ProCharger F-3R-121 Self-Contained Centrifugal Supercharger Head Unit with Splined Input Shaft & Threaded Volute - 2,400 HP - 3,100 CFM - 40 PSI Max Boost - Polished Finish - PC314A-121R-P
The ProCharger F-3R-121 Self-Contained Centrifugal Supercharger Head Unit is engineered for professional motorsports and extreme competition vehicles that require enormous airflow, outstanding durability, and proven race performance. Rated to support up to 2,400 supercharged horsepower while moving an incredible 3,100 CFM, the F-3R-121 is built for elite drag racing, radial racing, no-prep, offshore marine, land-speed, and other maximum-effort competition applications.
Capable of generating up to 40 PSI of boost, the F-3R-121 delivers massive airflow through ProCharger's high-capacity race compressor architecture. ProCharger lists the motor base horsepower recommendation for this model as CALL, allowing the head unit to be properly matched to highly specialized competition engine combinations.
Professional F-3R Race Configuration
The F-3R-121 is equipped with a splined input shaft and threaded volute, making it an excellent choice for dedicated crank-drive systems and professional race plumbing. These competition-focused features provide the strength, drive compatibility, and installation flexibility required for today's highest-horsepower race vehicles.
The compressor uses a massive 12-inch volute, 5.5-inch inlet hose connection, 4.8-inch inducer, 6.75-inch exducer, and a 4-inch outlet hose connection with a 3.59-inch outlet inside diameter. This high-capacity airflow package is designed for serious race engines where compressor airflow and efficiency are critical.
Self-Contained Race Lubrication
The F-3R-121 features ProCharger's proven self-contained lubrication system, eliminating the need for engine oil feed and return plumbing. Its dedicated 6-ounce Race Oil capacity reduces external plumbing while keeping supercharger lubrication and scheduled maintenance independent from the engine's oiling system.
The F-3R-121 incorporates a 5.63:1 internal step-up ratio, supports a maximum impeller speed of 72,000 RPM, and is available with reverse rotation. This provides additional flexibility when designing custom race chassis, crank-drive configurations, bracket systems, and belt routing.
Built for Extreme Competition
Every ProCharger F-3R-121 is manufactured using premium materials, precision machining, and race-proven engineering. Premium bearings, precision-ground shafts, a rugged gear case, and an advanced high-flow compressor design work together to deliver the durability required for the most demanding racing environments.
This listing is for the polished ProCharger F-3R-121 head unit with splined input shaft and threaded volute. Mounting brackets, crank drives, pulleys, belts, intercoolers, charge tubing, bypass valves, fuel-system components, tuning, and installation hardware are not included unless otherwise specified.
Features
- Supports up to 2,400 supercharged horsepower
- Maximum airflow rating of 3,100 CFM
- Produces up to 40 PSI of boost
- Motor base horsepower recommendation: CALL
- Splined input shaft
- Threaded volute
- Self-contained lubrication system
- 6 oz. Race Oil capacity
- 12-inch volute
- 5.5-inch inlet hose connection
- 4.8-inch inducer and 6.75-inch exducer
- 4-inch outlet with 3.59-inch outlet I.D.
- 72,000 RPM maximum impeller speed
- 5.63:1 internal step-up ratio
- Reverse rotation available
- Polished finish
Quick Specs
- Manufacturer: ProCharger
- Model: F-3R-121
- Part Number: PC314A-121R-P
- Product Type: Self-Contained Centrifugal Supercharger Head Unit
- Finish: Polished
- Special Features: Splined Input Shaft, Threaded Volute
- Maximum Supercharged Horsepower: 2,400 HP
- Motor Base Horsepower Range: CALL
- Maximum Airflow: 3,100 CFM
- Maximum Boost: 40 PSI
- Volute Diameter: 12 in.
- Inlet Hose Diameter: 5.5 in.
- Inducer Diameter: 4.8 in.
- Exducer Diameter: 6.75 in.
- Outlet Hose Diameter: 4 in.
- Outlet Inside Diameter: 3.59 in.
- Maximum Impeller Speed: 72,000 RPM
- Internal Step-Up Ratio: 5.63:1
- Oil Capacity: 6 oz. Race Oil
- Self-Contained Oiling: Yes
- Reverse Rotation: Yes
Published specifications are based on the ProCharger catalog. Actual airflow, horsepower, and boost depend on the complete engine combination, pulley ratio, crank drive, intercooling, fuel system, engine-management calibration, installation, and operating conditions.
Frequently Asked Questions
Why does ProCharger list the motor base horsepower as "CALL"?
The F-3R-121 is designed for highly specialized maximum-effort racing combinations. ProCharger recommends selecting this supercharger based on the complete engine package, operating RPM, airflow requirements, crank-drive ratio, intended boost level, and racing application rather than a fixed base horsepower range.
Does the F-3R-121 require engine oil feed and return lines?
No. The F-3R-121 uses ProCharger's self-contained lubrication system with a dedicated 6-ounce Race Oil capacity, eliminating the need for engine oil feed and return plumbing.
Why Buy from Beefcake Racing?
When building an extreme-horsepower race program, every component must work together as a properly matched system. Beefcake Racing can help you select the correct ProCharger head unit, crank drive, pulley ratio, fuel system, intercooler, bypass valve, and supporting components for a dependable competition forced-induction package.
Questions? Call 1-855-827-7223 or email sales@beefcakeracing.com.
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