on my car, whenever needed. With a full-width solid front spoiler (such as the vintage TRANS AM Cuda spoilers (and maybe eventual Challenger) now available your jack-handle won't work. SO.. I've been thinking of how to make a 3-piece full-width front spoiler whereby the center-section would, perhaps, be flippable (hinged?) with a slight overlap (1-2"?) to each side section.. maybe the center section could be ~12" wide so to allow the floor jack to be pushed under and have the handle able to be used.... function, apperance, and user-friendly.
I had in mind building a T/A style/sized front spoiler for my Challenger, but one full piece across (basically connecting the two halves), maybe a tad larger, and out ov aluminum. I didn't even think about having to jack the car up. Back to the drawing board...
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Re: Front Spoilers...
[Re: Supercuda]
#1438644
05/26/13 07:02 AM
05/26/13 07:02 AM
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Joined: Jan 2005
Posts: 4,862 the frozen wastes...
Pale_Roader
Swears too much
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Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
Quote:
Quote:
My old man had a Buick that would get real floaty in the front end at 100+, adding a GS front spoiler helped at those speeds. But at highway speeds the thing was not needed.
He should have just jacked up the rear about 8". My 70 Skylark saw 110-120mph regularly and it was stable till about there (at which time the $5 tires got a bit too sketchy to continue). Maybe thats the key to high speed stability...??? Enough rake to see the complete rearend from a truck driving behind it...??? Hahahaha
Oh... and another handydandy Buick aero tip: you need a better than stock rad mounting when going over 110mph in a jacked-up Buick... heh heh heh...
Ever notice how today's vehicles, especially trucks have a nose down rake to them? Same reasoning, cheap way to clean up the undercar airflow some.
Uh... yyyyeeeaahh.... that was my intention totally. I was so far ahead ov my time... hahahahahahahahahahahahaha
As for these Camaro spoilers... are these the same cheap looking plastic things you see in Classic Industries catalogs? I've handled them and they never struck me as strong enough to withstand any ACTUAL force... more just an aesthetic item. Even the Mopar factory stuff seems flimsy to me. I wouldn't want something giving my valuable downforce blowing off on me at well over 100mph...
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Re: Front Spoilers...
[Re: Pale_Roader]
#1438645
05/26/13 09:43 AM
05/26/13 09:43 AM
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Joined: Feb 2011
Posts: 4,302 Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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Mine is fiberglass and has withstood 130 mph without fail. I would test it further but I either run out of road or testicle before hand. The car doesn't get light at all just vibration gets a little scary.
Mopar to the bone!!!
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Re: Front Spoilers...
[Re: Supercuda]
#1438647
05/26/13 04:48 PM
05/26/13 04:48 PM
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Joined: Jan 2003
Posts: 3,575 The Netherlands
BigBlockMopar
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,575
The Netherlands
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Quote:
Ever notice how today's vehicles, especially trucks have a nose down rake to them? Same reasoning, cheap way to clean up the undercar airflow some.
Isn't this more to counter possible cargoweight in the back? I just did a Google image-search with "pickup truck" and save for a 2-3 images, I hardly see any rake in the shown pickups.
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Re: Front Spoilers...
[Re: BigBlockMopar]
#1438648
05/26/13 05:38 PM
05/26/13 05:38 PM
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Joined: Jan 2003
Posts: 104,346 Garden Grove, CA
OzHemi
Penguin-hating Ginger
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Penguin-hating Ginger
Joined: Jan 2003
Posts: 104,346
Garden Grove, CA
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Quote:
Quote:
Ever notice how today's vehicles, especially trucks have a nose down rake to them? Same reasoning, cheap way to clean up the undercar airflow some.
Isn't this more to counter possible cargoweight in the back? I just did a Google image-search with "pickup truck" and save for a 2-3 images, I hardly see any rake in the shown pickups.
Even with a pallet of wheel outers in the back of my truck, you can still see the front down rake to it. (all stock 2011 Chevy)
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Re: Front Spoilers...
