Christmas continues for MOPAR rsacers

[Billy Nees]

Originally Posted by Sam Capizzi Jr

The 318 2bbl motor has two major issues... Intake/carburetor and Valve clearance. Right now I'm using a 240 duration cam at .050 and I have .025 clearance on the intake and .040 on the exhaust. If they would allow a 4 eyebrow 318 replacement piston, the combo would be good at 185 hp and would pull high rpm with more cam... Btw the 69 motor has .031 less clearance.

Well Sam, if you can stand another FWIW(don't ya just hate us keyboard racers?). I don't know how bad your intake is but I do know that some of the early 70s 318s had a single plane intake that doesn't look bad and the carb is bigger than the carb I'm allowed to use on my 307. Have you ever had the heads on a flowbench? What kind of cranking pressure (cylinder pressure) do you have? I'm asking because I think that your cam is a little too big. Shorten up that duration (and tighten lobesep?) and you've got valve clearence. What have you got for header dia? length?