[Michael C Henry]

I have a 427 and I'm using a Mallory HYFire VI box. It has the option of programing in the degree of spark retard. It affects the ignition timing under 500 rpm(starting). I'm running 18° iniial with 14° retard and centrifigal advance 0f 10°x2=20° for a total of 38° total. I found that I had to reduce the idle stop screw( close the carbruetor) the more I advanced the initial timing. I also have the rev limiter (maximum RPM) programmed at 6,000 RPM just to be safe. It hits that mark in a hart beat. in the first two gears.