Re: PRO SYSTEMS SV1,,,A WORK OF ART
[Re: hemi-itis]
#649374
03/27/10 10:04 PM
03/27/10 10:04 PM
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Joined: Mar 2008
Posts: 264 Westbury, NY
cowbay
enthusiast
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enthusiast
Joined: Mar 2008
Posts: 264
Westbury, NY
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Quote:
The SV1 utilizes a single venturi with special port layouts and very high cfm ratings that were previously unattainable. Due to its high amounts of signal and shift recovery the SV1 uses 4150 style 2 circuit metering blocks and gaskets. There is no intermediate circuit required to assist in throttle response and shift recovery (like most 1050 cfm and larger four barrels prefer and require).
The unique quadrant tuneable SV1 booster design (which allows your main jetting to effect each quadrant or corner of the carburetor) has an exceptionally low lift point and the throttle shaft and blade does not impede signal generation, so the SV1 offers previously unattainable levels of low speed and shift recovery signal.
As you roll into the throttle on other designs, the throttle blade is in the way of the booster until it gets to wide open throttle. On the SV1, the booster begins receiving signal the moment the blade even begins to open. This offers faster priming of the metering system so the SV1 will jump right up on even the tightest converters. It also gives the SV1 incredibly smooth and very nice driveability. You will be impressed by how nice the design drives and idles.
The amazing idle quality is simply a result of a better layout. You see on four barrel designs, the backside of the blade only allows in "clean air". You really only have an opening at the front and rear of the blades to atomize the idle fuel, the sides of the blades (inline with the shaft), stay snug to the venturi at all times, acting like a divider. But there is another divider. On all four barrel designs, zero or very little fuel can make it to the opposite side of the blade as the throttle shaft acts like a drip rail and (divides) cuts the fuel off from traveling to this "clean air" side. So on four barrel carburetors, only the outside edge of the blade gets fuel. The inside edge towards the center of the body gets no fuel and only passes (or mostly passes) clean air into the engine. So half of the air entering the engine is improperly lean. To compensate, on four barrel carburetors, the fuel port side of the blade must be kept improperly rich to get a good "average".
Clean air is the enemy in an engine as it typically stays clean as it easily travels through the intake in the direction of any cylinder or cylinders it wishes to feed.
On the SV1 the front half AND the rear half of the blade are exposed to fuel delivery ports so there are no "clean air" openings available to bypass these idle fuel ports (so no stray "clean air" streams can occur). On the SV1, every place where air comes into the engine, offers mixture screw controllable atomized fuel (it's also unblocked as there is no throttle shaft divider keeping half of the blade from access to a fuel port). This idle fuel is then drawn around the perimeter of the very large blade and is atomized over this very large surface area and that really improves the idle quality and evens up the distribution.
This much improved idle quality/atomization configuration is very important to Nitrous applications as it keeps your cold nitrous plugs from fouling out, so they stay clean and ready to go. It's great for street and bracket racing/throttle stop cars too.
Another advantage to the single blade design is also obvious. Four barrel carburetor designs require the throttle shaft and blade to be located directly under the center of the booster. This layout impedes the boosters ability to quickly respond to air speed changes. The SV1 uses a booster design that does not rely on a signal generating center (like an annular, aerosol or dog leg booster). So on the SV1, the throttle blade and shaft location are no longer a factor. On the SV1, the whole booster length generates signal and because the blade and shaft are no longer a "signal blocker", when air speed suddenly changes (during a shift or the engagement of nitrous) you get more instant response to these changes and faster shift recovery time as a result. This reduces lean spikes. So you can stand on your nitrous tune up even harder without worry of going lean on the shifts or during nitrous engagement and encountering a loaded nitrous backfire. This also makes the carburetor very consistent for bracket racing and throttle stop type applications as well.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>From the Prosystems web site
It is like you are talking dirty to everyone here on the board along with blowing into our ears
Last edited by cowbay; 03/27/10 10:23 PM.
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Re: PRO SYSTEMS SV1,,,A WORK OF ART
#649379
03/30/10 04:22 PM
03/30/10 04:22 PM
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Joined: Nov 2004
Posts: 2,825 Sk. Canada
RemCharger
master
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master
Joined: Nov 2004
Posts: 2,825
Sk. Canada
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Quote:
I'm not saying it's a bad piece, and it may be better out of the box for the average Joe that doesn't understand carbs, but to say it's got better throttle response than a tuned Dominator is stretching it.....
We can all take stabs in the dark and have a good 50% chance of being right... Myself,,, I'd like to hear somebody that bolted it on, and tried it. And I don't give a turd about idle, Its the whole response and staging and driving around thats important. I believe it could make more horse power, but hows the manners.
