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Mod | | | Forums66 Topics128,014 Posts1,055,324 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
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on the Internet for over 30 years! and not clogged down
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| | | | Joined: Nov 2011 Posts: 8 New Guy | | New Guy Joined: Nov 2011 Posts: 8 | Hey all. I'm setting the timing on my 54 235 6cyl. I have an HEI distributor in the old girl. I'm reading anywhere from 2-10 degrees. I set it at 10 this morning but I'm getting some back fire through the exhaust. Thank you | | | | | Joined: Jan 2010 Posts: 120 Shop Shark | | Shop Shark Joined: Jan 2010 Posts: 120 | poke a screwdriver down cyl #1 and check that your timing marks are within a mile.
If you have a vacuum gauge, set it for max vacuum at idle.
check that your centrifugal bobweights are OK.
Was it OK before you fiddled with it?
The rotor may be dodgy. HEI units demand better insulation due to higher firepower.
If all else fails, retard it and hold the idle slightly high, then rotate the dizzy fowards and find the spot that gives the greatest increase in idle speed for movement of the dizzy. This will be where its passing over TDC. that will get you moving.
A neon timing light or triggered timing light may show erratic or intermittent timing- then something is wrong.
cheers
Rich
'47 Canadian RHD 1.5 ton truck
| | | | | Joined: Sep 2010 Posts: 695 Shop Shark | | Shop Shark Joined: Sep 2010 Posts: 695 | Hi bgd54,
Did you pull the distributor out and then install the modified one? Maybe you have it 180 out ???
Jerry | | |
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