2.5 conversion
25 September 2006, 12:39 PM
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2.5 conversion
I have a 93 wrx and a 98 legacy outback 2.5, can i use the block from the 2.5 with my heads etc to make mine into a 2.5 i have a remapable ecu and quite a few other mods as well.Are the pistons up to the job in the 2.5 block or do i have to replace them?any info will be great thanks
25 September 2006, 01:37 PM
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I think you'll find the legacy 2.5 block is weaker than the Sti version...I've got the latter which I think they call a 257 block. Not 100% on that though
Recommend you do pistons etc anyway if you're looking for over 400bhp on the sti block!
Recommend you do pistons etc anyway if you're looking for over 400bhp on the sti block!
25 September 2006, 04:57 PM
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The 2.5 outback is a N/A motor with higher compression than the turbo variant, so the pistons in it ARE NOT suitable for use in a turbo conversion. (might be interesting to see how long it will run on boost for, before grenading itself though 
)
Block is open-deck, as opposed to the semi-closed on the 2.5 turbo motor.
)Block is open-deck, as opposed to the semi-closed on the 2.5 turbo motor.
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