Does anybody know the difference between a 1999 jap spec STI engine and the STI engines in the cars sold here. I just got my hands on one and i always hear people talking about the Jap spec being better for some reason.. If anyone knows i would appreciate the info.

Regards Brendan

its mostly in the tune, japs get better petrol than we do.

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MY93 Impreza GX 1.8L, 0hp, 0nm

isn't the turbo different?? =S

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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[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

I thought the AUS V5 sti was still 206kw and thats why some engines fried
due to not being tuned properly to 98.

Wasnt V6 sti retuned to 98 an only ran 195kw?

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221.7KW-ATW 498.5NM MMS ROLLER DYNO & BUILT BY STi NINJAS, BUILD #318/600

EBISU SUBARU, SHIBUYA-KU TOKYO

Never had a problem with my V3 pinging on 98 & I've done over 40k in it.

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Beaten up old 98 Gen 2 Liberty, 13.0, stock V3 STI running gear.
07 Transit motor home
69 VF & 70 VG Valiants needing full restoration
Yamaha Zooma 50cc rocket hopefully going with the Transit.

[QUOTE=Pimpreza]Never had a problem with my V3 pinging on 98 & I've done over 3 engines in it [QUOTE]

Fixed.

Yep....V5 & V6 same engine though....slightly less boost on aus V6 is only change afaik.

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[CENTER][COLOR=#ff0000]Built Ej207: Semi-closed RA Cases - Wiseco Forgies - Manley rods - BC 272 cams - GDA Heads - billet f/whl - Vi-pec - WbO2 - 800cc Yellow tops - TD05-20G - 409Hp ath @ 1.75bar on E85[/COLOR][/CENTER]

[QUOTE=dtrally][QUOTE=Pimpreza]Never had a problem with my V3 pinging on 98 & I've done over 3 engines in it Bullshit, cooked it once in the dunes & did a big end pulling 9g with bugger all oil, at least I haven't put a rod through the top of my block

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Beaten up old 98 Gen 2 Liberty, 13.0, stock V3 STI running gear.
07 Transit motor home
69 VF & 70 VG Valiants needing full restoration
Yamaha Zooma 50cc rocket hopefully going with the Transit.

Not trying hard enough

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No more GC8, sad face.
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