stamper5.0

im getting a new cam ....had the b 303 cam....want a bigger one...but not to big so i dont have to flycut my pistons...... would i have to fly cut with this cam??....

COMP Cams Nitrous HP Camshafts
Camshaft, Hydraulic Roller Tappet, Advertised Duration 274/ 286, Lift .555/ .570, Ford, Small Block, Each

stamper5.0

someone had to kno something...help me out

92GreyGT

I take it you are putting this on a stock short block? If so my guess would be yes but the best way to tell is clay a piston. What heads are you using?

stamper5.0

using protopline heads...the block is bored .30 over...i have a b cam now...but im putting those heads on and i want a new cam...

92GreyGT

What pistons did you use? Those heads have 2.02 intakes, correct?

stamper5.0

i have speed pro pistons...and ya i believe its 2.02 intakes

92GreyGT

Do those pistons have extra valve releifs or are they just stock replacements? If you are going to have the heads off anyway just clay the pistons and see if it'll clear.

stamper5.0

im not sure....but i can check...idk what u mean by clay the pistons?..

92GreyGT

Install the new cam, head (using the old head gasket), pushrods on one cylider, and roller rockers. Before you put the head get some modeling clay and put it on top of the piston where the reliefs are. Slowly and gently spin the motor over a couple of revolutions. While you turning the engine over it locks up do not try to force it, that is the piston hitting the valve. If it goes ok take the head off and check to see how thick the clay is where the valve pushed into it. You need .120" on the intake and .080" on the exhaust to be safe.

stamper5.0

alright thats what i thought u meant....the 2 cams arnt that different the duration on the comp cam is small but slip b,c its a nitrous cam...the lift is bogger the the b cam...which one should i be worried about?