(already STFA)
Sorry if I'm just not understanding something. I feel like I'm getting bits and pieces and need the whole procedure. Here's what I gather is the process, from accumulated research. (specifics relate to stock 250 with non-computer controlled HEI distributor)
So I disconnect the vacuum line to the dist, rev to 2000-2500, adjust timing to max vacuum, back off 1" of vacuum. Reconnect line to dist,and then what? Seems that would then add in another 10deg or so of timing. Or am I supposed to leave it connected and time for max vacuum at idle then back off 1"?
I also gather I should use manifold vacuum (researched this exhaustively and this makes the most sense), that the full vacuum advance should be all in around 10" of vacuum or so, "all in" should be about 12-15deg of additional advance, mechanical advance should start coming on at 1000 and be all in by 3000rpm, and it should be roughly 20deg of additional timing.
All of these seem to end up, on my vehicle anyway, at about 14-15deg initial advance.
So at light throttle 15 initial plus 15 vacuum is around 30 total, or at WOT and high (for mine, 3000) rpm,15 initial plus 20 mechanical/centrifugal is around 35 total.
With all of this, discovered my vacuum can Is doing diddly, will replace with adjustable and my mechanical only seems to advance 5-8 degrees, so a recurve kit appears to be in order.
Comments anyone?