[Re: OzHemi]
#1438649
05/26/13 06:08 PM
05/26/13 06:08 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Well, my 05 Ram, my 08 Silverado, the various newer work trucks I've had all have it in person.
that's why the make leveling kits so old schooler's can lift the front end and make it sit level.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Front Spoilers...
[Re: Lefty]
#1438651
05/26/13 09:36 PM
05/26/13 09:36 PM
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Joined: Dec 2003
Posts: 22,695 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,695
Bitopia
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Quote:
jcc - nice work. Mind telling me what the bottom spoiler is adapted from? I have been going to use a 80's Ranger truck lower fascia as a buck to make a fiberglass mold from for my 66 Coronet, but yours looks like it's made from fiberglass?
Sorry about the big pic, don't know why it blows up like that using "properties" from the Moparts pic info...
I think I hear laughter in the background, but I don't remember, it has been a few years, and your are absolutely correct in that it is "adapted", if you look close, you can see 2 small eyebrow reliefs I had to fill in on the spoiler, maybe that will jog someones memory on what car I got from. Sorry guys. Please post if anybody knows, since I am certain I am going mangle it in my first big off track excursion, under braking
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Front Spoilers...
[Re: Supercuda]
#1438652
05/27/13 11:49 AM
05/27/13 11:49 AM
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Joined: Jan 2003
Posts: 5,387 Pikes Peak Country
TC@HP2
master
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master
Joined: Jan 2003
Posts: 5,387
Pikes Peak Country
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Quote:
Ever notice how today's vehicles, especially trucks have a nose down rake to them? Same reasoning, cheap way to clean up the undercar airflow some.
I wouldn't necessarily consider a truck an accurate comparison considering they are designed to be carry a half ton load, at a minimum, and have rake for a differing reason than a car might use rake.
In any case, some of us old schoolers discovered the positive attributes of a 2-3* nose down rake back in about 1968 when mopar began teaching it on their Super Car Clinics and then later when it was published in the chassis manual.
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Re: Front Spoilers...
[Re: TC@HP2]
#1438653
05/29/13 12:16 AM
05/29/13 12:16 AM
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Joined: Jan 2003
Posts: 3,031 Erda, UT
67Charger
master
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master
Joined: Jan 2003
Posts: 3,031
Erda, UT
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Mine... 5" wide strips of 18ga. steel bolted to aluminum angle attached to the flat flange under the bumper and fenders. Really stuck this thing down at 140+.
11.33 @ 118.46 on motor 10.75 @ 125.35 w/ a little spray Now, high Speed Open Road Racing - Silver State Classic Challenge, Nevada Open Road Challenge, Big Bend Open Road Race Rocky Mountain Race Week 2020, 2022 2.0, Sick Week 2023
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Re: Front Spoilers...
[Re: jcc]
#1438658
05/29/13 12:37 PM
05/29/13 12:37 PM
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Joined: Jan 2003
Posts: 28,067 Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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Quote:
Quote:
Mine... 5" wide strips of 18ga. steel bolted to aluminum angle attached to the flat flange under the bumper and fenders. Really stuck this thing down at 140+.
Wonder if you noticed any "drag" increase, since you are running a "limited" class, I guess the only way to really tell in the field would be a coast down test. Every areo trick has a downside, just wondering how much in your case, and would agree whatever it was, its worth it.
jcc, take your critical crap elsewhere.
The user stated that he liked the result at 140+ mph. If that makes him happy it doesn't matter what the coast down is. He needed to limit air flow under the car at speed. He got it.
Now, kindly go away.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind. - Stu Harmon
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Re: Front Spoilers...
[Re: feets]
#1438659
05/29/13 12:46 PM
05/29/13 12:46 PM
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Joined: Dec 2003
Posts: 22,695 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,695
Bitopia
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Quote:
Quote:
Quote:
Mine... 5" wide strips of 18ga. steel bolted to aluminum angle attached to the flat flange under the bumper and fenders. Really stuck this thing down at 140+.
