Race-Q Series Carburetor 850CFM Drag Race


PART# RQ-850

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The RQ Series requires PART# 300-4145-1ALQFT to seal on a 4500 flange style intake manifold.


For competitive classes where every last hundredth of a second counts, Race Q-Series carburetors offer excellent performance, consistency, and tunability. Vacuum-drawn die-cast aluminum main bodies eliminate porosity and yield extremely precise tolerances. Scalloped, symmetrical throttle bore openings work in concert with recessed air bleed cavities to minimize flow restrictions, and specially contoured venturi provide a broad operating range. For added versatility, Race Q carbs utilize a dual-pattern billet throttle-body, making them compatible with both 4150- and 4500-style flanges. All Race Q carburetors feature billet metering blocks with five-stage changeable emulsions, as well as, throttle bodies with roller bearing seals to provide smoother operation, less wear on shaft, and longer life. •Race style aluminum main body with upgraded downleg race boosters •Screw-In airbleeds that have been recessed and moved out of the air way for less restriction •5-Emulsion billet metering blocks with screw-in bleeds for every circuit - fully adjustable •Lightweight aluminum fuel bowls with internal baffles, raised roof, re-designed fuel entry orifice and built-in sight windows •4-corner idle •Billet throttle body with roller-bearing sealed shafts that have been slabbed for added air flow, stainless steel throttle plates, and secondary adjustable cam bracket. Each throttle body is machined for both 4150 or 4500 style manifolds.


Billet ColorBlack
BoosterDown Leg
BrandQuick Fuel
Emission Code3
Fuel SystemCarbureted
High Speed Air Bleed33
Idle Air Bleed Size70
ModelRace-Q Series
Primary Main Jet78
Primary Power Valve45
Primary Pump Nozzle Size33
Product TypeCarburetor
Secondary Main Jet84
Supercharged ApplicationNo
Throttle Bore1-3/4 inch
Part NumberRQ-850

Service Parts


This part is legal for use on Uncontrolled (Non-Emissions Controlled) Vehicles or Racing Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

Racing Vehicles are vehicles that are used exclusively for racing or other forms of competition that are not registered and that may never be used on the street.

Tech Resources

The RQ Series requires PART# 300-4145-1ALQFT to seal on a 4500 flange style intake manifold.
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