Holley
Bruce
Thanks for your input.
Actually the 4 side A/F mixture screws are 1/2 turn from fully seated. I just thought they should be more like 1 1/2 turns backed out. And I thought making the 4 idle bleed jets on top of the carb a little bigger would help that. Am I wrong?
The engine only has about 8-9" vacuum at 900 RPM. It is a Quick Fuel Q series 950 4150 on a SBC 377 with a Comp Cams Mutha Thumper hydraulic roller. It is a high compression engine. It has enough vacuum to operate the power disc brakes and runs 7.40 in the 1/8 mile at 3400#.