Thread: Whats the difference, JAP SPEC 1999 STI motor??
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Old 09-12-2008, 09:57 PM
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Vf28 Aus spec
Vf29 Jap spec

Vf29 has slight (updated) compressor wheel design changes from vf28 but in reality...

same...same...

Jap ecu tuned for 100 ron fuel.....will ping on 98 ron in some instances (hot day & high load apparently).

Did you get the jap ECU?

Aus re-tune dropped 10kw compared to JDM STi....easily found again with exhaust and snorkelectomy.

Basic engine is the same.
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Last edited by Rossco; 09-12-2008 at 10:00 PM.
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