Good Initial Timing and Too much Total Timing Problem. Seeking guidance to minimize total timing. 1969 Swinger 340 4 Gear

66fyssh said

RRR is right on.

My 5.9 Magnum likes 20⁰ initial. I use an FBO advance limiting plate set at 14⁰ for an "all in" of 34⁰.

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Shouldn’t initial timing(12 in my case)plus mechanical timing(haven’t tested this yet)=all in timing(57 in my case) 12+mechanical timing=57deg. Therefore my mechanical timing is 45deg which would be the mechanical timing. This sounds like way to much? What am I missing?