bartx7001
01-14-2016, 09:29 PM
This up coming season the track has started allowing Headers. I run a flat top 9.5 to one motor with .390" .410" lift and open chamber head cut down to 70CC. The intake is a stock cast iron gm with a holly 500 CFM 4412. I would like to turn the motor 6600. No stepped headers and 2.5" exhaust. What size header should i buy? Should I get 1 5/8" or 1 3/4" tubes?
I also have two different intake to choose from. I have a 68 327 CI intake with the front oil fill hole. The ports size is smaller than the intake gasket. I also have an egr intake off a 1973 350 CI motor. The intake ports are the same size as the gasket. The 327 intakes plenium is 1/16 deeper than the 350 intake. I have not yet developed a method to measure the runner volume. Any feedback on what intake would be better.
Thank you for the feedback.
I also have two different intake to choose from. I have a 68 327 CI intake with the front oil fill hole. The ports size is smaller than the intake gasket. I also have an egr intake off a 1973 350 CI motor. The intake ports are the same size as the gasket. The 327 intakes plenium is 1/16 deeper than the 350 intake. I have not yet developed a method to measure the runner volume. Any feedback on what intake would be better.
Thank you for the feedback.