BBC GZ Sportsman | Complete Vacuum Pump Kit | Street/Strip

When you're building or fine-tuning a high-performance engine, every part matters. A vacuum pump is one of those power-adders that can make a real difference. By pulling excess air, oil vapor, and pressure out of the crankcase, it improves ring seal and reduces drag, freeing up horsepower that would've been lost to windage. Plus, it helps keep your oil cleaner and your engine breathing better. If you're serious about performance, adding a vacuum pump to the setup is a smart move—just what you need to keep everything running tight and fast.

Can be used on driver or passenger side.

Everything you need in one box

• VP102 22 cfm Sportsman Vacuum Pump
• 4.5" OD V belt vacuum pump pulley
• CP Series fixed single groove crank pulley
• BT3 aluminum baffled breather tank
• -10 AN clear braided vacuum hose
• Hose for one valve cover
• -10 Fragola Push-Lite AN fittings for one valve cover
• Dayton top cog belt
• VCV101B vacuum control valve
• UPVM style mounting bracket, spacers and mounting bolts

Features

• Polished Aluminum Case
• -10 AN Fragola fittings
• Carbon Fiber Vanes
• Rulon Wipers
• Manufactured in the USA 🇺🇸
• Long lived pump, oil mist pass-through system.
• NO requirement for cleaning before each trip to the racetrack.
• Tested to ensure quality on a "pump dyno" with a vacuum gauge and a volumetric gauge on the suction side.
• Test vacuum @3500 rpm and date of assembly are noted on the front of the pump

Skip White Performance Testimonial

We use a vacuum pump kit for our in-house dyno testing. The vacuum pump kit in the picture shown above has been used to test over 1,200 engines over four years and is still going strong.

What makes GZ Pumps Different?

While most vacuum pumps may appear to work the same, the fact is that there are major differences on the inside, where it counts. The recently redesigned Pro Racing Vacuum Pump is a purpose-built pump specifically designed for the hot, wet, and oily environment found in race car crankcase vapors.

An all-new die-casting, only available from GZ Motorsports, forms the core of the new pump with much closer tolerances than previous models, enhancing its airflow potential. Closer tolerances in the new die-casting allow the Pro Pump to generate 26% more airflow than similar-sized competitors' pumps! Updates also include improved and beefed-up port locations, totally rebuild-able bearing sections, and long-life wipers.

As with all GZ Vacuum Pumps, Rulon Wipers are still used exclusively, as Rulon is the best material we've found to use for tough, hot, and oily applications. In fact, this pump can suck in and spit out anything but metal without sticking! In fact, recent durability testing we've conducted with our new extended life wipers proved that this pump can run 500 hours at 3500 RPM with a light oil mist and still maintain full vacuum! Compare that service life with any other brand pump and you'll find nothing else comes close to lasting that long.

With GZ Motorsports Vacuum Pumps, there is no need to spray brake cleaner into the pump between rounds to keep the internal vanes from sticking, a necessity with all other brands of pumps because they aren't designed to run in an oily atmosphere. Unlike the others, GZ pumps use a proven vane design that doesn't stick!

Quieter Operation... Want to run a vacuum pump on a street car? You don't want an annoying click-click-click to give away what you have under the hood. GZ Motorsports vacuum pumps are much quieter than the competition. Their pumps make a loud clicking sound as they rotate when they work correctly. GZ operates quietly and stealthily under your hood without annoying clicks.

GZMS pumps are manufactured in our shop in Glencoe, CA. After assembly, each pump is tested on our pump dyno at 3500 rpm. During testing, Red Line racing oil is run through them, so when you get your pump you will see "blackened" oil at the inlet and outlet ports. This is normal and due to the break-in process. GZMS vacuum pumps all show the test vacuum and date tested on the part sticker on the pump.

Technical Information

GZMS vacuum pumps are designed to have oil pass through them and require oil for lubrication of the wipers at the vanes. Experience has shown that synthetic oil yields a longer pump life. A dry pump will wear out prematurely due to friction between the Rulon wipers and the carbon fiber vanes.

GZMS vacuum pumps are warranted for one year with proper use. If a pump is returned that has been run dry, any warranty is void.

GZMS products are installed and used by others; no warranty is made as to the use of products regarding performance or safety. Motorsports are inherently dangerous. The user of GZMS products assumes all potential risks in using those products.

Pulley ratio is typically 64% of crankshaft speed. This is generated by using a 3.5" Crankshaft Pulley and a 5.5" Pump Pulley unless noted otherwise with a maximum pump rpm of 6000. GZMS Sportsman vacuum pumps are successfully run at higher RPMs; however, this is not recommended.

GZ Motorsports pumps may pull in excess of 20 in. hg. of vacuum; therefore, a vacuum relief valve is likely necessary.

Please consult your engine builder for the proper vacuum level for your engine. If you're not sure how much to run, it is generally considered safe to limit total vacuum to 10 - 12 in. hg., but there are varying opinions on running more than that, depending on engine setup, possible oil pressure drop, etc. Many competition engine builders will run up to or over 20" when the engine is designed for those levels.

For high output power adder engines, we highly recommend the use of a data logger to monitor vacuum levels down-track. In general, vacuum should increase the longer the engine runs, and as the engine RPM climbs. If piston rings start to have problems, such as if engine timing is excessive, a loss of vacuum tends to occur due to the increased blow by when ring seal is compromised. You may find a benefit to not running a vacuum relief valve at low levels in this situation if you want to observe this occurring, as a relief valve may mask this early warning signal that may be caught by a data logger of ring seal issues.

In all-out competition, where engines are run on the edge, closely setting pump RPM to limit vacuum to the level desired may be preferable to limiting vacuum with a relief valve in order to help observe ring seal problems. This is something that should be discussed with your engine builder and or tuner.

The vacuum your engine will make is dependent on the amount of blow by it generates and any air leaks it may have. No two engines are identical.

Ring Packages such as low tension rings typically generate an increase in ring blow by requiring a larger, or faster spinning pump.

Power Adders such as Nitrous Oxide, Superchargers, and Turbochargers all increase cylinder pressure generating increased ring blow by requiring a larger or faster spinning pump. The amount of Nitrous you are spraying, or the amount of boost you are generating increases the needs for a larger or faster spinning pump. Large Displacement engines typically generate proportionately larger amounts of blow by.

The use of alcohol, especially in a "rich" condition, generally reduces net vacuum and could require a slightly larger pump than a gasoline engine.

Vacuum leaks in the crankcase, valve covers, distributor base, timing chain cover, oil dipstick, etc., reduce the amount of vacuum you will generate. You can easily check your engine by pressurizing it with air. Be careful though, you don't need much to find leaks and you could damage gaskets and seals.

If you are going to continue to use a dipstick, consider removing the dipstick while running the car and covering the dipstick tube opening with a rubber vacuum plug to seal the tube off. That way you can eliminate leakage, but still pull the plug and check your oil level when need be.

All engines are different depending on how fresh they are, how much ring end gap is used, cylinder prep, and ring design. This is a general guide based on typical engines GZMS has fitted over the years as well as customer reports.