ok so im building my EVO and a friend of mine is building his STI. here is what we are doing which one do you think would be faster from a start and which one fast on the freeway?

EVO:
280's
gt30r turbo kit
racefmic
cat delete
exhaust
780 injectors
xede for 92 & 100
other misc.

STi:
gt35r
front mount
injector
cat delete
3.5 perrin exhaust
tuned utec
other misc.
(he is running the stock exhaust manifold though)
i think that there might be some other little things, but nothing really that will make a big diffrence.

 

Honestly, coming from the Subaru world...I don't see many home built STi's running that fast on a stock USDM block. Lookingforpower has the Ultimate Racing GT35R kit and on race gas has run 11.6's. The STi gearing is really bad for drag racing which makes it even harder...the USDM STi heads are almost identical to USDM wrx heads, they get a little more cam and AVCS but thats about it.

Also, stock exhaust manifolds have gone in the 10's on Subarus. A few of the low 11 second WRXs swear by them. The manifold is so long that if its not properly coated and made out of thin stainless steel you lose all heat retention and have a very peaky power curve.

 

Are you sure he can run the stock manifold in the subey with a GT series turbo? Now that I think about it there may be a non-rotate mount kit out now.. Slow boy? hmmm..

Anyway.. The subey will probably lay down higher numbers, but as mentioned above the Evo 5 spd is a faster gearbox than the subaru 6 speed.

 

The manifold can be left alone, you need a rotated up pipe and down pipe only. Slowboy makes a gt30 but I don't think anyone makes a non-rotated gt35r. Even if it wasn't rotated you would have trouble clearing some stuff, once you get into the red's/sz65 range you have to notch the tranny and remove the tgv's to get it to fit...and then the smaller inlet pipe under the intake manifold hurts you.

As for higher numbers..the USDM cams/heads are really a big restriction. From what I've been seeing stock Evo numbers are easily pushing into the mid 300's without a problem, where as an STi needs a 20g/Green to make those numbers.

 

The dyno #'s should be pretty close. The GT35R STi might put down a tad more power. The Evo's 5spd will probably make it faster through the 1/4 mile though. Drivers being equal of course.

 

quick question for you subie guys:

how does the FP green compare to the 35r?

 

FP green is not near as big as a 35R. 2 completly different classes. FP green has a 49lb min. wheel. I don't remember what the GT35R is, but it's bigger than that.

 

are you both going to be running pump gas? if you are, you should go out and buy an alky kit and make just as much or maybe more power as him.

 

FP Green is a 400 whp (at best) turbo for STi's (on pump gas) and is usually a low 12 second turbo on pump. There is however a Spec C swapped WRX with a green running 11.2 on race gas. The GT35R on USDM STi's is an 11 second turbo for the most part, but Big Valley ran 10's on it.

Its really hard to gauge in the Subaru world (hence why I'm leaving it). I don't know if its due to the 6 speed's extra gear shifts, 5 speeds breaking in the low 12's or the crappy heads/cam combos all USDM WRX/STi's have to deal with but with big turbos on a Subaru its hit or miss....a reputable tuner/shop will run a great number with them and then thats the last good e.t. you hear out of that turbo.

 

Thanks, wasn't sure of the specs on the greene.