I can't seem to find anywhere on this site certain info. that reads, "300 WHP" with "these(Insert your mods)".

I am currently looking at an STi(04-05) but wish to make 300 WHP. What mods do I need to achieve this? Can anyone help?

Ps: Keep in mind our California crappy 91 Octane


ALSO, is this even the right place to ask?

 

anyone?

 

You would need a turbo-back exhaust and a good tune. You should easily be at 300 with those two simple mods.

 

Easily? You might be close but I don't think the stock fuel system can support 300 whp - I have an 05 STI and I brought it up to 286 with turbo back and ecutek. My injectors were just under 100% duty cycle so we couldn't push the stock turbo any more. I upgraded to 816 cc injectors, Walbro 255l/hr pump, and fuel rail to correct the problem. We then brought boost up to 18 psi and we were able to pull 303 at the wheels. It was a streach on the system.

 

well that answers my question... Thanks a lot guys

 

http://www.vishnutuning.com/impreza_sti.htm

 

You might want to state on what dyno you're trying to hit 300 WHP.

On a Dyno Jet you could probably break 300 WHP with just a good tune and a TBE. On our Mustang 4WD dyno, you're not going to brake 300WHP with your stock turbo. We see about 25% drivetrain losses on our dyno so 300WHP is about 400 crank. You'll see about 270-285 WHP with a good tune, TBE, and headers on our dyno. To break 300WHP you'll almost assuredly need bigger injectors, fp, and a (slightly) bigger turbo. A pn'ped VF34 might even do the trick. An FP Green or 20G will probably net you about 310/310. As someone already stated, the injectors are already running at 96% duty cycle with only a TBE so changing them for bigger units is an excellent idea.

-Geoff

 

so according to them a reflashed ECU, FP Green turbo, PE 850cc, Walbro 255 lph pump,TBE will add 110 at the flywheel????

 

Upgraded Turbo to something like a 20G or bigger, TBE, Injectors, Fuel pump and EM

 

Well atleast I now know what it is I am up against.. But Even at only 285 or so WHP I have heard this car kicks major Booty

 

Geoff,

Do you guys have any more of the six cylinder Legacy engines?

PM me if you do!

 

According to them yes, and I also have talked to guys here and going w/ the fp green turbo set up(kit), plus fmic, etc...you should be in the mid 11s @ 1/4mile...fp green is a 11 sec. turbo...w/ just stock internals...but you can always reinforce them w/ some bad azzz intern...thats my next project... FP Green...

 

think i might look into that.

 

20STI05 - We actually have a modified 20G turbo coming out that will outperform the green. For these larger type turbos, I'd either recommend going really big turbo for maximum efficiency (if you're staying with pump) or running the Cobb Access port with custom map (we can do this for you) to allow you to run higher octane gas. On a small displacement turbo car, octane is key.

Turbo_4life - 285whp on our dyno is close to a 380-390HP car, and is very hard to beat on the street.

DepDivr - Yes, we have 4 coming in on monday. They are $1599, if you want one PLEASE call today, they will sell out in less than 48 hours.

ThunderSTI - In all honestly you will need a very very good launch to run mid 11's on an FP Green with proper tuning and race gas. The green is closer to a low 12 sec turbo on the 2.5.

Cheers,

Gary
Gruppe-S

 

Damit, thats tempting... is it true that they are a straight bolt on to the mounts and tranny?