Super Charged Slant Six
FYI Bill, we stuck 1.81" int/1.55" exh valves in the heads. Had to unshroud the copper head gasket and cylinder walls for the intake valve.
That's now only 25% smaller (in area) than the 302 Chevy we've been talking about, on the intake, and 6.5% smaller area, on the exhaust.
The exhaust isn't that much of a problem, but 25% (intake) is a huge deficit.
Still, those are great numbers for a slant six!!!
Did you have a chance to flow the head with the bigger valves???
I don't know the flow numbers for the Chevy head... could be anything.
I was just trying to point out the built-in difficulty in getting high specific output numbers from an engine that has the deck stacked against it by the factory, but, I don't think I have to shore up that argument with any more statistics.
Just so you don't get any erroneous ideas, I would rather PUSH a Mopar than drive a Chevy.... and, that's the truth!
It is astounding to me, that Mark's engine runs as well as it does, in view of his uphill battle as regards airflow. He and Mike Jeffries must have made a deal with the Devil!!! That thing flies.... :happy7:
