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| | | | Joined: Dec 2010 Posts: 253 Shop Shark | | Shop Shark Joined: Dec 2010 Posts: 253 | For stovebolt motors (261) does the distributor vacuum advance need to be disabled to check points dwell angle and dwell variation?
-Mike-
1945 Chevrolet G 506 1.5 Ton Military 4X4
1967 Jeep Cj5 with 283 SBC
| | | | | Joined: Feb 2004 Posts: 29,760 Kettle Custodian (pot stirrer) | | Kettle Custodian (pot stirrer) Joined: Feb 2004 Posts: 29,760 | Not necessarily, but it won't hurt to do so. Most dwell problems are caused by worn distributor cam lobes and/or bad shaft bushings, but the dwell does not change much like it does on a Ford distributor. On Fords, the single point pivot system at the breaker plate results in a slight dwell change as the vacuum advance moves. Not so on GM distributors.
Jerry
"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
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| | | | | Joined: Dec 2010 Posts: 253 Shop Shark | | Shop Shark Joined: Dec 2010 Posts: 253 | Thanks Jerry,
This is my first time setting the point gap using a dwell meter. Up until now I have always set them with a feeler gage and called it good enough. I had initially done that with this motor and today when I checked it with the meter I found the gap to be too wide and the dwell to be about 10 degrees off so it was fun for me to get it spot on with the meter. I should have got a tach and dwell meter long ago!
-Mike-
Last edited by sleeve; 06/20/2012 3:21 AM.
1945 Chevrolet G 506 1.5 Ton Military 4X4
1967 Jeep Cj5 with 283 SBC
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