
Race-Series 750 CFM Gasoline Carburetor Mechanical Secondary
JEGS 555-16705 Race Series Carburetor Features:
- High-flow design with a streamlined main body, no air horn, and no choke tower, eliminating restrictions for improved airflow and throttle response
- Precision Hard Anodized metering blocks with fuel control baffling, changeable idle feed restrictions, and adjustable screw-in air bleeds for precise fuel delivery and easy tuning
- Performance throttle baseplate equipped with adjustable accelerator pump cams, power-valve blow-out protection, slabbed throttle shafts, and slip-link mechanical secondary linkage for smooth and efficient operation
- Advanced aluminum fuel bowls with internal baffles, a lower fuel ramp, and sight glass windows to ensure consistent fuel flow and easy float adjustment
- Versatile tuning options with a timed (ported) and 2 manifold vacuum ports for vacuum-controlled components
- Easy maintenance and upgrades with standard replacement and tuning parts
- Utilizes industry-standard jets, air bleeds, power valves, gaskets, and boosters
- Durable and stylish vibratory tumble-polished shiny finish
JEGS 555-16705 Race Series Carburetor Specifications:
- Mechanical Secondaries (Double-Pumper)
- Dual-Feed 7/8 in.-20 Fuel Inlets
- Includes (2) 7/8 in.-20 to -6 AN Adapters
- Includes (2) 7/8 in.-20 Plugs
- Can be Plumbed from Either Side
- Center-to-Center Spacing: 8 21/32 in.
- 4150 Square Bore
- Nitrophyl Floats
- 4-Corner Idle Adjustment
- Wet-Flow Tested
- 1-11/16 in. Butterflies
- 1.390 in. Venturi's
- Accelerator Pumps: 30 cc
- Primary Jet Size: 71
- Primary Needle and Seat: 0.110 in.
- Primary Discharge Nozzle Size: .031 in.
- Primary Power Valve: 4.5 Hg
- Primary Idle Air Bleed: 63
- Primary High Speed Air Bleed: 33
- Secondary Jet Size: 82 (w/Extensions)
- Secondary Needle and Seat: 0.110 in.
- Secondary Discharge Nozzle Size: .031 in.
- Secondary Power Valve: None
- Secondary Idle Air Bleed: 63
- Secondary High Speed Air Bleed: 33
JEGS 555-16705 Race Series Carburetor Notes:
- Carburetor Float Set at 6.5 PSI Fuel Pressure for Optimal Out-of-the-Box Performance
- Too Little Pressure Can Cause Fuel Starvation; Too Much Can Cause Flooding
- Recommend JEGS 555-15912 Fuel Pressure Regulator for Precise Pressure Control (sold separately)
- Universal Throttle Linkage is Compatible w/GM, Ford, Mopar Kickdown Cables
- Additional Adapters may be Required
- Compatible w/Innovate Motorsports Throttle Position Sensor 39300 or equivalent (sold separately)
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART
Race-Ready 4150 Double Pumper Carburetors for Maximum Power
Unleash maximum power with a JEGS 4150-Style Double Pumper Race Carburetor. Designed for serious racers and performance enthusiasts, these carburetors deliver instant throttle response and precise fuel control for high-RPM applications. Featuring multiple CFM options, dual accelerator pumps, dual fuel inlets, and tunable air/fuel circuits, they provide the adjustability needed to fine-tune your engine for peak performance. The square-flange bolt pattern ensures a seamless fit on any intake manifold with a 4150-style mounting, while the polished finish adds a race-ready look under the hood. Get the most out of your engine with a carburetor built for the track.



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