1968 F100 timing issue
Laughing Gas
Joined: Jul 2003
Posts: 884
Likes: 13
From: Bassett Virginia
Have pondered this, and how it would throw timing light indications off. On a Y Block - 15486372 - each cylinder TDC being 1/4 turn of the crank of course but - one tooth off clock index either way of the distributor doesn't equal one cylinder, tho it would throw the timing light off enough to be a head scratcher, I guess.
That's why vacuum gauges are nice. My 64 at first - had the distributor cap clocked 180 out, plus the damper slipped almost 10 degrees, and at that time had hardly a clue what engine timing was about. Figured out #5 was my #1, but never had it running right with a light. Until I got all that straightened out, just timed it for max vacuum at idle -1 in. And that was about perfect. Replaced the damper, and worn out distributor, runs a lot smoother and takes the guesswork out. Now I could time it by ear! Runs about 14-16 deg. initial at max vacuum iirc, 24 mechanical, all in by 3000, runs a lot better.
That's why vacuum gauges are nice. My 64 at first - had the distributor cap clocked 180 out, plus the damper slipped almost 10 degrees, and at that time had hardly a clue what engine timing was about. Figured out #5 was my #1, but never had it running right with a light. Until I got all that straightened out, just timed it for max vacuum at idle -1 in. And that was about perfect. Replaced the damper, and worn out distributor, runs a lot smoother and takes the guesswork out. Now I could time it by ear! Runs about 14-16 deg. initial at max vacuum iirc, 24 mechanical, all in by 3000, runs a lot better.
Laughing Gas
Joined: Jul 2003
Posts: 884
Likes: 13
From: Bassett Virginia
Post Fiend
Joined: Apr 2002
Posts: 19,311
Likes: 97
From: Waterloo, Iowa
It's easy to confuse who is posting what sometimes in a thread. If I got a 390 in my truck it's news to me!
Laughing Gas
Joined: Jul 2003
Posts: 884
Likes: 13
From: Bassett Virginia
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