Guest Anonymous Posted April 1, 2001 Share Posted April 1, 2001 so i have a p90 head, rebuilt, now what block is best for the l28 conversion... the f54? i have no idea... -Chase Quote Link to comment Share on other sites More sharing options...
GrayZee Posted April 1, 2001 Share Posted April 1, 2001 If you are going with a P90 the F54 block is the only one you should be looking at because it is the one designed for it. You see the P90 has a very large combustion chamber volume and the only way to get reasonable compression out of it it to use flattop pistons (the F54 block) The P90 is a good turbo application but for a naturaly asprirated engine a more desirarble combo might be to use different head on a F54 block that way you can get some higher compression ratios However if you did want to use a different head you'd have to consider other things like valve size (some heads have smaller valves but can be swapped for larger valves and seats) Another thing to consider is that some heads have round exhaust ports (so you'd want the manifold or header to match) I'm just telling you your options but understanding that you have a rebuilt P90 already if just wanna find a block to match it go with the F54. I'll give you some links for interesting reading on the subject and a cool download for engine combos. http://www.ideal-z.com/downloads.htm http://www.zcluboftexas.org/l28combo.htm http://www.mindspring.com/~blittl/engine.html http://www.geocities.com/MotorCity/Track/6997/ BTW I believe the place to find a F54 would be a 81-83 280zx [This message has been edited by GrayZee (edited April 01, 2001).] Quote Link to comment Share on other sites More sharing options...
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