Moroso 22642 Enhanced Design 4-Vane Racing Vacuum Pump with Bracket

The Moroso 22642 Enhanced Design Vacuum Pump is a high-performance racing vacuum pump engineered to increase horsepower by creating crankcase vacuum in high-performance engines. This advanced 4-vane design is specifically built for large engines with power adders where maintaining proper ring seal is critical.

Key Features:

• Enhanced 4-vane design pulls 13.9% more vacuum than original 3-vane pumps
• Rated for 8000 RPM maximum speed—significantly higher than comparable pumps
• Manufactured from billet aluminum with black anodized finish
• Precision-machined shaft, rotor keyed to shaft, and sealed roller bearings
• Maintenance-free operation with virtually no routine service required
• Compact design: 4.375" O.D. body, 5.050" from back of pump to pulley mounting flange
• Includes adjustable billet mounting bracket for versatile installation
• Includes -12AN ORB inlet and outlet fittings with O-rings
• Compatible with both wet sump and dry sump oiling systems

Performance Benefits:

• Increases horsepower by improving piston ring seal and reducing friction
• Prevents blowby and intake charge contamination
• Aids in detonation prevention under high boost or nitrous applications
• Allows use of low-tension piston rings for reduced frictional losses
• More consistent and effective than header-mounted evacuation systems
• Builds vacuum quicker and maintains it longer under high demand

Recommended operating speed is 50% of engine RPM as a starting point, with adjustments made via pulley ratio selection. The mounting bracket fits Small Block and Big Block Chevrolet cylinder heads, motor plates, and various other mounting locations. A breather tank (sold separately) is required to catch oil residue during operation.

Note: Mounting hardware not included. Use only the supplied fittings or genuine Moroso replacement fittings (P/N 97641), as other brands will damage the unit.