ptrfree

I would like to have some input on this cam I had specked for my combo, The setup is an LS3 with a 4.00 stroke, 416CI, 12.5 pistons, stock LS3 heads and intake, Its going in a C5 with an A4, 3800 stall, 3.42 gears. Its a street/strip car, not my daily. Any input would be greatly appreciated.
Lee



Cam Valve Events 0.006 0.050 0.200
Intake Duration - ID 294 239 158 13050R HUC lobe .621"
Exhaust Duration - ED 306 251 169 13053R HUC lobe .632"
Lobe Center Angle - LSA 114+2
Intake Centerline - ICL 112

Intake Valve opens - IVO 35 7.5 -33 BTDC (- indicates ATDC)
Intake Valve closes - IVC 79 51.5 11 ABDC
Exhaust Valve Opens - EVO 89 61.5 20.5 BBDC
Exhaust Valve Closes - EVC 37 9.5 -31.5 ATDC (- indicates BTDC)
Exhaust Centerline - ECL 116 116 116
Overlap 72 17 -64.5 degrees

chevy406

That is a rowdy cam. You are a little too vague with the engine build for anyone to say for sure if you will have sufficient valve-to-piston clearance. Also the "12.5 pistons" doesn't give enough information to really know what your static and dynamic compression will be.

Additional information needed is combustion chamber volume, head gasket thickness, connecting rod length, piston crown/dish, piston deck height...