Had my standard b1’s race ported by Barton many years ago and flowed them a few days ago. The exhaust only flows 250 cfm at 550 lift at 25”. Valve size is 1.785. No gain from 550 to 800 lift. 2.300 intake maxes out at 368 cfm at .700 lift at 25”. This is an all out race motor with a roller cam. Is there more flow to be gained? This 451 race motor only made 794 hp at 7300 and 599 tq at 6300. What should I do?
