Re: Lumpy cam and Vac Advance, From the manifold?
Check the timing and see if it needs more timing.
Vacuum advance is to advance the timing when your beast is revving
in the high zone.The more revs, the more advanced it needs to be.
Vacuum advance does not effect idle what so ever.
I had an XB with 220kw,290hp at the wheels.
You will not need to move the advance hose.
Put the timing at around 10-12 degrees, and adjust your carb idle screw to get the idle right. She will fly.
Last edited by TICK4D; 03-16-04 at 06:03 PM.