Gains of throttle body porting vs 92-102mm???

[Smkymts]

I need some advice. I have heard a lot of talk about porting throttle bodies and aftermarket TBs. But unable to find direct comparisons of stock Vs Ported stock, stock vs. 92mm vs. 102mm.
Can anyone share Dyno charts or numbers on stock, Ported, 92mm, 102mm on a Supercharged 6.2l LS3?
As a novice, are we talking just the valve/gate opening or actually increasing the TB assembly size?
Bottom line, what Hp gain would I find on LS3 maggie if I had the TB Ported, or swap in a 92mm or a 102mm?

[Ray@RDS]

The 90mm is a huge restriction! at least for me! 7.0 TVS2300 maggie application, i have a 102mm TPIS throttle body being added to my set-up.

[AngelSpeedFreak]

this is probably a very dumb question but.... with a 102mm TB, do you need a different intake tube or will any stock/ aftermarket CIA work?

[Hendrix-Engineering]

Originally Posted by Smkymts

I need some advice. I have heard a lot of talk about porting throttle bodies and aftermarket TBs. But unable to find direct comparisons of stock Vs Ported stock, stock vs. 92mm vs. 102mm.
Can anyone share Dyno charts or numbers on stock, Ported, 92mm, 102mm on a Supercharged 6.2l LS3?
As a novice, are we talking just the valve/gate opening or actually increasing the TB assembly size?
Bottom line, what Hp gain would I find on LS3 maggie if I had the TB Ported, or swap in a 92mm or a 102mm?

If i was going to make a change i would do our 102 or leave it stock,anything else wouldnt be worth the money imo.Its really simple to put a vacume guage on your snout,if you have vacume you have a restriction,and your losing power.Ive never seen less than 20 rwhp gain with our TBs and ive seen as much as 80 rwhp.the more power you make the more it will add hp.

[Hendrix-Engineering]

Originally Posted by AngelSpeedFreak

this is probably a very dumb question but.... with a 102mm TB, do you need a different intake tube or will any stock/ aftermarket CIA work?

You can hook our 102 to any intake,but you need a great intake as well to get max hp,we are starting to address that issue after t day.We will have a carbon fiber PowerChamber for the camaro very soon,and maybe a twin 90mm tb setup

[Ray@RDS]

I agree with hendrix! i have seen almost 3" of vacuum directly behind the tb on a 427 tvs 2300 on the engine dyno. bigger is better for me! I NEED the 102!

[Padre]

Thomas, when you say "our TB" is it a NW or other brand, or yours? Just curious. I've got a NW 102 ready for my Procharger build with a FAST 102 LSR manifold. I'm a believer in doing both, though many repeat, "oh the 90mm is fine, it isn't a restriction." I'm thinking my D1 is going to love both.

Padre

[Hendrix-Engineering]

Originally Posted by Padre

Thomas, when you say "our TB" is it a NW or other brand, or yours? Just curious. I've got a NW 102 ready for my Procharger build with a FAST 102 LSR manifold. I'm a believer in doing both, though many repeat, "oh the 90mm is fine, it isn't a restriction." I'm thinking my D1 is going to love both.

Padre

You have a great TB ,no need to change,you will not see near the gains with a procharger as your air is pushed into the motor.The maggie sucks its air into the motor,it benifits greatly with a bigger TB and intake .We use stock intake and stock tb on T bones 8 second GTO,we could gain a little with a 102 setup ,but not alot.

[Padre]

Originally Posted by Hendrix-Engineering

You have a great TB ,no need to change,you will not see near the gains with a procharger as your air is pushed into the motor.The maggie sucks its air into the motor,it benifits greatly with a bigger TB and intake .We use stock intake and stock tb on T bones 8 second GTO,we could gain a little with a 102 setup ,but not alot.

Makes sense, thanks for the info.

Padre

[JDP Motorsports]

Originally Posted by Smkymts

I need some advice. I have heard a lot of talk about porting throttle bodies and aftermarket TBs. But unable to find direct comparisons of stock Vs Ported stock, stock vs. 92mm vs. 102mm.
Can anyone share Dyno charts or numbers on stock, Ported, 92mm, 102mm on a Supercharged 6.2l LS3?
As a novice, are we talking just the valve/gate opening or actually increasing the TB assembly size?
Bottom line, what Hp gain would I find on LS3 maggie if I had the TB Ported, or swap in a 92mm or a 102mm?

What boost are you currently running and what boost do you ultimately plan on running? We have a few Maggy/Whipple/ECS cars running the VMAX TB and it is an excellent upgrade at a very reasonable price. I will have some test results from a few of them in the coming months, I just haven't had a chance to do before and after testing with an SC.

On NA applications we see anywhere from 5-8 RWHP and RWTQ but the driveability is greatly improved. The power is much smoother and the throttle response is outstanding. Here is a back to back test we did with the VMAX on a bolt-on 2010 Camaro SS LS3.





On a forced induction application I expect the numbers to be greater but until I test it is simply speculation. I will work on getting this testing done this week if possible and I'll post our results. Please feel free to call, email or PM me anytime with questions.

Kind regards,

Jordan Priestley
888.308.6007

[Whipped416]

on a whipple its about 31 rwhp ... thats tested with the nick williams 102mm

[Smkymts]

Originally Posted by JDP Motorsports

What boost are you currently running and what boost do you ultimately plan on running? We have a few Maggy/Whipple/ECS cars running the VMAX TB and it is an excellent upgrade at a very reasonable price. I will have some test results from a few of them in the coming months, I just haven't had a chance to do before and after testing with an SC.

On a forced induction application I expect the numbers to be greater but until I test it is simply speculation. I will work on getting this testing done this week if possible and I'll post our results. Please feel free to call, email or PM me anytime with questions.

Kind regards,

Jordan Priestley
888.308.6007

I only have 6 PSI with peak of 7. But I'll offer up my car as a ginnea pig for a discounted purchase.

[JANNETTYRACING]

Guys, I hope to make this a little easier to understand.

At 6-8 PSI boost I would not expect anything in Peak Power but definitely more response.

As you turn the blower faster Via Pulleys, Meaning More boost Air flow How ever you want to understand it, Eventually the 90mm TB becomes a Restriction.

At that Point if you change to a 102mm You will see an increase in Power.

The Faster your Turning the Blower the Bigger Gains you will see from this Change.

The Slower you Turn the blower the Less gains will be seen

It is Hard to put a Boost Number on it because Headers, Cams, Ported Heads, Cubic inches all affect Boost in relation to blower speed.

I would Say on the Camaro if your Running Smaller than a 3.4 Pulley on a Maggie then you will see Gains.

Those Gain will be larger as you go smaller on the pulley, or add an overdrive crank pulley or overdrive cog Pulley Etc.

At 17 PSI boost we saw 35 RWHP on the Maggie.

At 10 PSI boost on Cammed Headers, LS3 We saw 25 RWHP

Ted.

[2SS\RS]

Originally Posted by Hendrix-Engineering

You can hook our 102 to any intake,but you need a great intake as well to get max hp,we are starting to address that issue after t day.We will have a carbon fiber PowerChamber for the camaro very soon,and maybe a twin 90mm tb setup

Is this 102 mm TB a direct bolt for Maggy's?