I've read the timing 101 article, but am still confused about the mechanical timing.
I have a 496 with a hyd roller cam, 238/243 dur 634/643 lift 112lsa, Accel HEI.
My best vacuum idle is 14.5/15".
I have the initial timing at 20*, vacuum advance hooked to manifold vacuum.
The motor seems to like it best this way for the power brakes.
When I unplugged the vac advance and ran the motor to 3000 rpms the mech advance was 35*, +20* would be 55* total. That seems very high to me.
I changed the dizzy springs a few times and got a best of 32* mechanical. So that + 20* initial =52*. Still too high?
The car runs good, don't think I hear any pinging. Im just afraid of ruining my new motor. I'm pretty unfamiliar with playing with mech advance. Any other way to lower it? Or is 52* total fine for my combo? Vacuum advance hooked to manifold is definitely necessary on it. It made a world of difference when I changed it to that from ported.
I have a 496 with a hyd roller cam, 238/243 dur 634/643 lift 112lsa, Accel HEI.
My best vacuum idle is 14.5/15".
I have the initial timing at 20*, vacuum advance hooked to manifold vacuum.
The motor seems to like it best this way for the power brakes.
When I unplugged the vac advance and ran the motor to 3000 rpms the mech advance was 35*, +20* would be 55* total. That seems very high to me.
I changed the dizzy springs a few times and got a best of 32* mechanical. So that + 20* initial =52*. Still too high?
The car runs good, don't think I hear any pinging. Im just afraid of ruining my new motor. I'm pretty unfamiliar with playing with mech advance. Any other way to lower it? Or is 52* total fine for my combo? Vacuum advance hooked to manifold is definitely necessary on it. It made a world of difference when I changed it to that from ported.