[jarendall]

what type ignition system are you running, also are you running aluminum heads, jacking the timing around can cause excessive heat build up, which is not good for aluminum, pinging usely comes from to low octane as everyone has mentioned, never run low octane gas in a high performance engine, I am running a Mallory system with the Hyfire module, all you have to set on it is the base timing, the module controls all advance timing, my distributor, has a magnetic pickup and nothing else in it, do you have a vacuum advance