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| | | Forums66 Topics128,049 Posts1,055,693 Members48,426 | | 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: Feb 2000 Posts: 69 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 69 | It looks like the duration and timing on the shafts are quite a bit different. The sound seems like an overlap of the intake into the exhaust. I don't know why this would happen under load and then taper off but this it what it sounds like. My homemade degree indicator seems like the valves are not opening and closing correctly. Guess I'll have to pull all the sheet metal and take it apart. Fun..........? | | |
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