Cylinder head flow - What is crucial in a stocker?

[Mark Yacavone]

Originally Posted by HP HUNTER

I will answer your question: My stocker combination also had .398 lift @ the valve. I dyno tested my engine as it came out of the car 474 HP @ 5400 RPM. I re rung the short block and turned my attention to the heads and intake. I focused on the .200 .300 .400 lift flow and made a nice gain. The engine went back on the dyno, I now had had 513 HP @ 5700-6000. In the real world that HP increase picked my car up exactly 3.2 MPH.
A BBC oval port head with either .398 or .460 lift @ the valve will require either welding the intake seat or Intake valve seats to do what your trying to do, as cast the bowl is too big for a 2.070 valve, which destroys low lift flow.



Example

There ya' go..Talk about sharing..Wow!