Wonder if you noticed any "drag" increase, since you are running a "limited" class, I guess the only way to really tell in the field would be a coast down test. Every areo trick has a downside, just wondering how much in your case, and would agree whatever it was, its worth it.
jcc, take your critical crap elsewhere.
The user stated that he liked the result at 140+ mph. If that makes him happy it doesn't matter what the coast down is. He needed to limit air flow under the car at speed. He got it.
Now, kindly go away.
I'm pretty sure the OP can speak for himself.
Getting a little obsessed are we, or sorry, is that question hitting a little close to home?
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Front Spoilers...
[Re: Lucky Dart]
#1438664
05/30/13 09:29 AM
05/30/13 09:29 AM
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Joined: Jan 2003
Posts: 3,031 Erda, UT
67Charger
master
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master
Joined: Jan 2003
Posts: 3,031
Erda, UT
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Clay,
Here's a ground level shot of your car and spoiler as compared to what everyone else was running.
11.33 @ 118.46 on motor 10.75 @ 125.35 w/ a little spray Now, high Speed Open Road Racing - Silver State Classic Challenge, Nevada Open Road Challenge, Big Bend Open Road Race Rocky Mountain Race Week 2020, 2022 2.0, Sick Week 2023
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Re: Front Spoilers...
[Re: BigBlockMopar]
#1438665
05/30/13 12:58 PM
05/30/13 12:58 PM
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Joined: Jan 2003
Posts: 10,030 Wisconsin
Aero426
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,030
Wisconsin
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Quote:
Did you also mount the tiny trunklip-spoiler that they also used on the Nascar-models (to counter backend lift I recall)?
Running fast in a straight line, the car may do OK. The rear lift problem did not show until they got to Daytona with the tighter corners. When they did their pre-season testing at the huge Goodyear oval in San Angelo TX, the car handled well without the spoiler. The turns were such a large radius that the problem had not yet become apparent.
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Re: Front Spoilers...
[Re: Aero426]
#1438667
05/30/13 10:50 PM
05/30/13 10:50 PM
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Joined: Nov 2008
Posts: 1,491 Lethbridge, AB, Canada
dangina
pro stock
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pro stock
Joined: Nov 2008
Posts: 1,491
Lethbridge, AB, Canada
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Quote:
Quote:
Did you also mount the tiny trunklip-spoiler that they also used on the Nascar-models (to counter backend lift I recall)?
Running fast in a straight line, the car may do OK. The rear lift problem did not show until they got to Daytona with the tighter corners. When they did their pre-season testing at the huge Goodyear oval in San Angelo TX, the car handled well without the spoiler. The turns were such a large radius that the problem had not yet become apparent.
Interesting, which is why i went with this - I wanted more function than looks - its a 67 camaro rear spoiler and would have been a perfect fit if it was about 1 1/2" - 2" longer
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Re: Front Spoilers...
[Re: dangina]
#1438669
05/31/13 11:30 AM
05/31/13 11:30 AM
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Joined: Jan 2003
Posts: 104,346 Garden Grove, CA
OzHemi
Penguin-hating Ginger
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Penguin-hating Ginger
Joined: Jan 2003
Posts: 104,346
Garden Grove, CA
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Quote:
Interesting, which is why i went with this - I wanted more function than looks - its a 67 camaro rear spoiler and would have been a perfect fit if it was about 1 1/2" - 2" longer
If you were looking for more width, a '69 Camaro spoiler is wider than a '67/8 one, incase you didn't know..
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Re: Front Spoilers...
[Re: Duner]
#1438674
05/31/13 10:22 PM
05/31/13 10:22 PM
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Joined: Feb 2011
Posts: 4,302 Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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Last edited by 72Swinger; 05/31/13 10:24 PM.
Mopar to the bone!!!
