Dave, you know as well as I that a Ford relies on a different Periodic Table than a Chevy does.
Back to reality for a minute, what you state makes sense. Referring to my curves in Post 1, I should adjust my vacuum advance to obtain 7 degrees advance at 15 in Hg, connect it to manifold vacuum (under the throttle plates) then set total timing at idle to 10 degrees BTDC (7 vacuum plus 3 mechanical).
That way punching the throttle at idle will set the timing to 3 degrees BTDC (0 vacuum and 3 mechanical), and as the engine speeds up both the vacuum and mechanical advances will increase, so at cruising condition, 2000 RPM, advance will be about 26 to 28 (5 to 7 vacuum plus 21 mechanical).
Back to reality for a minute, what you state makes sense. Referring to my curves in Post 1, I should adjust my vacuum advance to obtain 7 degrees advance at 15 in Hg, connect it to manifold vacuum (under the throttle plates) then set total timing at idle to 10 degrees BTDC (7 vacuum plus 3 mechanical).
That way punching the throttle at idle will set the timing to 3 degrees BTDC (0 vacuum and 3 mechanical), and as the engine speeds up both the vacuum and mechanical advances will increase, so at cruising condition, 2000 RPM, advance will be about 26 to 28 (5 to 7 vacuum plus 21 mechanical).
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