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up-fixing der car(ma)
YTNUKLR's Avatar
Join Date: Aug 2002
Location: Fremont, CA
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Are there any year constraints? I don't think it would "destroy" the value of the engine to use a 2.0S crank--the rest would be modified anyway.

Bottom line; constraints of a 7R case is 92mm P/C. With a 2.0S crank, you'll only be max 2.6L, which you have. Choice then is 2.4 crank on 92mm, that is a 2.8, which is a truly fantastic engine, in my opinion. But, for racing, I think it makes more sense to use the 3.0 aluminum case, 2.0S crank and 98mm P/C. That will make a 3.0 as I said, or you can get 2.8L by using 95's. Both great engines. Henry Schmidt shows one of these 2.8L short-stroke aluminum engines putting out 315hp at 8500rpm (I would estimate a short-stroke 2987cc would be about 330hp on the same dyno, same conditions) on his website. Several builders (including Henry Schmidt) also don't trust the 2.4 crank above ~7800rpm. Frank Beck broke one hitting 8200 in a 2.7/2.8 race motor like you're planning.

Lastly: the aluminum case is heavier, yes, but only by about 20 lbs. In my opinion, having a LITTLE extra weight in the name of a lot of extra reliability is better.


Last edited by YTNUKLR; 03-24-2005 at 04:28 PM..
Old 03-24-2005, 04:23 PM
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