It's Radar again playing with the 390 cfm Holley . I tried a 0.028 accel. pump nozzle and added a small vacuum chamber in spark advance line. The vacuum chamber made the engine diesel when turned off. The stumble is still present. Taking off the Vacuum Chamber now.
The earlier changes made to the Power Valve and the larger nozzles has made he stumble less. The stumble occurs just after the car is rolling and the accelerator is pressed down quickly to gain speed. Taking off in traffic is a problem. If I really rev up the engine before the clutch is engaged it takes off fine.
Just ordered 0.032 and 0.035 nozzles. Hope they work- I'll let you know.
