02 mods?
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This is a discussion on 02 mods? within the Engine Modifications forums, part of the Tech & Modifying & General Repairs category; hey i have an 02 wrx and im looking to hit close to 400hp at crank. it already has spt ...

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    02 mods?

    hey i have an 02 wrx and im looking to hit close to 400hp at crank. it already has spt intake with spectrum filter, 3in catless dp and TBE. Sti IHI turbo with jdm injectors. has sti TMIC, im looking at getting a walbro 255LPH pump and getting the 850cc injectors, with wide band air sensor to monitor. it has an open source tune on it, i plan on having it pro tuned and dyno, it curently boosts 13-14 psi, would a manual controller actually help boost more? and is it safe?. what else should i do? thanks for the help!

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    02 mods?

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    400bhp with an STI turbo on pump gas is pushing it.

    A MBC is a supporting modification, which allows you to up the boost. With increased boost, you need to adjust timing/fueling to match it.
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    Registered User Ruh Roh's Avatar
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    dont forget about building your trans if ya want 400

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    Quote Originally Posted by Ruh Roh View Post
    dont forget about building your trans if ya want 400
    400bhp = 310-320whp and likely about 280 wtq.

    While thats definitely a danger territory, the OP should still be OK with the stock tranny.


    OP, if shooing for 320whp, you'll need a better TMIC than the STi TMIC. Consider something with a lower pressure drop such as a ProcessWest or an AVO TMIC. Minimum of a TD05H-16GXT turbo and an EWG will certainly help.
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    Registered User wreckingball man's Avatar
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    16g on around 20psi of boost would be "safe" territory. You would be fine with 750cc injectors. 255Lph pump is fine also. I'd say that'd hit less than 300whp, but it'd come close. You may decide to shoot lower. But it also depends on dyno, weather, blah blah you probably know.

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    thanks for all the help, im planing on getting the 6speed sti tranny in the near future. i just want to have the engine side done first. what clutches would you recommend for that much hp? and would the upgraded clutch help with the stock tranny or make it worse? ive herd that up graded clutches can actually break trannys is that true? i would love to hit 300-320 whp

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    Re: 02 mods?

    Quote Originally Posted by matt.02wrx View Post
    thanks for all the help, im planing on getting the 6speed sti tranny in the near future. i just want to have the engine side done first. what clutches would you recommend for that much hp? and would the upgraded clutch help with the stock tranny or make it worse? ive herd that up graded clutches can actually break trannys is that true? i would love to hit 300-320 whp
    An uprated clutch will hasten the transmission's demise. FWIW, I hit 300whp on my stock clutch with 104,000 miles on it

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