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Carburetor options

931 Views 12 Replies 6 Participants Last post by  G-Force
I have a Holley Street Warrior that came on my Blueprint engines 306. I cannot get the thing dialed in. It runs incredibly rich. The floats were way high. I’ve brought them into adjustment. The mixture screws were at 1/4 and 1 and 3/4. I’ve put them both at 1 and 1/2. Still running really rich. The idle is high and the curb idle screw is backed off entirely. I turned the mixture screws in to 1 turn out on each with no real change. I haven’t used my vacuum gauge yet to tune for maximum vacuum. I checked everywhere for vacuum leaks and found none. I’ve been told to disconnect the Vacuum advance to help lower the idle. Clamped it shut with no effect. Going to call Holley tomorrow, but looking at other carb options. Anybody running an Edelbrock? What model and do you like it? Starting to wonder if my Holley is a Monday morning or Friday afternoon build. So far it’s used 5 gallons of gas to try to tune the carb and completely carbon fouled the first set of plugs to where it would no longer start. Starting to feel frustrated. Thanks
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I also run a Holley DP. Love them. I chased a similar problem (idle adjustment) for a long time. Finally just learned to live with it. Two summers ago I was changing to an open plenum spacer and had the carb on a stand on my bench. I was visually inspecting all the external linkage and discovered that the choke fast idle screw (the one you can't see behind the choke heater) was not in alignment with the fast idle cam face. This allowed the adjustment screw to go beside the cam. I would never have seen it while on the engine. A slight tweak with pliers and all my problems were solved. I am not saying this is your problem but I am saying the carb has many points of adjustment that have to work in unison to achieve the desired outcome. Before you tear into the carb make sure all the parts are working correctly. Been dealing with Holley carbs since I bought my first Corvette in 1966. I like them alot. PS: the Open plenum spacer made a HUGE difference in driveability. Good luck.

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