We have a Chevy 402 bored .030 over, Keith Black 10.5-1 pistons, comp roller cam and rockers. The heads have been reworked. Edelbrock air gap intake and Edelbrock model 1813 800 CFM carb. We have a dead spot in the transition from idle to acceleration. The dead spot happens at the take off from a dead start under normal acceleration. After we get past the dead spot, the engine performs great.
We have changed the rods and jets using the guide that came with the carb. We have changed the springs using the strongest to the weakest and still have the dead spot. The rods move at idle to acceleration like they should. We have moved the accelerator pump to all three positions. We have adjusted the fuel pressure to 5.5 lbs. Changed to a larger squirter. We have moved the timing advanced and retarding, still have the dead spot. We have installed a hotter thermostat and currently running a 180 thermostat. The automatic choke has been moved to every setting. We are running 93 octane gas.