Ive been contemplating on taking my built 355 to the next level with a 383 stroker job. My current cam is a Crane Energizer 302 duration with a max gross lift of .500......will this cam clear flat top pistons with valve reliefs on a 383 stroker? My current engine set up, which isnt in the car YET, is a 355ci with stock crank, eagle light weight rods, keith black forged flat tops, crane cam, performer rpm 64cc heads with 2.02 intake and 1.60 exhaust valves, 1.6 roller rockers, edelbrock torquer 2 intake, and 750 holley double pumper, havent decided on ignition set up yet.

 

Depends on your deck height and your head gasket.

I have 10.7:1 comp, 65cc chambers and have .560 lift now and had plenty of room to spare. Without claying the pistons it's just a guess, but I'd say around .650 is the limit.

 

The maximum valve lift would be 3.700" and still leave .050" for clearance.

Really there is no one way to tell what the max is without checking it with clay and test springs. It's all dictated by valve timing.

For instance, it you have a cam with .650" of lift that is only .005" away from the piston, then advancing or retarding the intake centerline by only 1 or 2 degrees may bring the clearace up to .060" But there's only one way to find out.

And I'm not kidding about the 3.700" valve lift. If you can time it so that valve reaches max opening while the piston's at BDC, and get it to open and close faster than the piston's moving, then it can be done.

AJ

 

only way to know for sure would be to check it i think you could check clearance with an indicator and a set of checking springs. set the valve to max lift then set up the indicator and measure how much more you can push the valve down till it hits the piston. all the SBCs i ever have checked usually can go around .650 before there is an interferance problem

 

My experience is similar to ede's, I don't even bother to check with less than .600". Duration has an effect since it determines when the valves will be open in relation to the piston location; but for a mild cam like that, it's not an issue at all.

 

thanks for the help guys