Originally Posted by Tig
Hi. Do a search for it on here Les. This has been asked a few times. Generally you are doing well if you get over 390cfm but it ain't all about max numbers. Ours went over 400 @ .800" on my motor guys bench if you want numbers but I know he don't pay too much credence to it, saying its the "before and after comparison" that counts and we did pick up some. Ours are hand ported and I would be surprised if they actually did go over 390.
HTH's up
https://board.moparts.org/ubbthreads/ubbthreads.php/topics/355932.html
https://board.moparts.org/ubbthreads/ubbthreads.php/topics/295843/572-13-flow-numbers.html
https://board.moparts.org/ubbthreads/ubbthreads.php/topics/926439/indy-440-1-vs-572-13.html


Thanks Tig, up I should've done the search first mate, not on FB anymore as had enough of it, hope to see you@SPR this year, I worked it out that at our measly .625" lift with 1.55's less lash we were lucky to pull 340cfm if that according to calcs for making the hp we do, those were the no's I was interested in really from 600> 650.

Les

Last edited by rb446; 02/08/21 04:08 PM.
1969 'Cuda 446ci, best 9.96@133.9 in 1990
1971 340 'Cuda, best 11.01@122.8 in 1987