Loss of HP? Help!!
I went to the track this past weekend for test and tune and my car was way slower than expected. Here are the specs. 3550 lb car, 350 chevy w/Dart 64cc 215 heads, comp roller cam xr288hr, performer RPM air-gap intake,Holley750 double pumper, MSD ignition, headers w/3 inch exhaust,3000 stall,TH350,4:11 rearend 28 inch drag radials. This thing runs super strong on idle and revs like crazy sitting still. It only ran a 13.50 and had no pull under a load. It's okay on the street but I don't stand on it much. Plugs look great. Played with the timing from 36-40 but it didn't help. Could this be a fuel delivery problem during wide open throttle? Timing? Should I run a different carb? Electric fuel pump? Any suggestions are greatly appreciated. :?