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| | | Forums66 Topics128,012 Posts1,055,315 Members48,419 | | Most Online14,466 Apr 26th, 2026 | | 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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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down with Ads! Again, thanks! | | | | Joined: Oct 2006 Posts: 117 Shop Shark | | Shop Shark Joined: Oct 2006 Posts: 117 | Just wondering how much initial advance you all are running on your 235's. I have mine set now at 12 advanced with the vac from carb plugged. Seems to run good but almost acts like it could take more. Have'nt heard any spark knock yet but it can't be far off. Like I said just wondering what everyone else has experienced. Thanks, Chuck | | | | | Joined: May 2006 Posts: 8,351 'Bolter | | 'Bolter Joined: May 2006 Posts: 8,351 | I'm running 15, but my truck does not have a vacuum advance on it. I have the Mallory dizzy from Patricks, which does not use one. 15 seems to work very well for me.
Bill Burmeister | | | | | Joined: Dec 2006 Posts: 1,464 Shop Shark | | Shop Shark Joined: Dec 2006 Posts: 1,464 | I have no idea how much advance I'm running on my HEI equipped '54 235. The BB is just barely visible in the window with the vacuum advance plugged. No pinging, good acceleration (well, for a 235). One of these days I'll pop for one of those fancy timing lights that'll read out the advance. | | | | | Joined: Oct 2006 Posts: 117 Shop Shark | | Shop Shark Joined: Oct 2006 Posts: 117 | Yeah my light is old style too. I plugged the vac at carb and with the vac advance base set at about 5 degrees retard, I set the pointer on the BB then I advance the base to 8 degrees advanced. I have good acceleration and so far no pinging so I guess I'll just keep experimenting. One of these days I'll spring for one of them fancy timing lights myself, just have to figure out how to use it then!
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