I have a stock bottom end 454 with oval port open chamber heads with crane valve springs and compcams thunder cam
Basic Operating RPM Range: 1,800-5,600
Intake Duration at 050 inch Lift: 227
Exhaust Duration at 050 inch Lift: 241
Duration at 050 inch Lift: 227 int./241 exh.
Advertised Intake Duration: 279
Advertised Exhaust Duration: 296
Advertised Duration: 279 int./296 exh.
Intake Valve Lift with Factory Rocker Arm Ratio: 0.498 in.
Exhaust Valve Lift with Factory Rocker Arm Ratio: 0.483 in.
Valve Lift with Factory Rocker Arm Ratio: 0.498 int./0.483 exh. lift
Lobe Separation (degrees): 107
Intake is a old edlebrock TR2X bottom with a TR4X top with a single 4160 750 (brand new) with 72 main jets, 3.5 power valve and 2.5 turns out on idle mixture. Running 10 degrees initial and not sure on mechanical with mallory unilite with mechanical advance and not sure of what springs (Can't tell what color.), advance tab is bent just beyond middle to the advanced side. Car runs very good off idle and low end but when you get into the throttle it cuts out and kinda pops. I am also around 6000 ft or so. I was going to try a lighter secondary diaphragm spring and some bigger main jets with also maybe a bigger squirter (currently a 35). What other things can I try to eliminate this problem.
http://s393.photobucket.com/albums/p...t=P5180188.flv