04-13-2007, 07:46 PM #1
ported throttle body alternative?
found this site in one magazine at work
check out the throttle body section
FEATURES & INFORMATION
• Increases throttle response, gas mileage, & acceleration
• Installs in just minutes!
• Designed to produce power and torque throughout the RPM range
• A patent-pending design!
• Eliminates the need for a ported throttle-body by smoothing and reshaping the throttle-body entrance to increase the incoming air velocity at each given RPM
The VR velocity stack was designed to reshape the factory throttle-body in order to boost air flow velocity at each given RPM. The overall shape of each VR velocity stack has undergone some of the most intensive airflow research that we have ever done to produce the best overall shape for each engine's airflow requirements. In order to achieve this we: Created a balanced airsteem between the upper and lower portion of the throttle-body blade = more airflow. We then changed the shape of the entrance to build up a higher velocity charge at each given RPM. This allows the intake charge force in the manifold to be increased = increased throttle response and added torque and power under the curve where you can use it. Streamlining the intake was also achieved by directing the air in a controlled fashion to reduce any power robbing turbulence over the AIR and PCV valve to maximize the overall efficiency of the factory throttle-body's overall diameter.Each velocity stack features a varied plenum volume whether in front of the throttle-body or in overall length to help them boost the primary and secondary pressure waves during the cylinder firing process = a tuned and more balanced induction system giving you much better overall combustion efficency = more power and better gas milage.
In Truck applications we have seen gains of up to 22+ ft/lbs of tire-shredding torque throughout the power curve where you can use it! As tested in a 2004 Silverado 5.3 V8. In LS1 car applications, gains of up to 13 rear wheel HP have been seen (03 C5 Corvette).
The all-new VR Velocity Stacks are the solution for the poorly designed GM throttle-bodies. Installation takes just minutes. Increase power output throughout the entire RPM range, improve throttle response and increase gas mileage! Available for all 1997-2004 C5 Corvettes, 1998-2002 LS1 F-Bodies and 1996-2004 GM V8 and V6 Trucks/SUVs.
i wonder what the size difference is
04-13-2007, 08:02 PM #2
Wiring and the efi limits 4 now.. it all makes sense hurry macboost or advent,,,Ross
04-13-2007, 08:18 PM #3
- Join Date
- Apr 2006
- South MS
I had one of those on my Silverado. Saw no gains, its about twice the size of the yamaha throttle bodies. If you look at it, it actually reduces the size of the bore. A ported throttle body alternative would be a set of 48mm carbs
04-13-2007, 08:40 PM #4
thanks ron, that settles that
04-13-2007, 09:23 PM #5
I have used that product before on a 00 LS1. I lost power....
04-13-2007, 09:42 PM #6
To add onto that,
I tried that once. Didn't work. But I did run a Ported SHANER s2 Throttle bodyie. It was basicly what Ross is doing to these on the GPR with out the stack. It gave better throttle response and about 4 or 5 hp.
I tried a bigger manifold and tb setup than stock, LSX 78mm. I saw no gain untill I went ported heads and cam on that setup.
So basicly my theory is
On a GPR stock cubic inch and no porting. Ported stock will be just fine.
Once you go ported bigger throttle bodies and intake system could help make more power.
And also it says they have them for all those different cars... it is all the same throttle body basicly. The throttle body size is 75mm.
04-13-2007, 10:28 PM #7
i still have alot of dialing in with the efi controller but, trying to work out the mystery bounce sh#t figured it out your not suppossed to try and superman in 6 in chop at or near 80 winds everyday 10-15-20 may have to make a road trip and find some of that fine glass over there in Orlando and maybye even jump a few gators
04-13-2007, 11:28 PM #8
If you look at it, it actually reduces the size of the bore. A ported throttle body alternative would be a set of 48mm carbs
Yes, those have BS written all over them... They are selling an increase in velocity by reducing throttle body diameter.. No help there... My setup increases velocity with no reduction in T/B diameter. And dont forget, you are comparing 4 stroke to 2 stroke here... Simply cant do that..
You are right about the 48s Ron but I am wondering what the 48s would be without triple pipes.. Arent they pretty much husband and wife?
04-14-2007, 12:02 PM #9
I am wondering what the 48s would be without triple pipes.
The fastest singlepipe gpr on this site
04-14-2007, 12:08 PM #10
Are you guys talking about 48mm Blackjacks on a single pipe ski?
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