BBC pump gas motors
Hey, I am getting a little discusted that I cant seem to make a BBC run the way I want without alot of Compression. I build SBCs and they are just screamers(406 etc.) but I am having trouble building more than 185lbs of cyl pressure with 11:1 BBCs. I always run square port heads and roller cams, just cant get them to 60ft with big stall converters 5000 and up. Is there some camshaft secret? Does it take a 3speed trans to keep the revs up? I can get the dominators to run and rev real responsive but right now I am having a hard time getting a friends 505 with Dart heads and a roller to run better than a 6:70 in a 3400lbs car. It has a dominator and a roller cam. I even went down to a 108 lobe seperation from 110 to see if that would help. The other figures are 708 708 and .277 and 285 at .050 duration. The heads are 320cc. Powerglide and 5200 stall Coan converter. My SBCs are running as good as my 505 I built for the same guy? Maybe the duration on the cam is a little big?