SSB-28146 $300

Vacuum Pump, Street Use, Electric, Kit

The perfect solution for low vacuum.
These Stainless Steel Brakes electric vacuum pump kits are designed for use with a supercharger or big camshaft. They include a 12 V electric vacuum pump to supply your brake booster with the required power for brakes or other sources.

CLP-12VVCP $360

Vacuum Pump, Street Use, 12 V Electric, Kit

No vacuum? No Problem.
These Classic Performance 12 volt electric vacuum pump kits are designed to produce the vacuum that is required to operate power brakes. They mount inline between the intake manifold and the power booster. The pumps are internally regulated to turn on when vacuum drops below 15 in. of vacuum, and to shut off once it reaches 25 in. of vacuum. These kits include the vacuum pump, vacuum hose, and all necessary mounting hardware.

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$500 to $800

The ultimate in brake power boosters.
These Power Brake Service Hyrdoboost brake booster systems are powered by pressure from the power steering pump, and can generate 1,200 to 2,000 psi to the brake calipers. They require no vacuum, allow for increased firewall and motor clearance, and can accept either stainless steel braided or standard rubber hoses. The booster is available in your choice of natural, black powdercoated, silver powdercoated, or chrome finishes. The systems are available with or without the master cylinder; systems including the master cylinder have a reservoir and cap to complete the installation.

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GZ pumps generate more vacuum, flow more air and are more reliable. You won't be needing to take ours apart all the time to clean it! Our carbon fiber vanes with Rulon wipers seal better than anything else available which translates to less overall operating cost for your race car. Another feature you'll like is that they cost less than others, that's right, you get more pump for less money...

Click for larrger picture About $300 Pump only to $700 Complete Kit

Vacuum Pump Air Flow Tests

How much does a Vacuum Pump flow?

We conducted some in-house testing to see how much our pumps flow at different RPM's, and how they stack up against our competitors during the same test conditions. Since we test each pump for airflow when it is manfactured, it was a simple issue to modify our test bench for variable rpm to simulate actual crankshaft speeds. Here's what we learned...

Test Conditions

All tests were done on the SUCTION (inlet) SIDE (just like in an engine) using #10 inlet and outlet fittings with #10 inlet hose and outlet hose. Results could vary with larger or smaller fittings and hose.

Tests done from the outlet side indicated a higher cfm rating which does not appear to be applicable to creating suction or vacuum. All tests were done at a physical elevation of 3200' above sea level. Sea level measurements would tend to be higher. All RPM's are actual pump rpm, not engine rpm. To compute engine rpm divide the pump pulley diameter by the crank pulley diameter and multiply times the pump rpm. For example a 5.5" dia pump pulley divided by a 3.5" crank pulley = 1.571 X 3500rpm = 5500 Engine RPM. The same pulley sizes and RPM's were used for all comparisions.

Test Data Values

Pump

RPM
(Pump)

"Hg

CFM

GZMS VP101 Sportsman
1900

16

14

2500

18

16

3500

21

22

4900

21

GZMS VP103 Pro
1900

20

17

2500

21

22

3500

23

26

4900

29

GZMS VP104 Super Pro
1900

21

19

2500

23

24

3500

25

28

4900

31

Moroso 4 Vane #22641
1900

17

12

2500

18

16

3500

21

20

4900

22

Mr Gasket Sportsman
1900

17

12

2500

19

13

3500

19

14

4900

17

AeroSpace 3 Vane
1900

8

11

2500

10

14.5

3500

No Data

20

4900

No Data

As you can quickly see, there are some big differences in air flow between the different models and brands of pumps. To learn what size of pump you need on your car

Naturally Aspirated
Dyno Test Results

Without Vacuum Pump With Vacuum Pump

762ft lb@5100 772ft lb@5100

865hp@6700 890hp@ 6800

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Hot Rod Magazine test a Moroso Racing Vacuum Pump on a 381 de-stroker 400 small block Chevy making well over 600BHP.

The gained 25 to 30 BHP! The gains were consistent throughout the entire power curve.

The pump draws about 10 inches of peak vacuum through the crankcase and spits any oil fog that it picks up into a vented puke tank. By inducing a vacuum in the crankcase, which would otherwise have some positive pressure, it helps the compression rings seat against the ring lands on the pistons rather than warble in the grooves. Ring-to-piston sealing is as important as ring-to-wall. The resulting improvement in combustion-pressure retention induced the horsepower gains.

The system was driven by a belt from the crank.

By disconnecting the pump vacuum line from the motor, it was found the pump draws about 8 horsepower to drive the pump, meaning if the pump was electrically driven the power gain would be closer to 40BHP.

Extra vacuum increases power by improving ring seal and preventing blow-by, intake-charge contamination and detonation; and by allowing the use of low-tension piston rings for less friction. Moroso's "purpose-built" racing pumps offer all these power advantages and more and are your best alternative over the passenger car "smog pumps" that are being offered by others for race applications. Moroso offers four different model pumps and all the accessories you'll need for your install. These pumps will suit any engine combination and requirement.

Original Design
Racing Vacuum Pumps No. 22640 $400

Pulls Much More Vacuum Than Stock "Smog" Pumps
Available in 3 or 4 Vane Design
Billet Aluminum Housing
Special Vane Material for Improved Seal and Wear
Special -12AN Inlet/Outlet Fittings Won't Leak
Completely Rebuildable in 15 Minutes
Bracket (Available Separately) Bolts Directly to Big and Small Block Chevy Heads and Any Motor Plate

Original Design
Racing Vacuum Pumps No. 22641 $450

Enhanced Design
Racing Vacuum Pump No. 22642 $600

4 Vane Pump Weighs 12 oz. less than "Original Style" Racing Vacuum Pump
Pump is 1" shorter than original design
New design pulls 13.9% more vacuum
Achieves greater vacuum sooner
Rotor is keyed to shaft, eliminating fastener failure
Contains maintenance free precision sealed roller bearings
Kit includes Pump, Billet Adjustable Bracket and Special -12AN Inlet and Outlet Fittings
Bracket will mount to front or rear of pump and will allow 360 degree rotation before fastening for choice of inlet/outlet location
Mounts to motor directly or to motor plate in the same holes as "Original Syle" Moroso Vacuum Pump*
*Note: Belt length may change depending on mounting location. New belt may be required

4-Vane Vacuum Pump
"Pro Mod" Style
Large Cubic Inch
And Blower Motors No. 22643 $760

Originally Posted by 106mm

In racing applications, I've seen electric vacuum pumps show up to 20 HP increases. They produce MUCH more vacuum than a crankcase evacuation system and maintain it through the entire RPM range, though.