PrecisionH23a

I thought I would share this with you guys. Our customer currently had a stock LS with Peak-Boost (t3 57trim) turbo kit and made 267whp @10-11psi. With the addition of a GSR head, ITR Cams, Skunk2 Cam Gears, Edelbrock Victor X manifold, and of course dyno tuning the s300 we picked up a very good bit of horsepower with less boost.





317whp/227tq at 9.5psi. For all the correction factor haters, the 317whp/220tq uncorrected was 306whp SAE. The chart showing 250whp was at 9.5 psi to compare the difference at the same boost pressures. The bottom end of course is bone stock so I did not feel comfortable reving out to 8200rpms which clearly would have kept making power to around 340ish whp.

Schister66

That's a pretty substantial gain. Goes to show that VTEC heads really are magic

PrecisionH23a

Vtak ftw! The ITR cams definetely helped out a ton. I also forgot to mention this was on pump gas.

spoolin turbo s

goes to show that its not just the vtec, but the entire head and valvetrain are like night and day

Ls_dx

iTrader: (5)

Nice numbers. 300 Hp Is really fun on the streets

DOHC_16v

Nice numbers/powerband. It's good to see what a proper head/cams can do.
My setup needs 17psi to make the same #s, with more torks of course. Where can I get this Vtak/TypeR for my VW?

spoolin turbo s

a 20v head ported to hell with oversize valves and a solid lifter with a huge cat cam would be very comparable flow wise to a stock f20c head and with the solid lifter kit you could rev to 10,000rpm's maybe 500-1000 more, with the hydraulic lifters you are limited to about 9000 rpms with a good valve train such as supertech

it'll cost you about 6-8k on top of a built 2.0 stroker with the forged crank from the fsi

and there you go

just no one in the vw world will drop the dime to do it, the stuff is made to do just as much or more than Honda's but no one wants to pay to play with the above setup with a cam still on hydraulic lifters and a STOCK AEB head with a t3t67 not sure if it was the HO version or not but 713whp is the most that has been made and that is the most out of a 20v 4 cylinder so far and 615 whp has been made on a 1000cc chip tune with a s362 while only revving to 7500rpms which i think is amazing to make that much power without revving any higher while the 713 was on standalone and revved to 9000 if i remember correctly

i know where a head like this is setting for sale with a supertech valvetrain and would just need a solid lifter conversion and the cams...........and i've seen the flow sheet it flows more than a stock k20 or f20c

pm me if interested its actually a REALLY good price at a very reputable company endyn did it and still has it. some guy dropped it off didn't pay, and never came back. it flows 301cfm max on the flow sheet if i recall correctly

turbo-crx

wont the valves dig into the the stock ls pistons with Itr cams? I know my Ctr's did.

DOHC_16v

I was just joking, but thanks for all the info. I don't have the coin for a SERIOUS setup, and if I did it would be in a RWD or AWD car.
The highest hp 20v is 857whp

92rotteneg

good numbers, gotta love the ls/vtec turbo.

PrecisionH23a

That's why checking piston to valve clearance is important.

spoolin turbo s

is that 4 or 5 cyl 20v? and was that gas or alcohol? the one i mentioned was on gas?
also what turbo was that with?

and i hear you about awd or rwd

turbo-crx

did you use a thicker hg?

hayn_integra

Hey! I know this car!

92redhatch

nice.

legomytego

i was told you cant get away with itr cams on stock ls/vtecs how do you go about doing it do they have to be advanced or anything ?

blinx9900

importtuner did something similar years ago and the addition of the vtec head added 35whp on a turbo B, i think that was on fmu setup too!

PrecisionH23a

You check clearances. We are running a slightly thicker headgasket and were very careful when it came to dialing in the cams on the dyno.