Page 29 of Avenger Systems & Carburetion by Holley Performance Products, Inc.

2-bbl keith dorton competition carburetors keith dorton 2300 hp carburetor features ˇ intended for short circle track racing ˇ choke hardware and related provisions are deleted for smoother air flow ˇ choke rod hole in main body is factory-sealed with a brass block-off plate to prevent unfiltered air from entering the carburetor ˇ pcv and other external vacuum tube sources are deleted ˇ straight-type accelerator pump nozzle design is used to prevent any possibility of fuel pullover and to reduce any chance of rich conditions at high rpm ˇ a plastic accelerator pump arm is used for more consistent operation ˇ 30cc accelerator pump gflt diaphragm is used for durability ˇ 50cc accelerator pump system has been eliminated from the 500 cfm carburetor it s been replaced with a user-friendly off-the-corner 30cc accelerator pump system ˇ power valve blow-out protection eliminates blown power valves ˇ welded throttle lever and shaft assembly is used for strength ˇ throttle plate screws are a low-profile buttonhead design secured with loctiteŽ ˇ screw-in type air bleeds are used to facilitate tuning ˇ hp metering blocks are reinforced specially designed for optimum atomization ˇ metering blocks have installed fuel slosh/vent baffles for superior fuel control during hard acceleration and braking conditions ˇ fuel bowl screw gaskets are made of nylon so they re reusable ˇ stainless steel throttle plates are used with drilled air bypass holes for smooth idle ˇ a metal cup plug in the throttle body shaft opening eliminates dust contaminates and unapproved air flow from entering the carburetor ˇ air cleaner mounting stud increased from 1/4 to 5/16 diameter for added strength and dependability 500 cfm carburetor ˇ sizes of throttle bore venturi booster diameter throttle plate thickness and throttle shaft diameter have not changed they comply and are fully consistent with the technical gauging now in use venturi casting rings are reamed to legal dimensions for more consistent air flow ˇ id numbers for carburetor and metering block are relocated for ease of viewing ˇ factory flow-tested to insure quality and reliability 2-barrel carburetors part 134-276 adjustable metering block for 2-barrel hp models 350 cfm two barrel features part 0-80787-1b ˇ metering block with changeable emulsion bleeds for infinite tuning 500 cfm two barrel features note eligible for nascarŽ use part 0-80583-1b ˇ hp metering block with non-adjustable metering tech line 270-781-9741 35

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