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Re: PRO SYSTEMS SV1,,,A WORK OF ART
[Re: RemCharger]
#649380
03/30/10 07:06 PM
03/30/10 07:06 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
We can all take stabs in the dark and have a good 50% chance of being right... Myself,,, I'd like to hear somebody that bolted it on, and tried it. And I don't give a turd about idle, Its the whole response and staging and driving around thats important. I believe it could make more horse power, but hows the manners.
You don't care about idle? You don't care about fouling plugs, but you care about part throttle driveability??? that makes a lot of sense.......
Come to Oklahoma and I'll take you for a ride in my GTS Dart with a Dominator........It fires up at the crank of the key, idles like a kitten, has awesome throttle response, and drives around smoothly like a two barrel.......
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Re: PRO SYSTEMS SV1,,,A WORK OF ART
#649383
03/30/10 10:42 PM
03/30/10 10:42 PM
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Joined: Nov 2004
Posts: 2,825 Sk. Canada
RemCharger
master
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master
Joined: Nov 2004
Posts: 2,825
Sk. Canada
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Quote:
Quote:
We can all take stabs in the dark and have a good 50% chance of being right... Myself,,, I'd like to hear somebody that bolted it on, and tried it. And I don't give a turd about idle, Its the whole response and staging and driving around thats important. I believe it could make more horse power, but hows the manners.
You don't care about idle? You don't care about fouling plugs, but you care about part throttle driveability??? that makes a lot of sense.......
Come to Oklahoma and I'll take you for a ride in my GTS Dart with a Dominator........It fires up at the crank of the key, idles like a kitten, has awesome throttle response, and drives around smoothly like a two barrel.......
Hey, thanks for the invite! I'd like to take you up on the offer, I'm sure It does everything you say and more. And I'm by no means knocking your tuning skills, I don't even know you.
Alls I'm sayin' is this thing might not be a turd. I'd like to see if it is what they say it is. I was trying to talk one of my sponsors into Getting a "demo"
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Re: PRO SYSTEMS SV1,,,A WORK OF ART
[Re: RemCharger]
#649384
03/31/10 10:30 AM
03/31/10 10:30 AM
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Joined: Feb 2005
Posts: 2,528 Mansfield, Tx
Jacob Pitt
master
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master
Joined: Feb 2005
Posts: 2,528
Mansfield, Tx
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I had the chance to try one this past Thanksgiving at a race I traveled too in Abilene. Unfortunatley I didn't get to play with it much. I can tell you that the idle is good, the driving around the pits is very good, and the throttle response is insane! I was -.041 red with it footbraking seeing the last yellow bulb. The testing session was cut short so I had to put my 4500 1050 back on for the actual race. I sent it back to Patrick because I was just a test driver for him. He said he wanted to make some changes to it and send it back. He informed me yesterday that he has been very busy and I should see the sv1 sometime next week or so.
2013 NHRA D4 Stock Champ #4 in the World IHRA Stock 2x IHRA Div.4 Stock Champ 14x Track Champ All using a Ultimate Converter Concepts converter. Call Lenny today 704-892-6837
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Re: PRO SYSTEMS SV1,,,A WORK OF ART
#649386
03/31/10 10:43 AM
03/31/10 10:43 AM
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Joined: Oct 2009
Posts: 91 under a rock
flathood
member
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member
Joined: Oct 2009
Posts: 91
under a rock
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Quote:
Quote:
I thought winter was over, especially in Oklahoma.....
It actually snowed this past Saturday and Sunday, but the track was open today for TNT.....
Quote:
I just spoke with Joe Nova,he bolted the SV1 on his car,,,,,,couldn't wait for me.Set the idle air screws,the floats were right on .The old carb liked an 1100 rpm idle.The SV1 idles at 800 rpm.Rise time real quick,took it for a blast.There is a new problem.The 18 x 33's won't stay stuck gunna have to try the slicks
If it idles at 800 now and was at 1,100 before, that just says he had the wrong carb before and/or didn't know how to tune the one he had.....
I'm not saying it's a bad piece, and it may be better out of the box for the average Joe that doesn't understand carbs, but to say it's got better throttle response than a tuned Dominator is stretching it.....
Quote:
....I guess 2 SV1's will be way too much CFM for my conservitive build
I agree.....9.90's out of a blown Hemi is pretty conservative.......
Wayne
From what I've read about that blown HEMI,it's 13% underdriven with tiny holley 750's and 5 lbs of boost.Sounds more like a conservitive tune up.That combo could make upwards of 1400 hp with a pair of SV1 carbs and some overdrive.
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Re: PRO SYSTEMS SV1,,,A WORK OF ART
#649387
03/31/10 10:58 AM
03/31/10 10:58 AM
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Joined: Jan 2003
Posts: 1,633 Jacksonville, NC
RonP
top fuel
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top fuel
Joined: Jan 2003
Posts: 1,633
Jacksonville, NC
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Quote:
Quote:
We can all take stabs in the dark and have a good 50% chance of being right... Myself,,, I'd like to hear somebody that bolted it on, and tried it. And I don't give a turd about idle, Its the whole response and staging and driving around thats important. I believe it could make more horse power, but hows the manners.
