Product Description
These racing vacuum pumps are manufactured from billet aluminum and feature a precision-machined shaft, rotor, and bearings that will withstand the rigors of racing. They work by producing high crankcase vacuum, which increases power by improving ring seal, preventing blowby, and detonation. Allowing the use of lower-tension piston rings for less friction. These positive pumps are much more consistent and effective than header-mounted evacuation systems.
Original Design 3-Vane Vacuum Pump
Versatile Billet aluminum design
Achieves greater vacuum sooner
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
Part # MOUNTING BRACKETS
63909 Mounting Bracket, Big Block Ford, Driver or Passenger cylinder heads
63910 Mounting Bracket, All Engines, With a motorplate or Small and Big Block Chevy with Driver/passenger cylinder heads
63911 Mounting Bracket, Small Block Ford, Driver or Passenger cylinder heads
63912 Mounting Bracket, Big Block Chrysler, Driver side of engine block
63921 Mounting Bracket, Ford 4.6/5.4, OEM, Power Steering Pump Location
63922 Mounting Bracket, GM LS,Driver side cylinder head
63923 Mounting Bracket, GM LS,Passenger side cylinder head
GETTING THE MOST PERFORMANCE FROM YOUR VACUUM PUMPS
Moroso Vacuum Pump Nos. 22640 and 22641 can be driven no faster than 6500 RPM. The Moroso Vacuum Pump Nos. 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.
