The Ford Barn - View Single Post

40cpe · 11-13-2020, 11:06 AM

I have your advance adjuster in mine and I have used it. I have an L100 in my 276" 8BA. On deceleration (like approaching a stop sign in high gear) my car "surges" or "bucks" from about 12-1300 rpm and get worse about 8-900. I can set the initial advance about 4 degrees AFTER tdc and it almost goes away. The timed vacuum advance brings it back up when I accelerate. I did set my TDC mark with a dead stop with the head off and checked it with a wire tie afterwards so my mark is accurate. I'm not hi-jacking the thread, but I use the adjustable advance trying to minimize this irritating and possibly damaging bucking in the driveline. BTW, it doesn't do it if I turn the ignition off.

I'm just curious of the adjuster causes enough imbalance in the shaft to effect bushing wear.

11-13-2020, 11:06 AM	#5
40cpe Senior Member Join Date: May 2010 Location: Star, MS Posts: 4,024	Re: SBC / 8BA distributors I have your advance adjuster in mine and I have used it. I have an L100 in my 276" 8BA. On deceleration (like approaching a stop sign in high gear) my car "surges" or "bucks" from about 12-1300 rpm and get worse about 8-900. I can set the initial advance about 4 degrees AFTER tdc and it almost goes away. The timed vacuum advance brings it back up when I accelerate. I did set my TDC mark with a dead stop with the head off and checked it with a wire tie afterwards so my mark is accurate. I'm not hi-jacking the thread, but I use the adjustable advance trying to minimize this irritating and possibly damaging bucking in the driveline. BTW, it doesn't do it if I turn the ignition off. I'm just curious of the adjuster causes enough imbalance in the shaft to effect bushing wear.