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Next Gen Race Series Carbs are HERE! PROFORM is taking its popular carburetors and making them even better! Here are the NEW Features: Main Body: Completely new main body design with contoured venturis and new 2-step down-leg boosters. The combination creates better air flow and increased fuel atomization! Fuel Bowls: Completely new design with increased internal baffling and a lower fuel ramp. The metering blocks also have a new baffle designed to work in conjunction with the bowl baffles to reduce fuel slosh and increase control. Throttle Base Plate: Slabbed shafts for increased airflow are now standard! In addition to these new features are all the great features that define the Race Series from the competition. Hand assembled and dyno tested in the U.S.A. by racers for racers! All PROFORM Race Series Carbs include the following: PROFORM's innovative all-aluminum next-gen main body with adjustable screw-in air bleeds and torx head squirters. Billet aluminum throttle base plate that is fully adjustable for fine tuning, and won't warp. The throttle lever is compatible with Ford kickdown bracketry, and the secondary opening rate can be adjusted with a linkage kit (sold separately). The billet aluminum metering blocks have a new fuel baffle design that integrates with the fuel bowl float for better fuel control. The metering blocks are fully adjustable as they always have been. Lastly, the aluminum fuel bowls with sight glass windows and billet fittings are a new design that is optimized with new features for better fuel control and easy float setting.
Specifications:
| Air Bleeds Included | Yes |
| Air Bleed Material | Brass |
| 4708 | No |
| 6444 | 1.75 |
| 356 | 4 |
| 835 | 0.25 |
| 30 | No |
| 574 | No |
| 6443 | 1.875 |
| 4234 | Yes |
| 765 | 0.875 |
| 3390 | Performance |
| 353 | Yes |
| 4265 | Nitrophyl |
| 1968 | 4150 & 8090 |
| 4235 | Manual |
| 878 | Yes |
| 621 | Aluminum |
| 614 | 3.25 |
| 1385 | Silver |
| 1428 | 5.25 |
| 1427 | 5.25 |
| 857 | 4 |
| 6440 | 0.25 |
| 6431 | Yes |
| 6442 | 0.102 |
| 6441 | 0.087 |
| 1271 | Yes |
| 8783 | Square/4150 |
| 9324 | Mechanical |
| Primary Power Valve (Hg) | 4.5 |
| Feature/Benefit | Lightweight Aluminum Construction |
| Idle/High Speed Air Bleed Sizes | 70 / 35 |
| Needle & Seat | 120 |
| Ford Kickdown Bracket Included | No |
| Discharge Nozzle Size (Primary / Secondary) | .033 in. / .033 in. |
| Secondary Main Jet Size | 87.5 / .099 |
| Height (IN) | 3.25 inch |
| Fuel Line Inlet Distance | 9-11/16 inch |
| Air Bleed Size (Inner High Speed) | 35 / 35 |
| Primary Main Jet Size | 78 / .084 |
| Choke | No Choke |
| Number of Barrels | 4 |
| Air Bleed Size (Outer Idle) | 70 / 70 |
| Base Plate Material | Billet Aluminum |
| Booster Style | Down-Leg Boosters |
| Series | Race Series |
| Secondaries | Mechanical Secondaries |
| Calibration | Universal |
| Part Type | Carburetor |
| Metering Block Material | Billet Aluminum |
| Color | Natural |
| Material | Aluminum |
| Main Body Material | Lightweight Aluminum |
| Category | Carbs |
| Throttle Linkage | Universal |
| Fuel Inlet | Dual |
| Fuel | Gasoline |
| Flange Style | Square Bore |
| Finish | Vibratory Tumble Polished |
| Emissions | 49 State Legal |
| EGR | Without EGR |
| CFM | 850 CFM |
| Fuel Inlet Thread | 7/8-in. x20 |
| Description_ABR | Carburetor |
| Description_SHO | Carburetor - 850 CFM |
| Description_INV | Carb |
| Description_INV | Race Series - 850 CFM |
| Description_INV | Mech. Sec. |
| Description_DEF | Carburetor |
| Description_ASC | Engine Carburetor |
| Description_ASC | Race Series Model |
| Description_ASC | Gas |
| Description_ASC | 850 CFM |
| Description_ASC | Mechanical Secondaries |
| Description_LAB | Engine Carburetor |
| Description_LAB | Race Series Model |
| Description_LAB | 850 CFM |
| Description_LAB | Mechanical Secondaries |
| Description_DES | Engine Carburetor |
| Description_DES | Race Series Model |
| Description_DES | Gas |
| Description_DES | 850 CFM |
| Description_DES | Mechanical Secondaries |
| Description_EXT | Engine Carburetor |
| Description_EXT | Race Series Model |
| Description_EXT | Gas |
| Description_EXT | 850 CFM Dual Inlet 4-Barrel With Mechanical Secondaries |
| Description_EXT | Square Type Bore Mount |
| Description_EXT | Features Down-Leg Boosters and A Tumble Polished Finish |
| Description_EXT | No Choke |
| Description_EXT | Assembled With 100% New Components |
| Description_EXT | Sold Each |
| Description_MKT | Next Gen Race Series Carbs are HERE! PROFORM is taking its popular carburetors and making them even better! Here are the NEW Features: Main Body: Completely new main body design with contoured venturis and new 2-step down-leg boosters. The combination creates better air flow and increased fuel atomization! Fuel Bowls: Completely new design with increased internal baffling and a lower fuel ramp. The metering blocks also have a new baffle designed to work in conjunction with the bowl baffles to reduce fuel slosh and increase control. Throttle Base Plate: Slabbed shafts for increased airflow are now standard! In addition to these new features are all the great features that define the Race Series from the competition. Hand assembled and dyno tested in the U.S.A. by racers for racers! All PROFORM Race Series Carbs include the following: PROFORM's innovative all-aluminum next-gen main body with adjustable screw-in air bleeds and torx head squirters. Billet aluminum throttle base plate that is fully adjustable for fine tuning, and won't warp. The throttle lever is compatible with Ford kickdown bracketry, and the secondary opening rate can be adjusted with a linkage kit (sold separately). The billet aluminum metering blocks have a new fuel baffle design that integrates with the fuel bowl float for better fuel control. The metering blocks are fully adjustable as they always have been. Lastly, the aluminum fuel bowls with sight glass windows and billet fittings are a new design that is optimized with new features for better fuel control and easy float setting. |
| Description_FAB | Lightweight Aluminum Construction |