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Re: Front Spoilers...
[Re: OzHemi]
#1438675
05/31/13 10:35 PM
05/31/13 10:35 PM
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Joined: Nov 2008
Posts: 1,491 Lethbridge, AB, Canada
dangina
pro stock
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pro stock
Joined: Nov 2008
Posts: 1,491
Lethbridge, AB, Canada
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Quote:
Quote:
Interesting, which is why i went with this - I wanted more function than looks - its a 67 camaro rear spoiler and would have been a perfect fit if it was about 1 1/2" - 2" longer
If you were looking for more width, a '69 Camaro spoiler is wider than a '67/8 one, incase you didn't know..
really? I did not know this - thanks for the info
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Re: Front Spoilers...
[Re: BigBlockMopar]
#1438676
06/01/13 08:49 PM
06/01/13 08:49 PM
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Joined: Dec 2003
Posts: 22,695 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,695
Bitopia
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Quote:
I was looking for some windtunnel-testing videoclips of front and rearspoilers and such, when I stumbled on a number of interesting articles on Autospeed.com about spoiler and improving 'under car' airflow;
Part 1 http://www.autospeed.com/cms/A_2455/article.html
Part 2 http://www.autospeed.com/cms/A_2456/article.html
Earlier articles:
http://www.autospeed.com/cms/article.html?&A=109937
And...
Undertrays, Spoilers & Bonnet Vents, Part 1 http://www.autospeed.com/cms/A_2159/article.html
Undertrays, Spoilers & Bonnet Vents, Part 2 http://www.autospeed.com/cms/A_2160/article.html?popularArticle
Those are useful articles, thanks for posting, my biggest takeaway, without any testing, little can be learned, as aero "common sense" is still largely black magic, IMO.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Front Spoilers...
[Re: jcc]
#1438677
06/01/13 09:33 PM
06/01/13 09:33 PM
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Joined: Dec 2003
Posts: 22,695 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,695
Bitopia
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In the 4th link BigBlock posted it refers to a air pressure differential gauge magnehelic, that seems useful for us backyard aero wannabes. They seem readily available and in the under $125 range. Anybody have any real world experience with these gauges? Like, wouldn't a -2.5 to +2.5" of water be a better choice? Is That enough range? How sensitive are readings to how pressure tube opening is oriented? Where on a car is the reference pressure obtained? Inside the car would seem rather variable, by speed, windows up or down, defroster on off, etc Is an analog better then the slightly more costly digital gauge? This is the page that caught me eye. http://www.dwyer-inst.com/Product/Pressure/DifferentialPressure/Gages/SeriesDM-1000/Ordering
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Front Spoilers...
[Re: Skeptic]
#1438679
06/03/13 06:44 AM
06/03/13 06:44 AM
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Joined: Jan 2003
Posts: 3,575 The Netherlands
BigBlockMopar
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,575
The Netherlands
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I 'thought' was able to cheaply fab up a front spoiler for my Dart. Just for kicks, but I found I got my butt kicked by 'geometry' here a bit in the progress. I went to our local HomeDepot and grabbed a nice large cement bucket. These things here are made of very sturdy, but unbreakable plastic. Perfect for possible groundscraping once in a while I thought. Once in the garage I started cutting the reinforced top edge and 4-5" down off it. Also made pie-cuts in the lip to straighten out the curvature. But then I hit a geometric snag. Because of the taper of the bucket, the now 'straightened out' strip, was still curved along it's entire length when flattened out... Duh... Also the curvature was the wrongway around for it to even remotely fit. So I cut another strip, but this time from the bottom of the bucket and did a mockup on the car. Secured it with the center valance-bolt in the middle and a number of tie-raps towards the edges. Not happy about how quickly the strip curves upwards behind the valance, I'm now looking for a 'real' spoiler. Usually, my first attempt at making something from scratch is pretty much shoddy at best, so with that knowledge I always have better hopes for the second attempt...!
