I've been reading reading reading. Enough reading about cam selection already. I'm nostalgic. That's the whole reason for the Mustang in the first place. So I want a street car that has much improved performance over what I had previously, 1970 H code 351C 2V Mach 1. I really like the blueprint laid out for a 4V CC build in Sticky#3.
I have the carb, dual plane intake, distributor/coil/module, ped mount rocker arms and the D1ZX balancer I stumbled upon. Assuming manual trans, tallish gears and headers/exhaust to suit.
I have talked to Bullet and they have very strongly recommended modifying Georges Cobra Jet Cam recommendation to a 113 LSA (Yes, I've read this before)and then installing it a further 2 degrees advanced.
My question is what will this screw up?
Duration @ .050 223/235
Valve lift : .567/.568
LSA : 113 degrees
ICL : 110 degrees
Intake opens @ 27.5 BTDC 1.5 @ .050 lift
Intake closes @ 67.5 ABDC 41.5 @ .050
Exhaust opens@ 79.5 BBDC 53.5 @ .050
Exhaust closes @27.5 ATDC 1.5 @ .050
Overlap of 55 degrees is centered around TDC
Overlap of 3 degrees at .050
67.5 + 360 + 79.5 + 507 degrees of crank rotation
I plugged the info into a couple of dynamic compression calculators and have come up with values still under 8:1 assuming a static CR of +- 10:1
If the cam is advanced a further 2 degrees to open the intake valve sooner then it will no longer be centered at TDC. What effect will be noticed?
I have read other street cam recommendations elsewhere that have tighter LSA's (110), open the intake earlier 105 ICL and run less duration or more overlap or both.
Oh, and yes I already have a Wife telling me about "Cart before the Horse" scenario she has to live with.