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Originally Posted by sperry
To make big horsepower on an STi w/o spending 10 grand... here's the list:
3" Turbo-back exhaust (w/ 1 or no cats) ~$1000
Port the turbo waste-gate (to avoid boost creep) ~$200? or go with a VF22 turbo ~$800
Dyno tuned EcuTek ECU reflash (by a reputable tuner) ~$1000
So, all said and done, that's around $2500 to $3000 for I'd guess 400 to 450hp at the crank. :shock: That's porsche territory, for less than half the cost of a porsche.
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Nope. 370ish crank horsepower. That's all the stock compressor can flow for. Hence Xcelleration.com being full of shit.
450 hp requires a larger turbo and fuel upgrades, etc. Still faster and cheaper than a Porsche though.
I thought a Vishnu stage 1 (exhaust and reflash) gets you to about 380 to 400... assuming you don't boost creep the motor to death, and a VF22 was capable of 400 to 450hp, but would be pushing the stock STi injectors?
Either way, 370 is a still a buttload of power, especially considering the gearing and low-end torque of the STi.