TheLRZ
Well Known Member
I don't mean to degrage your cam choice after all it's your car and should be done to your standsrds.The informatin that .492 lift is the largest that you could put in due to the pistons is flatly wrong.I don't know where it came from as lift it's self has nothing to do with bent valves.The period of time in the engines cycle that's called overlap is where the problem comes from.From what you posted about the engines lousy power out put and the time expense and expertice that's going into this engine suggests that you want at least the rated out put of 340 to be reachhed.That Isky cam won 't get it done as it's only about 5 degrees bigger on the intake side and 4 degrees smaller on the exhaust side than the stock cam.Unless the exhaust side of the head is porte enough to bring the flow balance to 80 percent or better of the intake[stock is about 65]a single pattern cam is a bad idea especially with manifolds.Chev.didn't do it and niether should you.In a bubble top for 62 the 409 had just a little lope and a fairly strong mid range.What you've chosen will idle dead smooth get fair mileage but very little power,certainly not 340 from what I've seen about this build.
“ 202 can go up 1 it’s 510 lift & .224 @ .050 “