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this being a race only piece. using same cam, heads, compression, everything. how would a 496 4.31x4.25 compare to a 499 4.375x4.15. i am sure the smaller bore would hurt flow some, but would have a lighter rotating weight. so what does everyone think?



the way the question is worded makes it pretty generic. your not offering any specifics for the build regarding the heads, cam, compression, intake manifold, etc. etc. or for the car it would go in. if this is a build your actually considering, the answers would be better if you added some information.




okay, 13-1 compression flattop zero deck,284 288 680 lift lsa 108, -1 heads 2.19&1.81 325cc cnc port flow 355 or so, dominater on alky

i know how this runs in a 440 block with a 4.150&4.375 how would this run in a 383 with 4.31x4.25 stroke