You don't care about idle? You don't care about fouling plugs, but you care about part throttle driveability??? that makes a lot of sense.......
Come to Oklahoma and I'll take you for a ride in my GTS Dart with a Dominator........It fires up at the crank of the key, idles like a kitten, has awesome throttle response, and drives around smoothly like a two barrel.......
Sounds like a good peice but what do I know. I do know that I would love to take you up on that offer if I was closer. I would have to bring my car as well because my dominator doesn't do any of what you listed except run well wide open.
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Re: PRO SYSTEMS SV1,,,A WORK OF ART
[Re: flathood]
#649388
03/31/10 11:26 AM
03/31/10 11:26 AM
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Joined: Jan 2004
Posts: 4,866 North of Detroit
HemiDart68
master
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master
Joined: Jan 2004
Posts: 4,866
North of Detroit
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Quote:
Quote:
Quote:
I thought winter was over, especially in Oklahoma.....
It actually snowed this past Saturday and Sunday, but the track was open today for TNT.....
Quote:
I just spoke with Joe Nova,he bolted the SV1 on his car,,,,,,couldn't wait for me.Set the idle air screws,the floats were right on .The old carb liked an 1100 rpm idle.The SV1 idles at 800 rpm.Rise time real quick,took it for a blast.There is a new problem.The 18 x 33's won't stay stuck gunna have to try the slicks
If it idles at 800 now and was at 1,100 before, that just says he had the wrong carb before and/or didn't know how to tune the one he had.....
I'm not saying it's a bad piece, and it may be better out of the box for the average Joe that doesn't understand carbs, but to say it's got better throttle response than a tuned Dominator is stretching it.....
Quote:
....I guess 2 SV1's will be way too much CFM for my conservitive build
I agree.....9.90's out of a blown Hemi is pretty conservative.......
Wayne
From what I've read about that blown HEMI,it's 13% underdriven with tiny holley 750's and 5 lbs of boost.Sounds more like a conservitive tune up.That combo could make upwards of 1400 hp with a pair of SV1 carbs and some overdrive.
1400 Horse ?? not in a million years. I love how people throw out these huge huge horsepower estimates for roots blower motors. it might make 1400 horsepower with a 1471 blower and alcohol. I have worked around big roots blower motors used in offshore powerboats for a long time. It takes those guys big inch, big cheif head, 1471 intercooled, dominators, race gas, and still not make 1400. I better get on the phone now and start telling those guys not to spend 50 K a motor to make 1100 horse, when all along it only takes a 426 hemi with an 871 and sv1's.
In God we trust, all others pay cash.
www.lightnens.com (Home of the world's fastest Paint Job)
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Post deleted by Defbob
[Re: HemiDart68]
#649389
03/31/10 12:04 PM
03/31/10 12:04 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Re: PRO SYSTEMS SV1,,,A WORK OF ART
[Re: RonP]
#649390
03/31/10 01:26 PM
03/31/10 01:26 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
Sounds like a good peice but what do I know. I do know that I would love to take you up on that offer if I was closer. I would have to bring my car as well because my dominator doesn't do any of what you listed except run well wide open.
My Dominator has been conservatively tuned up by Porter for my combo.......All I had to do was jet it.......
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Re: PRO SYSTEMS SV1,,,A WORK OF ART
[Re: HemiDart68]
#649392
03/31/10 04:32 PM
03/31/10 04:32 PM
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Joined: Jul 2005
Posts: 8,647 ELYRIA,OH
blownzoom440
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Joined: Jul 2005
Posts: 8,647
ELYRIA,OH
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From what I've read about that blown HEMI,it's 13% underdriven with tiny holley 750's and 5 lbs of boost.Sounds more like a conservitive tune up.That combo could make upwards of 1400 hp with a pair of SV1 carbs and some overdrive.
1400 Horse ?? not in a million years. I love how people throw out these huge huge horsepower estimates for roots blower motors. it might make 1400 horsepower with a 1471 blower and alcohol. I have worked around big roots blower motors used in offshore powerboats for a long time. It takes those guys big inch, big cheif head, 1471 intercooled, dominators, race gas, and still not make 1400. I better get on the phone now and start telling those guys not to spend 50 K a motor to make 1100 horse, when all along it only takes a 426 hemi with an 871 and sv1's.
making 1400 for 1 hr is not like making 1400 for 8sec. at a time. you would just call it fake if some1 did make that much i think.do you realy think that 1400hp cant be made with a combo like his? i am not trying to cause trouble just debate a little.
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