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#43497 02/08/2004 3:49 AM | Joined: Jul 2003 Posts: 101 Wrench Fetcher | | Wrench Fetcher Joined: Jul 2003 Posts: 101 | GMC 302 motor. Mechanical advance. 2 bbl carb (Holley I think)
I've read a few posts that suggest setting timing with a vacuum guage so that you have the highest vacuum at the highest RPM. I tried this today. The RPM and vacuum (18 lbs) stayed the same over probably an inch of movement of the distributor. After the initial setting it pinged so I turned the distributor clockwise until it stopped. It took about four tries and I probably rotated it 1/2 inch.
Am I doing this right? I don't see how you can set the timing with a vacuum guage when the vacuum and RPM stay the same over probably 20 degrees of rotation of the distributor. | | |
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