I have a 408W stroker with a Comp Cams XE-274H giving poor idle....I have to open primaries a little to get 950 RPM's!!
Carb will not idle on the idle circuit!! BTW...Edelbrock says it should and they have some doing fine idleing at 8"...I have about 13" of manifold vacuum??
The Ford Ported vacuum advance unit on my Accel solid state distributor gives me full vacuum advance at idle since the ported vacuum reads 8" at 950 RPM's due to the idle setup!!
Mechanical advance is 24* all in by 3000 RPM's so with 12* base and 10* vacuum I have potentially 46* total especially if I try to use "Manifold Vacuum" side...
If I set the base timing at 12* with total mechanical of 24* and add "manifold advance" instead of "ported" I will have about 46* above 3000 RPM's cruising at 70 MPH!! I understand that acceleration will retard the timing with this setup but I'd much rather do it right!!
What am I missing here??
Thanks,
Jack
