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Quick Fuel Q-850-AN

Q-Series 850cfm Drag Race Carb Annular

Quick Fuel Q-850-AN

Part Number: 793-Q-850-AN

Q-Series 850cfm Drag Race Carb
  • Annular
  • $847.48
    FREE Shipping
    To order this item contact Customer Service at 1-800-345-4545.


    Fuel Inlet
    New Or Remanufactured
    Booster Type
    Tumble polished
    Carburetor Flange
    Square bore
    Ford Kickdown
    Primary Inner Air Bleed Sizes Included
    Primary Jet Size
    Primary Outer Air Bleed Sizes Included
    Primary Power Valve (Hg)
    4.5 Hg
    Sold individually
    Secondary Inner Air Bleed Sizes Included
    Secondary Jet Size
    Secondary Outer Air Bleed Sizes Included
    Secondary Power Valve
    Secondary Type
    Throttle Linkage Type

    Performance & Value

    Main Body
  • All aluminum (upgrade from existing designs)
  • Tumbled finish for a high luster that protects against contaminants
  • Recessed air bleeds out of air stream to improve airflow
  • Raised accelerator pump squirter nozzle boss also out of air stream to reduce the possibility of high-speed pullover or "dribbling"

    Metering Blocks
  • CNC-machined from solid aluminum
  • 4 stages of emulsion help break up solid fuel for leaner air/fuel sooner & excellent throttle response
  • Stainless steel idle mixture screw with a superior nylon seal that won't deteriorate over time like cork
  • Machined internal passages (vs. die-cast cored holes) ensure consistent performance and almost no chance of porosity holes cross-talking between passages
  • 4-corner idle system for fine-tuning even with extremely long duration camshafts

    Throttle Body
  • CNC-machined from solid aluminum for a more stable platform than die-cast equivalent
  • Teflon-coated throttle shafts with Teflon ribbon bearings reduce rotational resistance and nearly eliminate the use of the throttle body shaft hole as a bushing (great protection in dirt environments)
  • Mechanical secondary carbs have the Quick Link Secondary Opening System that enables rate adjustment simply by changing links (available opening rates: 40%, 60%, 1:1)
  • Mechanical secondary carbs also have adjustable secondary airflow cam brackets that allow better idle tuning with race-oriented camshaft profiles

    Fuel Bowls
  • Die-cast aluminum for cooler fuel resulting in fewer fuel percolation problems
  • Sight glass to monitor fuel level without risking fuel spillage
  • All standard service replacement parts accepted
  • Floats based on application, i.e. Drag Race Carbs have notched floats & secondary jet extensions

    Vacuum Secondary Carburetors
  • Exclusive billet secondary housing cover
  • Cover has an integrated screw that allows timing & opening rate adjustments with just a simple turn
  • Adjustable housing offers much finer tuning to dial-in application

    Q-Series Mechanical Secondary Carburetor Kits include:
  • Quick Fuel Q-Series Drag Race Carb (650, 750, 850, 950, or 1050 cfm)
  • JEGS Dual Inlet Fuel Line Kit #555-100822
  • JEGS Fuel Pressure Gauge 15 psi #555-41010

  • Q-850-AN - Quick Fuel Q-Series Carburetors is rated 5.0 out of 5 by 1.
    • 2016-08-31T08:44CST
    • bvseo_cps, prod_bvrr, vn_cps_3.3.0
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_1
    • loc_en_US, sid_10001_10001_676685, PRD, sort_relevancy
    • clientName_jegs
    Rated 5 out of 5 by from Worth it! I have been using this carburetor for a couple of months and have had no disappointments. This carburetor is a replacement for a Holley 750. I'm using it on a well prepared 408 BBC. It needed slightly different jets to tune it and your normal set up procedures which is extremely easy to do with this carb. While changing the jets I noticed the machined surfaces were finished well WITHOUT a bunch of sharp edges or loose metal shavings everywhere. The throttle response is very crisp and has no hesitations what so ever. The engine now has consistent idle quality even with only 8 in hg vacuum. The engine now pulls extremely well. My 31X16X15 M/T tires won't hold now. It's like night and day difference.
    Date published: 2016-03-19
    • 2016-08-31T08:44CST
    • bvseo_cps, prod_bvrr, vn_cps_3.3.0
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_1
    • loc_en_US, sid_10001_10001_676685, PRD, sort_relevancy
    • clientName_jegs
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