Timing help needed

The Idle air bleeds are .070 and the high speed air bleeds are .032.

This thing will start and idle pretty easily and pretty quickly with no choke. It is a proform 950, milled air horn etc.

I checked where my machinest had them set, which I should have wrote down, but didn't. I believe they were about 3/4 turn out on the rear and half on the front. After a while of messing around and my eyes burning and the place stinking of fuel I set them back to about where he had them sewt and walked away.

One thing I did do however was use a piece of tubing to listen to the barrels and get them to sound the same. This made me open the rears more and close the fronts a tad.

I was thinking of trying .050 - .010 bigger on the IAB's.

Thoughts?

Off idle or blipping the throttle it runs great. It's just very fat at idle and not entirely happy in gear at idle.


If you mean .005-.010 on the IAB’s I think that’s a good idea. I wouldn’t be afraid to get into the mid .080’s if you have to.

Or, you can reduce the IFR’s .004-.006 and see what you get.