Quote:
Originally Posted by Deakins
Well you really don't have the capability with the GM cylinder head casting to get the airflow needed to spin the engine all that high. Sure, you can cam it to the moon and get it there but you won't see it building good power. If you can't get a head into the 360 c.f. range you won't like the power curve of a NA unit above 7250. Jmho
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My ported heads flow 380/275 @ .600 lift. With my ported MSD/TB they flow in the 340 cfm range. So airflow isn't the issue. I am also not seeing a KPA drop up high. I am leaning towards valve float.