GETTING THE MOST PERFORMANCE FROM VACUUM PUMPS: Moroso Vacuum Pump PN: 22640 and 22641 can be driven no faster than 6500 RPM. The Moroso Vacuum Pump PN: 22642 and ­­­22643 can be driven as high as 8000 RPM. Moroso offers many ratio options for two reasons. First, by spinning the pump fast enough to achieve the desired vacuum at staging RPM is critical to getting the most performance from your vacuum system. Typically the amount of vacuum it makes below your staging RPM is not as important as it is when you are under a load and ready to make your run. Second, with engines that either run on alcohol, are supercharged or turbocharged, having the pump spin to maximum RPM to maintain vacuum is necessary in some cases. This will decrease the life of the pump, but will achieve the desired results.

• Versatile Billet aluminum design
• Engineered vane material for improved efficiency and wear
• Completely rebuildable in 15 minutes
• Mounting bracket not included
• 4.150 O.D. body, 5.050 from back of pump to pulley mounting flange.

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Information:

Versatile Billet aluminum design; Engineered vane material for improved efficiency and wear; Completely rebuildable in 15 minutes; Mounting bracket not included; 4.150 O.D. body, 5.050 from back of pump to pulley mounting flange; PN: 22645 3 Vane Vacuum Pump Vane Kit is an AVAILABLE OPTION; MOUNTING BRACKETS: PN: 63909 Mounting Bracket for Big Block Ford (Driver or Passenger cylinder heads), PN: 63910 Mounting Bracket for All Engines (With a motor plate or Small and Big Block Chevy with Driver/passenger cylinder heads), PN: 63911 Mounting Bracket for Small Block Ford (Driver or Passenger cylinder heads), PN: 63912 Mounting Bracket for Big Block Chrysler (Driver side of engine block), PN: 63921 Mounting Bracket for Ford 4.6/5.4 OEM Power Steering Pump Location, PN: 63922 Mounting Bracket for GM LS (Driver side cylinder head), PN: 63923 Mounting Bracket for GM LS (Passenger side cylinder head); REPLACEMENT PARTS: PN: 97641 -12AN Replacement Fittings, PN: 97180 Original Design Pumps Rebuild Kit, PN: 22626 -16AN Replacement Fittings.