Pinto Car Club of America

Is the vacuum advance necessary?

The way I understand it, connecting the vacuum advance to PORTED vacuum is an emissions thing that results in worse mileage and power.  That is what i am told and have read. (Doesnt really make sense to me tho, because connecting it this way gives you advancted timing on acceleration which is when you need it and then pulls the timing back when you dont need it)

However, if you connected it to full unported manifold vacuum, you actually LOSE advance while accelerating since vacuum is low with the throttle open. This is not an ideal situation either.

Why not just disconnect the vacuum advance and run the full 25-30 degrees (or whatever it might be) of advance all the time?

What WOULD that exact amount be?

If you want the real skinney, contact Mel's Ignitions. He is the ONE.
(919)663-2816 I have had 3 2300 ignitions set up by him. no vacumn
all work great