I just finished setting my timing with a dial back light. I set it at 16 BTDC which is about 40 degrees less that what it was at previously. Before doing this I verified the timing mark on the balancer with a piston stop, since I was going to make such a big change in the timing. Now when the engine is cold I get an occasional pop through the carb when I give it a quick throttle from idle. Here is some information on the engine, BB427, Mechanical cam with .024 valve clearance, Holley 850 DP 76 Pri 78 Sec, Single Plane Intake, Mechanical advance distributor Mallory Comp 9000, Taylor wires, Accel coil. The cylinder pressure is 130 on all cylinders. I have about 36 degrees total advance around 2800. How much initial advance should I be running. The car starts easily, but the popping concerns me. I can advance the dist and the idle increases dramatically without any other changes. The car ran fine before I set the timing back to 16 BTDC, but was really hard to start. Any suggestions.
67 SS 427