Quote:
Originally Posted by zigzagz94
They have always said any STi version would be faster than the standard one, so I'm guessing some NA tuning maybe bore and stroke.
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I think you may be right about the need for more displacement.
Based on some earlier comments I heard out of Subaru, their stated goal was 250 hp normally aspirated. Higher lift/duration cams, stronger valve springs, and an 8500 rpm redline (and maybe revised intake manifold, tb, and exhaust) might be enough for 230-240 hp, but I can't see you getting too much more power out of a 2.0L production engine that lacks variable valve lift.
My guess is that Subaru will need to bump displacement to 2.2L to hit 250 hp NA.