I recently upgraded from an old Accel BEI ignition to an MSD 6al with pro billet distributor. I'm running the same plugs I did with the BEI and the same fuel mixture 50/50 93 octane and Cam2 I ran with the BEI. The Engine has not been touched since the ignition upgrade and is still 12:1. My problem is I'm detonating something fierce. I'm running the same timing as I did with the BEI as well. 38* total. Do I need to switch to a cooler plug? The ones now have prob 10 miles on them and the ceramic around the electrode is starting to fall apart. Needless to say its not getting driven again until its fixed. What gives? Is the MSD that much of a hotter spark then the old one?