Edelbrock AVS2 thread

Fuel and Air Systems

  1. Detroit Iron

    Detroit Iron Well-Known Member

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    I recently put the new Edelbrock AVS2 on my very mild 383. I'm having some issues with it, which I won't mention now, but I just wanted to start a thread for those who have these carbs. I'd like to document the issues you have/had and your resolutions to those issues.
     
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    • 68Moparmaniac

      68Moparmaniac Well-Known Member

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      Dropped one on my Power Wagon, 360ci. A few minutes with a screwdriver/tuning and haven't had to touch it since (about 4 yrs). Runs great just have to set it up for winter and summer (choke adjustment). Good carb for the money
       
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      • Bee1971

        Bee1971 Well-Known Member

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        Last edited: Nov 25, 2019
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        • Bee1971

          Bee1971 Well-Known Member

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          I did lean it out slightly on the cruise mode , and I think I am running the 7" pink springs if I remember

          Throttle response off idle thru power is the best carb I have ever owned on a street car

          Honestly for the price , on sale , and throttle response , start and idle = Very Happy
           
          Last edited: Nov 25, 2019
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          • RJRENTON

            RJRENTON FBBO Gold Member FBBO Gold Member

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            A curiosity question....what was the original carb on your 383 and year? And why did you change? If it was a 1971 383, the carb may have been a Holley R4668 (or similar) model 4160 vacuum secondary rated at 750 CFM AND down leg secondary booster venturi. The only problem with this model was a backward idle system (lean for emissions) but can easily fixed to eliminate the off idle lean stumble and secondary mixture due to metering plate instead of replacable jets. A 1969 Carter (original AVS design) carb would be a great substitute to consider. Just my opinion of course.
            BOB RENTON
             
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            • threewood

              threewood FBBO Gold Member FBBO Gold Member

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              I have one on my 440 and it runs fantastic. I had to richen the secondaries after getting the heads ported but otherwise pretty stock. Using the dual feed feature, seeing about 6 psi regulated.
               
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              • lilcuda

                lilcuda Active Member

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                Why not post the issues you are having? Maybe somebody will have a good suggestion.
                 
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                • 4mulas

                  4mulas Well-Known Member

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                  I’m pretty sure edelbrock wants no more than 5.5 psi. I’m putting the 1906 on soon with a cheap mr gasket co. 1-6 psi regulator
                   
                • threewood

                  threewood FBBO Gold Member FBBO Gold Member

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                  Instructions say "do not exceed 6.5psi" but want it set initially at 5.5psi. I've had no issues at 6psi so there is some wiggle room.
                   
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                  • 4mulas

                    4mulas Well-Known Member

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                    Okay, thanks. All I could find at edelbrock was to not exceed maximum 6.5, not that they recommended 6.5. The guys at the speed shop were the ones who recommended to me 5.5 psi. Maybe because they sell a lot of them they know what works and doesn’t, maybe the number of customers coming back with flooding complaints skews the recommend?

                    He also said that ford and Mopar stock fuel pumps seems to be regulated closers to factory specs (5-6lbs), and that it’s the Chevrolet ones that seem to be unpredictable (7-10lbs)
                     
                    Last edited: Dec 26, 2019
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                    • Bee1971

                      Bee1971 Well-Known Member

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                      The original poster still hasn’t mentioned his issues
                       
                    • Detroit Iron

                      Detroit Iron Well-Known Member

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                      I managed to tune the AVS2 pretty well. Very happy with it. One thing I don't like about it is in order to adjust the high idle, you need to remove the transmission kick down connector, and then open the throttle all the way. Carter AVS you can adjust it simply with a 1/4" wrench.

                      Other than that I love it!
                       
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                      • Detroit Iron

                        Detroit Iron Well-Known Member

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                        I installed the AVS2 after removing a Carter 4966. The 4966 is a great carburetor, but this one had some physical problems that weren't repairable. Plus I wanted a choke, so a new carburetor with an electric choke made sense. Especially since this is my daily driver.
                         
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                        • RJRENTON

                          RJRENTON FBBO Gold Member FBBO Gold Member

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                          What were your issues with the original Carter 4966 carb? The origional choke system was a divorced system that Mopar used for years....bimetal spring in a heated well (1970 and later designs used a stainless steel cup in the manifold xover passage to allow for faster reaction) and a vacuum pull off diaphragm. There are shaft bushing kits available as well as almost all other parts including primary booster venturii, jets step up pistons, metering rods, springs, shafts, hardware, butterfly valves and links from many of the major carb rebuilders. The Edlebrock (aka "Eddy") AVS2 carb is a good csrb, but IMO, not as good as the origional Carter as it a "hermaphrodite" using some Carter AFB and AVS design elements. The origional carb was calibrated for your application....now you will have to calibrate the AVS2 to your engine and application. I would have tried to fix the original carb or locate a good used core on eBay and rebuild it to replace the origional. I'm a proponent of maintaining originality where ever possible. Just my opinion of course.
                          BOB RENTON
                           
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