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Re: Front Spoilers...
[Re: BigBlockMopar]
#1438680
06/03/13 03:11 PM
06/03/13 03:11 PM
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Joined: Nov 2008
Posts: 1,491 Lethbridge, AB, Canada
dangina
pro stock
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pro stock
Joined: Nov 2008
Posts: 1,491
Lethbridge, AB, Canada
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Quote:
I 'thought' was able to cheaply fab up a front spoiler for my Dart. Just for kicks, but I found I got my butt kicked by 'geometry' here a bit in the progress.
I went to our local HomeDepot and grabbed a nice large cement bucket. These things here are made of very sturdy, but unbreakable plastic. Perfect for possible groundscraping once in a while I thought.
Once in the garage I started cutting the reinforced top edge and 4-5" down off it. Also made pie-cuts in the lip to straighten out the curvature. But then I hit a geometric snag. Because of the taper of the bucket, the now 'straightened out' strip, was still curved along it's entire length when flattened out... Duh... Also the curvature was the wrongway around for it to even remotely fit. So I cut another strip, but this time from the bottom of the bucket and did a mockup on the car. Secured it with the center valance-bolt in the middle and a number of tie-raps towards the edges. Not happy about how quickly the strip curves upwards behind the valance, I'm now looking for a 'real' spoiler.
Usually, my first attempt at making something from scratch is pretty much shoddy at best, so with that knowledge I always have better hopes for the second attempt...!
I think I'm more blown away at the fact they have a home depot in the netherlands!
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Re: Front Spoilers...
[Re: dangina]
#1438681
06/03/13 06:05 PM
06/03/13 06:05 PM
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Joined: Jan 2003
Posts: 3,575 The Netherlands
BigBlockMopar
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,575
The Netherlands
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No we don't, that's why I said 'our local' HD. Had I said 'Gamma' or 'Karwei', as these shops are named here, no-one would have known what I was talking about. I think I've located a suitable spoiler. Will probably be able to pick it up this saturday. It's a brand new spoiler, for an '81 Mercedes. My guess is it will be very close in size to the Dart's width.
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Re: Front Spoilers...
[Re: dangina]
#1438682
06/04/13 08:13 PM
06/04/13 08:13 PM
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Joined: Jan 2005
Posts: 4,862 the frozen wastes...
Pale_Roader
Swears too much
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Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
Interesting, which is why i went with this - I wanted more function than looks - its a 67 camaro rear spoiler and would have been a perfect fit if it was about 1 1/2" - 2" longer
If you want to get tricky and spend a bit more money, why not get two, and fab a longer one from both?
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Re: Front Spoilers...
[Re: BigBlockMopar]
#1438683
06/04/13 09:09 PM
06/04/13 09:09 PM
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Joined: Jan 2003
Posts: 4,395 The Pale Blue Dot
Skeptic
master
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master
Joined: Jan 2003
Posts: 4,395
The Pale Blue Dot
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Quote:
No we don't, that's why I said 'our local' HD. Had I said 'Gamma' or 'Karwei', as these shops are named here, no-one would have known what I was talking about.
I think I've located a suitable spoiler. Will probably be able to pick it up this saturday. It's a brand new spoiler, for an '81 Mercedes. My guess is it will be very close in size to the Dart's width.
What is the model of Benz, or part number?
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Re: Front Spoilers...
[Re: Pale_Roader]
#1438686
06/06/13 03:51 PM
06/06/13 03:51 PM
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Joined: Nov 2008
Posts: 1,491 Lethbridge, AB, Canada
dangina
pro stock
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pro stock
Joined: Nov 2008
Posts: 1,491
Lethbridge, AB, Canada
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Quote:
Quote:
Interesting, which is why i went with this - I wanted more function than looks - its a 67 camaro rear spoiler and would have been a perfect fit if it was about 1 1/2" - 2" longer
If you want to get tricky and spend a bit more money, why not get two, and fab a longer one from both?
just found out from the camaro guys that the 69 is about 1 1/2" longer and same bolt pattern, so I'm gonna pick one up, I'd rather buy something off the shelf than to modify one, that way if something happened to it, I can just buy another one!
