My 440 with aluminium heads and theorically 10.34:1 compression ratio sometimes is pinging at first moment i put down gas pedal, once I continue pushing gas, the noise desappears.
Now idle advance is 10º and maximum at 34º. I will check it with another strob. pistol.
Maybe the problem comes from distributor with vacuum hose connected, is the mopar performance unit, maybe the springs are too soft and the first gas hit causes it?
What do you think? I'm using always 98 octane fuel.
I'm thinking of change it for a MSD distributor, I heard it doesn't need the vacuum hose and you can calibrate the advance easier. The MSD 6AL box is already installed.