I would like to upgrade my GMC's performance. I have run an Isky E2 for many years. This is a mild cam with .298 cam lift and 286 deg. duration, .22o duration at .050 lift. I am thinking about installing another cam.
I have a 3250 pound 40 Chevy Coupe with a ported head and big valves, 9:1 compression and HEI distributor. I run a Camaro T5 and a 4.11 rear end. Right now it idles well at 600 rpm, pulls well at 1500 in overdrive at 40 mph and winds up to 5500 rpm quickly. My best performance figures are: 9.9 sec. and 72 in 1/8 mile and 15.9 sec. and 89 mph in 1/4 mile. Based on drag racing calculations my engine puts out about 185 hp.
I want to improve my drag race performance while still being able to drive the car easily. I am consider both flat tappet and roller cams. Any ideas would be appreciated.
