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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!
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| | | | Joined: Oct 2005 Posts: 1,317 Shop Shark | | Shop Shark Joined: Oct 2005 Posts: 1,317 | T. Langdon recommends reducing the fuel pressure to 3.5 psi. I've got basically the same setup with an AutoZone Mr. Gasket $30.00 adjustable regulator. It's acturally more like an adjustable orifice as opposed to a genuine "regulator" but it does the job. I also have a gauge setup and 3.5 on the little dial gives you 3.5 at the carb.
At one of the shows some 8-ball cranked it down to 1.5 psi and the truck ran fine at normal highway speeds until I noticed it. I think that part of the Rochester "flooding" issues could be cured by dropping down the pressure to the carb. With stock gearing and running up at 3K I could see where the extra vibration might make it difficult for the needle to seat properly on a 50 year old carb. May be all wet on this "theory" but it might be worth a shot.
Dave | | |
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