WRX V STI Main Engine Differences ? - New age

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28 September 2005, 04:00 PM

KK3960

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WRX V STI Main Engine Differences ? - New age

Can anyone sum up what the main engine differences are between the 2 vehicles ! Im aware the turbo's are different and injectors and the STI has a catless u-pipe but what about different internals ?

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28 September 2005, 05:19 PM

Turbotits

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I think the sti has forged pistons and also variable valve timing.Probably has other internal differences as well.

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28 September 2005, 05:41 PM

cookstar

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I was told by a Subaru sales man that 80% od the engine parts where different for the two cars, not sure how true that is though.

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28 September 2005, 09:46 PM

Stiver3

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Bigger turbo
Better intercooler
Forged Pistons, conrods
Different exhaust system
Different power band, ecu changes
Bigger injectors+++many other parts...