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Mod | | | Forums66 Topics128,052 Posts1,055,716 Members48,426 | | Most Online14,466
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| AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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| THANKS!
For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
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| | | Joined: Sep 2001 Posts: 29,269 Bubba - Curmudgeon | | Bubba - Curmudgeon Joined: Sep 2001 Posts: 29,269 | Octane Selector - Operator's Manual For "maximum vacuum timing", I rotate the distributor in both directions from the maximum vacuum reading - then rotate the distributor back to the middle position. You could then drive and then adjust to a setting that is just before obtaining a "ping" (however, I don't fiddle with the middle-point setting). | | |
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