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Re: Front Spoilers...
[Re: BigBlockMopar]
#1438689
06/09/13 09:45 PM
06/09/13 09:45 PM
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Joined: Dec 2003
Posts: 22,695 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,695
Bitopia
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I like it, nice adaption, would it maybe be easier to modify a cheap run of the mill fiberglass lower valance to fit the plastic spoiler, rather then the other way around, and maybe have a better aero solution as a result?
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Front Spoilers...
[Re: Skeptic]
#1438691
06/10/13 11:06 AM
06/10/13 11:06 AM
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Joined: Dec 2003
Posts: 22,695 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,695
Bitopia
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I vote please post any propane comments.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Front Spoilers...
[Re: Skeptic]
#1438692
06/10/13 04:22 PM
06/10/13 04:22 PM
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Joined: Jan 2003
Posts: 3,575 The Netherlands
BigBlockMopar
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,575
The Netherlands
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The manual that came with the spoiler was printed in '78, the spoiler itself is a few years newer for an '81 Mercedes, so I doubth they still make these. I don't want to 'spoil' the topic too much with offtopic stuff but the propane-system in my car isn't anything special. Here's an older topic where I listed some of the parts that are used in these systems; https://board.moparts.org/ubbthreads/show...rt=all&vc=1One of the drawbacks of a propane system could be the heavy tank-weight which being put in the back of the car usually. My car has 2 of these tanks for some added range but it sure changes the front/rear weightdistribution of the car.
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Re: Front Spoilers...
[Re: Lefty]
#1438704
06/25/13 04:42 AM
06/25/13 04:42 AM
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Joined: Jan 2003
Posts: 3,575 The Netherlands
BigBlockMopar
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,575
The Netherlands
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Pricing looks mature aswell I haven't done much with my own spoiler yet other than trim some of the top-sides and do some mocking up. But I have to do some more trimming before the spoiler can actually be positioned in a better location under the car. I noticed on certain speedbumps here in town, my current 'McGyver' spoiler was hitting the road occassionaly. Looking closer under the car revealed the reason for that.. it seemed the pass.side LCA bumpstop has finally given up and bailed the car which gives slightly more suspension travel now... I'm looking to get 1" Torsionbars from JustSuspension to stiffen up the front end a bit more and will look into making a 'substitute' bumpstop by fabbing two adjacent pieces of heathose of something, mounted to the LCA.
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Re: Front Spoilers...
[Re: BigBlockMopar]
#1438705
06/26/13 08:40 PM
06/26/13 08:40 PM
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Joined: Sep 2005
Posts: 6,516 Santa Cruz, California
Lefty
master
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master
Joined: Sep 2005
Posts: 6,516
Santa Cruz, California
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Quote:
I'm looking to get 1" Torsionbars from JustSuspension to stiffen up the front end a bit more and will look into making a 'substitute' bumpstop by fabbing two adjacent pieces of heathose of something, mounted to the LCA.
1" bars will sharpen the turn in and maybe corner speed. On the other hand they may be too stiff for an A Body and cause understeer. They will for sure help the high speed stuff.
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Re: Front Spoilers...
