I've slammed a couple fingers in car doors....plus have to bite on a lot of them because of some of my customers.....
Clevelands have two
oil pressure ports. One at the rear of the block at the very tail end of the oiling path, and one at the front near the pump. There is between 10-15 psi difference between the two ports. Tried a couple different oils, pressure was around 60-65 psi if I remember right at the front of the engine. Bottom line is that you don't need a ton of
oil pressure to make an engine live.
My high effort FE heads run 5/16" valves. Not really a great difference in flow, but a good weight savings.
HR heads move some air, but I've never seen them touch the TP heads. These TP heads were hand ported, but the CSA was closed up quite a bit. They are groundhog-hole-ports now, not tunnel ports.
And yes, higher
oil pressure (not just higher viscosity) will lose hp....
We gotta teach you how to double tap that enter key between thoughts Rick.
