STi 3 heads on EJ207 or 257 block?

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08 September 2003, 10:23 AM

hrubago

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Is it possible?

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08 September 2003, 10:56 AM

hrubago

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EJ207 is Sti 8 block
EJ257 is US spec Sti 2.5

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08 September 2003, 11:17 AM

David_Wallis

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Location: Leeds - It was 562.4bhp@28psi on Optimax, How much closer to 600 with race fuel and a bigger turbo?

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physically, yes.

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08 September 2003, 11:21 AM

hrubago

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All holes and screws and oil and water lines in identical position?
Great news for me.
And for sure:
is the truth that Sti 8 improvement over Sti 7 is forged conrods?

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08 September 2003, 08:53 PM

Bob Rawle

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Eurospec STi7 and STi8 engines seem the same in internal spec, least according to the parts book that is.

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08 September 2003, 09:26 PM

hrubago

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And difference between quality of internals between US 2.5 and Eurospec Sti. Heard some rumours that US internals are not as good as JAP and Eurospec. But dont know why?

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