[Re: BigBlockMopar]
#1438709
06/27/13 11:49 AM
06/27/13 11:49 AM
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Joined: Jan 2010
Posts: 1,442 NW Chicago suburban area
Mopar Mitch
pro stock
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pro stock
Joined: Jan 2010
Posts: 1,442
NW Chicago suburban area
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BBMopar -- What is your car/body? I assume you have a BB engine? BB cars need more stiffness to prevent dive, as well as lift and lean... you will ultimately use the sway bars to "tune" the ride, and choice of wheel/tire sizes and final "street" air pressure. You've mentioned interest in getting 1" TBs, but you will find the difference to be barely noticable... consider something a little stiffer (for hard street driving as you've suggested).. don't be afraid of TBs of 1.06, 1.10, 1.12... you wil NOT regret it and ultimately be pleased with the improvement for handling.. but it is a "package".. step up the stiffness of the rear springs/leafs as well, and get some good quality shocks. Oh.. about the spoilers... using stiffer TBs will, again, prevent that dive that you're concerned about... consider 1.06, 1.1, 1.12.. especially if you have a BB engine. (I have competition 1.24 TBs.. driving on the street is OK with 60-series tires.. hwy driving is fantastic... mount my 16x10 race rime/tires for competition autox and road course usage.. again.. fantastic!)
Mopar Mitch
"Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers!
Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!
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Re: Front Spoilers...
[Re: BigBlockMopar]
#1438712
06/27/13 03:22 PM
06/27/13 03:22 PM
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Joined: Jan 2010
Posts: 1,442 NW Chicago suburban area
Mopar Mitch
pro stock
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pro stock
Joined: Jan 2010
Posts: 1,442
NW Chicago suburban area
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OK... s/b a-body... good start being lighter overall weight. The 1" TBs would be better noticable, but I'd still suggest a little stiffer.. maybe 1.06.. 1.108.. 1.10. sounds like a long-term project with lots of fun rewards!
Mopar Mitch
"Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers!
Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!
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Re: Front Spoilers...
[Re: BigBlockMopar]
#2171014
10/09/16 05:58 PM
10/09/16 05:58 PM
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Joined: Jan 2003
Posts: 3,575 The Netherlands
BigBlockMopar
OP
master
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OP
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Joined: Jan 2003
Posts: 3,575
The Netherlands
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Topic-revival: I finally mounted the front spoiler on my daily driven '73 Dart; The sides of the spoiler were cut and modelled to fit the contours of the valance and front fender better. Currently it's mounted with 6 bolts. Used 2 existing holes in the lower valance. Might want to add 2 more in the valance. For the time being I'm OK with the looks.
Last edited by BigBlockMopar; 04/17/18 07:02 PM. Reason: Fixed images
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Re: Front Spoilers...
[Re: BigBlockMopar]
#2171128
10/09/16 09:40 PM
10/09/16 09:40 PM
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Joined: Dec 2003
Posts: 22,695 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,695
Bitopia
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Topic-revival:
For the time being I'm OK with the looks.
I think it looks nice The problem to be most effective they often don't look nice. I bet there is worthwhile DF, to be gained if you want by simply pop riveting(?) on a plastic/rubber 2'? vertical piece to the lower spoiler lip, just soft enough to handle a high parking curb, but still stiff enough for high speed jaunts.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Front Spoilers...
[Re: BigBlockMopar]
#2171669
10/10/16 08:34 PM
10/10/16 08:34 PM
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Joined: Sep 2008
Posts: 656 Florida
CJD AUTOMOTIVE
mopar
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mopar
Joined: Sep 2008
Posts: 656
Florida
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I'll throw in my $02. I see some forward angled spoilers in the thread, behind the rear bumper. This is probably worse than no spoiler. The air pressure collects where the spoiler meets the bumper and actually pushes the bumper up, creating front lift (upside down splitter). The front valance needs to be vertical or angled slightly back with a flat splitter lip perpendicular to the road surface or raked slightly forward. The air hitting the valance will push down on the splitter lip instead of up on the bumper. The pic above shows the valence portion angled slightly back and a lip at the bottom to create downforce, but the huge hole in the middle pretty much negates any effect. The air is entering the engine compartment, pushing up on the hood, creating lift, or exiting under the car, again creating lift and horrible turbulence.
