Timing

bran3b · #1 (**permalink**) 07-12-2002, 09:17 AM

What should the initial timing be for my 460? The engine is relatively mild (9.5:1 compression, 750 cfm carb, cast heads...). I have an MSD 6AL controller and MSD distributor.

I am trying to diagnose a stumble when the secondaries open, but want to make sure that everything else is correct before I start chasing that symptom.

Thanks,
Bran

HighPlainsDrifter · #2 (**permalink**) 07-12-2002, 02:42 PM

Hey Bran,
I have a mild 9:0 to 1 pistons,460 with 280 comp cam. I run a msd 6al and accel distributor with 12 degrees of vacuum advance. The vacuum at idle will get rid of the stumble. I set my initial timing at 14 degrees and mechanical springs at 24 degrees, so 38 degrees total timing and another 12 of vacuum at light throttle/cruise which drops off under W.O.T. I have no problems with pinging running 92 super chevron.
Perry.