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: 22,696 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: 22,696
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: 22,696 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: 22,696
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: 22,696 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: 22,696
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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