These old muscle cars have horrible frontal area, but fantastically huge, flat hoods. Combined with the windshield rake, this is an opportunity for BIG downforce. Think of the the hood as a flat trunk and the windshield as the spoiler. Lots of surface area. There are huge gains to be made simply managing the airflow coming into the the engine compartment and under the car. That is where you will see the biggest dividends from any frontal aero work.
Craig Scholl CJD Automotive, LLC Jacksonville, FL www.CJDAUTOMOTIVE.com904-400-1802 "I own a Mopar. I already know it won't be in stock, won't ship tomorrow, and won't fit without modification"
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Re: Front Spoilers...
[Re: CJD AUTOMOTIVE]
#2172437
10/11/16 08:57 PM
10/11/16 08:57 PM
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Joined: Dec 2003
Posts: 22,695 Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,695
Bitopia
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I think your comment needs some more discussion before we move on. What stands out to me: 1. I agree that the positive intent of the spoiler can often be negated by other features, sometimes not always first apparent. 2. In the OP's case, any air the pictured spoiler redirects, has to restrict an certain amount of under car air flow, that is a plus. 3. Some of the redirected air, but not all of this redirected air will find a path into engine compartment. 4. There are two main reasons for that, the pressure in front will be higher, and the pressure behind will now be lower, because of the under car airflow has been restricted by this spoiler. 5. It is not difficult to restrict this now higher pressure area entering engine compartment in the front, by adding simple well designed blockage, but still retaining adequate airflow for cooling. 6. The high pressure air that now has been restricted thru the radiator, has three other pathways available, back under the car, least likely, around the sides, and over the hood. 7. In the last example above, and IMO, often the most likely path, the high pressure in front will exert pressure on the underside ( and topside) of any non vertical surfaces, like the bumper ( which in the OP's car really is not a large horizontal area, as bumpers go) 8. However, this high pressure area will also exert an almost equal downforce in the same bumper from the top, showing no real change in DF from this bumper issue. 9. The real gain in DF will be from any additional flow over the hood as noted, and any reduction also found in under hood pressure. Other then that we agree. This is my solution in a similar car pic #73, note in this pic the upper grille is completely block with lexan, the brake ducks have not been enlarged, and the spoiler has separate end vanes, and with short rubber extension for streetability as I noted earlier. https://board.moparts.org/ubbthreads/ubbt...tml#Post1553895EDir #2 I made to clarify my response, Craig's issue with underbumper air build negating DF certainly has merit, and is as he mentions, difficult to overcome with our older bumper set-ups
Last edited by jcc; 10/16/16 01:40 PM.
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Front Spoilers...
[Re: BigBlockMopar]
#2172572
10/11/16 11:59 PM
10/11/16 11:59 PM
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Joined: Feb 2011
Posts: 4,302 Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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Ive thought about how to implement a diffuser to the rear of my car. But nothing passes the taste test. Its stable as all get out up to 150, havent stayed in it past that.
Mopar to the bone!!!
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Re: Front Spoilers...
[Re: dangina]
#2172607
10/12/16 12:36 AM
10/12/16 12:36 AM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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has anyone experimented with vortex generators on our cars like they use on evos to funnel the air towards the rear, doesn't look pretty but has always been a thought Having been involved in a project to put these on wind turbine blades I will say this, without a wind tunnel to test and optimize them you are wasting your time.
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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Re: Front Spoilers...
[Re: BigBlockMopar]
#2483813
04/16/18 08:25 PM
04/16/18 08:25 PM
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Joined: Jan 2003
Posts: 3,575 The Netherlands
BigBlockMopar
OP
master
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OP
master
Joined: Jan 2003
Posts: 3,575
The Netherlands
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Major UPDATE!!!! ...not Added a small lip on the front spoiler to extend it a tiny bit further down. Problem is, I thought the lip I ordered was a bit more sturdy, but it's just a foam-type rubber lip, so it will probably simply fold over and won't do much on higher speeds. But for the looks I don't think it hurts much Whenever I find myself a better piece of ABS plastic or rubber, I will replace it with the current lip;
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