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  • Vacuum Pump Application Guide and Technical Notes - GZ Motorsports
    All engines create a certain amount of blow by (leakage of compressed fuel and air past the rings into the pan area) This blow by airflow creates a positive pressure in the crankcase, the vacuum pump "sucks" air out of the crankcase with its negative airflow
  • Getting More Horsepower with the Use of a Crankcase Vacuum Pump
    As an engine is running, some of the combustion gases will sneak past the rings and create pressure in the crankcase, which is called blow-by Smart drag racers for years have used vacuum pumps to help gain a few extra horsepower at the track by pumping that buildup of gas pressure back out of the crankcase
  • Crankcase Vacuum Pump - Hot Rod Forum
    You're not experiencing anything weird high RPM engines leak oil out of seams and seals thus all sorts of catch devices It might be helpful to pull a vacuum on the crankcase either with collector valves or an engine driven vacuum pump The front seal is a weak spot on the SBC
  • Evacuating crankcase gasses on boosted cars and more. . .
    Rather than putting a breather on the valve cover to let crankcase pressure out, pull the air out with a pump to create a vacuum Benefits of Negative Crankcase Pressure using an Electric Pump: 1) Prevents oil leaks from seals and gaskets by eliminating crankcase pressure 2) Reduces parasitic losses from pistons pumping against crankcase air
  • Pulling crankcase vacuum using exhaust flow - IW STi Forum
    In my version you just plumb into the exhaust and run a tube to the crankcase via the catch-can or air oil separator You use a easily found check valve and seal up the engine so there are no crankcase leaks No connections for vacuum from the intake or manifold! This is purely a racing application!
  • Tech: How External Vacuum Pumps Free Up Horsepower - Dragzine
    External crankcase vacuum pumps will provide significant power gains on both racing and high-performance street engines, primarily by promoting superior ring sealing It’s an engine-performance trick practiced since the late ‘60s, first with passive crankcase evacuation methods or so-called Pan-Evac systems
  • Vac Pump and Blowers? - Yellow Bullet Forums
    The turbocharged and supercharged, street car crowd have begun utilizing vacuum pumps to relieve the excess crankcase pressure caused by boost They also log their vacuum for clues to how their tune-up is working
  • Tech: Crankcase Pressure Control – Oil and Air Control
    One way to decrease blow-by and increase piston ring seal is to add an aftermarket vacuum pump Vacuum pumps work by creating negative airflow (vacuum) thereby pulling the air from the crankcase They are rated by their airflow capacity measured in cubic-feet per minute (CFM) and are available in a variety of sizes
  • The Pros and Cons of Racing Vacuum Pumps - Dragstuff
    Once the cars started running mufflers traditional pan evacuation systems (pan-evacs) no longer worked properly Racers started using vacuum pumps because air pressure in the pan started blowing oil out the gaskets and oil was leaking all over the place That's when GZ Motorsports got involved
  • Tech: Boost And Vacuum – Finding Hidden Horsepower - Dragzine
    Vane-type vacuum pumps, like the ones offered by GZ Motorsports or Moroso, use reciprocating flaps (vanes) to paddle the air through a cylindrical body to create a vacuum Connecting the body to the engine results in combustion gasses being sucked out of the crankcase and forced in to a puke tank





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