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dwmurry2006 · 08-24-2010, 12:29 AM

basically my confusion arrises from when I had my points in my truck. When that distributor was in there I had the timing set at 4* btdc like I was told to do and it idled as smooth as that old worn out distributor would. you could shut it off put #1 at 0* tdc and pull the cap and the rotor pointed right at #1 pole on the cap.

Now with the hei in there you put #1 at 0* tdc with rotor pointed at #1 pole. start her up and set the timing to 8-10* btdc and its like its too retarded wont accelerate smoothly and when you let out of her she backfires and pops alot, and idles real slow... too retarded correct? so i forget the timing light and time it by ear and then use the light its a couple inches before the timing tab. so I honestly have no clue how many degrees I'm timed at. unless on the tab they go in increments of 1 degrees instead of multiples of 2 like i was told.

Holding the timing light while slowly revving it up the timing doesnt start advancing until like 2k rpms but it advances. (mechanical adv.)

08-24-2010, 12:29 AM	#11
dwmurry2006 Registered User Join Date: Dec 2009 Location: aurora, mo Posts: 8	Re: setting timing in 68 c-10 with 250 basically my confusion arrises from when I had my points in my truck. When that distributor was in there I had the timing set at 4* btdc like I was told to do and it idled as smooth as that old worn out distributor would. you could shut it off put #1 at 0* tdc and pull the cap and the rotor pointed right at #1 pole on the cap. Now with the hei in there you put #1 at 0* tdc with rotor pointed at #1 pole. start her up and set the timing to 8-10* btdc and its like its too retarded wont accelerate smoothly and when you let out of her she backfires and pops alot, and idles real slow... too retarded correct? so i forget the timing light and time it by ear and then use the light its a couple inches before the timing tab. so I honestly have no clue how many degrees I'm timed at. unless on the tab they go in increments of 1 degrees instead of multiples of 2 like i was told. Holding the timing light while slowly revving it up the timing doesnt start advancing until like 2k rpms but it advances. (mechanical adv.)