Below is a general manufacturer product group description. Please note the information below is not item specific. Item specifics are above in product details.

The nature of a vacuum pump is to remove air, blow-by gasses and other contaminants from the crankcase of an engine. The vacuum pumps ability to remove the air in the crankcase results in overall engine vacuum. Vacuum will increase horsepower by allowing the use of low-tension compression and oil control rings. In which the use of reduces frictional horsepower losses, blow-by, intake charge contamination and aids in detonation prevention. Moroso’s “purpose built” racing pumps offer all these advantages and more. Whether you have a normally aspirated Small Block or a nitrous equipped Pro-Mod, one of Moroso’s five vacuum pump offerings with all the needed accessories have you covered. These pumps will suit nearly any engine combination and requirement.
ORIGINAL DESIGN 3-VANE VACUUM PUMP


Versatile Billet aluminum design
Engineered vane material for improved efficiency and wear
Completely rebuildable in 15 minutes


ORIGINAL DESIGN 4-VANE VACUUM PUMP


Versatile Billet aluminum design, well suited for wet or dry-sump applications
Engineered vane material for improved efficiency and wear
Completely rebuildable in 15 minutes


ENHANCED DESIGN 4-VANE VACUUM PUMP


“Enhanced Design” pulls 13.9% more vacuum
Can be used efficiently on wet or dry-sump engines
Achieves greater vacuum sooner, virtually maintenance free
4-Vane design weighs less than “original” style pumps
Kit includes versatile mounting bracket, and -12AN fittings
Designed with maintenance-free precision sealed roller bearings
Pump No. 22644 is natural aluminum finish designed to be polished, interior hard coated for wear resistance


PRO-MOD STYLE LARGE CUBIC INCH ENGINES & BLOWER MOTOR PUMP


Large displacement creates incredible vacuum
Flows up to 150% more than Original Design
Can achieve up to 26 inches of vacuum
Utilizes sealed maintenance free bearings
Adjustable bracket and fittings included


VACUUM PUMP BRACKETS
Moroso offers Anodized Billet Aluminum Vacuum Pump Mounting Brackets that fit a variety of engine and vacuum pump combinations. These brackets fit the engines directly or mount to a motor plate. Refer to the listings.
BILLET ALUMINUM EQUALIZING PLATES WITH FITTINGS


Includes 1/8” NPT Fitting and –12AN Fitting
Allows the vacuum pump and vacuum gauge to be connected
Can also be used as a drain back location
Black Anodized


VACUUM PUMP LINE KIT


Includes 6 feet of steel reinforced hose, two 90 degree hose fittings and two –12AN straight hose fittings
Designed to simplify Vacuum Pump installation


BILLET ALUMINUM VACUUM RELIEF VALVES


Two styles allow fastening through valve covers (No. 22637) or threaded directly into lifter valley (No. 22636)
Vacuum relief point is adjustable by shimming an internal spring to get the precise amount of vacuum desired
Can be disassembled for easy cleaning and maintenance and works with any vacuum level
They are made of 6061 T6 Billet aluminum and have a clear, attractive finish


VACUUM PUMP REGULATOR


Regulator screws directly into vacuum pump’s -12AN inlet
360º directional adjustability
Prevents the need for drilling additional holes in the valve cover
Anodized – clear
Prevents pulling excess oil out of the crankcase