STAR Machine

24 VDC ELECTRIC VACUUM PUMP

The Star Machine GEN2 Electric Vacuum Pump (EVP) is representative of our continued efforts to provide racers with the latest vacuum pump technology. The EVP is a DC electric, reciprocating piston vacuum pump. It incorporates two dynamic seal pistons, coupled to a common yoke that is eccentrically driven in a common bore. The EVP offers the distinct advantage of ALL the HP gains, thru increased crank case vacuum, with ZERO HP lost to driving a mechanical vacuum pump.

Originally designed for Pro Stock Motorcycle to comply with the one pump rule it is also currently used in Pro Stock Car as a vacuum assist pump. In PSB applications it is equal to 5 times the capacity of the most commonly used pump to produce crank case vacuum. In PSB it is producing vacuum levels of 25 inches Hg.(wire to wire). In PS Car applications it has shown a 15 - 20 percent increase over existing crank case vacuum readings.

At Star Machine we realize that you do not get something for nothing. The electric motor driven EVP adds the requirement of between round battery maintenance (recharging). This will be considered, by some racers as a burden (one more between round headache). Other racers, looking for that last .01 second advantage, will view the additional maintenance as part of the game.


The EVP KIT is sold (complete) with two 24 VDC rechargeable batteries, 24V Charger, quick change (battery) holder, wiring harness and vacuum hose (6').

The use of other battery systems is not recommended and could lead to motor, wiring and mechanical
failures of the pump. While lithium-poly batteries may offer a weight advantage, they pose a true risk of fire.
Please contact Star Machine to discuss the application of alternate power sources.

The EVP operates (completely) separate from your existing (12/16 VDC) electrical system. To complete the EVP installation one 24V-75A normally open switch is also supplied to operate the pump. (We recommend switching the positive side) The pump is normally supplied with -12 A/N fittings manufactured from 7075. Call for optional fitting possibilities.

Activating the pump is presently (and recommended) done when the vehicle is pre-staged. In most cases at the same time the data recorder is switched on. This will guarantee the pump motors will receive the maximum available battery power.

The vacuum line connection to the engine is critical to the operation of the EVP. Drawing excessive amounts oil into the EVP may result in damage to the reeds. Care must be taken to baffle and/or separate the engine oil from the air drawn by the pump. More important to the performance of the pump is the sealing of the engine, the better the seal the higher the potential vacuum. If required, a regulator (STR.04.12.000) can be added directly to the pump.

Now that you have tightly sealed the engine to achieve vacuum in most cases there is no (sealed) provision to add engine oil. Check out our sealed Oil Fill Cap STR.09.08.000 (See: Products:Fittings/Hoses)


Mass: GEN2 EVP (Pump only): 3250 gms./7.16 lbs.
Mass: GEN2 EVP Kit with:
1 GEN2 EVP (3250 gms), 1 battery (1400 gms), battery mtg. block (225 gms), 6' hose (620 gms), 4 fittings (225 gms), baffle fitting (55 gms) and vacuum regulator (125 gms): Total = 5900 gms./13 lbs.