[Wade Chamberlain]

Fred - are you using the EEC-IV Ford computer, or some other aftermarket type unit? If you're using the EEC-IV, I'll ask the obvious question --- did you pull the "spout" connector in the distributor wiring when setting your base timing?

If you're using the EEC-IV w/ standard advance curves, with 18° initial, then you've got about 34° total advance. That's probably 8-10° too much for a normal, safe, supercharged setup! I don't know how much the intercooler helps, but I'd be real scared at 18° initial unless you're running a boost-retard setup (MSD, Crane, etc.).

How much boost are you making?

I run about 14° initial, and then use the boost-retard feature of my Crane Hi6TRC ignition to pull out about 1/2° - 1° per pound of boost (depending on octane, temp, etc.). So, at my peak of 7 PSI, I'm between 23° and 26.5° total.