Increase Crankcase Vacuum
Extra vacuum boosts power by: improving ring seal; preventing blow-by, intake charge contamination, and detonation; and allowing the use of low-tension piston rings for less friction. These purpose-built vacuum pumps offer such power advantages in three designs to accommodate any engine combination and requirement. Use Moroso replacement pump fittings only. Moroso Vacuum Pump FAQs.
Original3 or 4-vane pumpBillet aluminum housingPulls much more vacuum than stock smog pumpsSpecial vane material for improved seal and wear-12AN inlet/outlet fittings won't leakRebuildable in 15 minutesMounting bracket sold separately (bolts directly to small or big block Chevy heads & any motor plate)
Enhanced4-vane pumpAnodized or natural exteriorPulls 13.9% more vacuum and does so soonerWeighs 12 oz less and measures 1" shorter than Original designSealed, maintenance-free bearingsMounting bracket and -12AN fittings includedBelt length may change depending on mounting location (new belt may be required)
Pro Mod4-vane pumpAchieves much greater vacuum soonerFlows up to 150% more air volume at low RPMsCapable of up to 26 inches of vacuumRotor is keyed to shaft, eliminating fastener failurePump weighs 7 lbs, 8 oz (with bracket and fittings)Sealed, maintenance-free bearingsBillet bracket and -16AN beaded fittings included (bracket mounts to motor plate & rotates 360°)
For small or big block Chevy, a Racing Vacuum Pump EZ Complete Kit includes:
Moroso Original 3-Vane Racing Vacuum Pump #710-22640Moroso Vacuum Pump Mounting Bracket #710-63910Moroso Gilmer 28-tooth Pulley #710-64886Moroso SB (#710-63845) or BB-Chevy (#710-63844) Vacuum Pump Drive KitMoroso -12AN Valve Cover Fitting #710-22635JEGS Remote Oil Breather Tank #555-52200JEGS -10AN to -12AN Hose Adapter #555-110168JEGS -12AN Straight Swivel Hose Ends #555-100004JEGS -12AN 90° Swivel Hose Ends #555-100024JEGS -12AN Pro-Flo Braided Hose #555-100941
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