Direct Connection ( Mullen LA ) heads

PRH said
Pretty cool.
2.19” intake valve

108@3” = 330@28”

Since the flow drops sharply and suddenly after .650 lift, being tested at 3” pressure....... it’s certainly possible the onset of that phenomenon could easily start to occur at a lower lift than .650....... if the head were being tested at a higher presssure.......like 28”.

There’s other flow tests later with “other” heads at 28”, but those test were done by Phoenix (Tarozzi) in later 70’s.

He (Tarozzi) even creates a factoring sheet between his and another flow bench.

These correction factors are not linear. Different factors for different SCFM....hmmm