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Thread: Vacuum Pump and How they help LS engines.

  1. #1
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    Default Vacuum Pump and How they help LS engines.

    Vacuum Pumps: What Are They and How Can One Help Your LS Engine?

    by Clifton Klaverweiden on August 6, 2012

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    Most late-model GM enthusiasts spend their time thinking of ways to stuff more air into their engine, rather than pull it out. Yet that is exactly what a vacuum pump is designed to do, and it can help you keep your piston rings sealed better, keep oil out of your intake, and even make more power.
    All engines will have some amount of blow-by, or compressed air, exhaust gasses, and unburned fuel that sneaks past the piston rings during the compression process. High performance and racing engines are particularly prone to blow-by, and serious pressure can begin to build up inside the crank case – not a good thing for power production or efficiency. To get rid of crank case pressure, most engines are equipped with some kind of “positive crankcase ventilation” (or PCV) system that uses the vacuum created by the engine’s intake tract to suck the excess pressure out of the crank case. It’s a great idea in theory, but all that oily air that’s now making its way into your intake will eventually start to condense and a nice oily build up will start to form. LSx engines are notorious for getting a ton of oil in the intake manifold thanks to the PCV system, and creating yet another situation where power production could be reduced.
    That’s where a belt driven Vacuum Pump like those from GZ Motorsports can come into play. A vacuum pump is meant to replace your LS’s PCV system and can more effectively pull the pressure from the crankcase, help your piston rings seal better, and never let a drop of oil get into your intake tract. GZ’s Vacuum pumps bolt right to the heads of your LS engine, and are driven by a cog that replaces your stock tensioner pulley, and is plumbed to a custom billet replacement oil fill cap where the crankcase pressure will be pulled from. The oily air pulled from the crankcase is then plumbed to a double baffled aluminum breather tank. Their vacuum pumps can pull up to 33 CFM of positive pressure from your crankcase and can even be adjusted to your engine’s specific needs. For more info on their LSx vacuum pumps check out GZ Motorsports website, or give them a call at 209-296-3793.
    2001 Corvette - Heads, Cam, Intake, Full exhaust, Hotchkiss Swaybars, z06 brake ducts, SS brake pistons & Lines Etc. Lowered & Murdered out.
    2000 Trans AM WS6 - Forged Motor APS Twin Turbo Kit. Full Suspension & C5 brakes.... in pieces currently
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  2. #2
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    Default Re: Vacuum Pump and How they help LS engines.

    Hmmm. Interesting.



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  3. #3
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    I plan to expound on this when I get time. The air pump can be used as a vacuum pump on our cars.
    2001 Corvette - Heads, Cam, Intake, Full exhaust, Hotchkiss Swaybars, z06 brake ducts, SS brake pistons & Lines Etc. Lowered & Murdered out.
    2000 Trans AM WS6 - Forged Motor APS Twin Turbo Kit. Full Suspension & C5 brakes.... in pieces currently
    1998 Trans AM STS Turbo
    1997 Jeep Cherokee - when you just gotta go places other things won't take you.
    1995 Mercury Grand Marquis - ugly but comfortable

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    Quote Originally Posted by Stevec5ws6 View Post
    I plan to expound on this when I get time. The air pump can be used as a vacuum pump on our cars.
    Now this I want to learn more about.

  5. #5
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    Default Re: Vacuum Pump and How they help LS engines.

    I'm going read this when i get to work later today as reading material to give me something to do.
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  6. #6
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    Default Re: Vacuum Pump and How they help LS engines.

    Great article, I just trashed my air-pump because I needed the space and did not feel that there was a great need. I know other guys who have problems with LS1 crank case pressure. I like the way GZ has fitted the vacuum pump on the engine. Can you tell me what the rough cost is. thx

  7. #7
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    The gz for the kit is $830-$959
    2001 Corvette - Heads, Cam, Intake, Full exhaust, Hotchkiss Swaybars, z06 brake ducts, SS brake pistons & Lines Etc. Lowered & Murdered out.
    2000 Trans AM WS6 - Forged Motor APS Twin Turbo Kit. Full Suspension & C5 brakes.... in pieces currently
    1998 Trans AM STS Turbo
    1997 Jeep Cherokee - when you just gotta go places other things won't take you.
    1995 Mercury Grand Marquis - ugly but comfortable

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