vaccum pump, modded pcv?
Thread Starter
Racer
Joined: Mar 2006
Posts: 464
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From: silverdale washington
vaccum pump, modded pcv?
Anybody running a vacuum pump or a diffrent type of pcv setup than stock. I got some ideas of my own, But just trying to see if anybody else has anything they have come up w/.
Safety Car
Joined: Apr 2004
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From: Hayward California
Supporting Vendor
Joined: Jul 2003
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From: http://www.mphparts.com 800-364-1975
I used to think the more vacuum, the better... but beware. Those of us experimenting with some check valves that work awesome, and are seeing 15-20inHg of vacuum in the crank case know... some vacuum is OK, too much vacuum is a problem.
Just be sure that whatever you go with is not capable of drawing too much vacuum or you will have other issues to contend with.
Just be sure that whatever you go with is not capable of drawing too much vacuum or you will have other issues to contend with.
Thread Starter
Racer
Joined: Mar 2006
Posts: 464
Likes: 0
From: silverdale washington
I bought the newer style valve covers w/ only one vent on each side. Then im going to run the 2 lines to a catch can w/ no pcv valves inline. Then coming out of the catch can you will have the 2 pcv valves inline w/ 2 lines going to throttle body and intake. Then in the catch can will be an adjustable minature vacuum relief valve. This way I can maintain 10-12" hg in the bottom end. And with the extra volume of the catch can it will almost act like a vacuum resevoir.
Safety Car
Joined: Apr 2004
Posts: 3,932
Likes: 8
From: Hayward California
I used to think the more vacuum, the better... but beware. Those of us experimenting with some check valves that work awesome, and are seeing 15-20inHg of vacuum in the crank case know... some vacuum is OK, too much vacuum is a problem.
Just be sure that whatever you go with is not capable of drawing too much vacuum or you will have other issues to contend with.
Just be sure that whatever you go with is not capable of drawing too much vacuum or you will have other issues to contend with.
http://www.gzmotorsports.com/vacuum-control.html
Arnel
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From: Valencia Ca
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From: Chandler AZ
Melting Slicks
Joined: Jun 2004
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From: Newark, DE
St. Jude Donor '06
Those 4 vane pumps get the job done. PM me if anyone needs details or has questions.
Last edited by Mr. Lucky; Dec 26, 2006 at 05:58 PM.
Drifting
Joined: Jul 2004
Posts: 1,321
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From: Dallas Texas
Funny ya'll mentioned this now but I just finished installing an electric vacuum pump that's triggerd by a hobbs switch. As soon as it see's boost at 2psi or more, triggers my vacuum pumps to come on. I'm trying to come up with a way to run one the vacuum pump at all times by lowering the voltage to it until it see's boost!! I'm all ears if someone has an idea to do that with. I'm still in the R&D research phase and have just a few bugs to work out. The only question I have for you guys is that where are you guys measuring the vaccum at?? I'm running a vented oil breather cap also but when the pumps come on, you can feel the draw on the oil filler neck pretty well. And the pumps are mounted in the battery tray area and looks pretty clean.
Shahram
PS...I didn't mean to hi-jack the thread.
Shahram
PS...I didn't mean to hi-jack the thread.
Former Vendor
Joined: May 2005
Posts: 3,749
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From: Valencia Ca
Funny ya'll mentioned this now but I just finished installing an electric vacuum pump that's triggerd by a hobbs switch. As soon as it see's boost at 2psi or more, triggers my vacuum pumps to come on. I'm trying to come up with a way to run one the vacuum pump at all times by lowering the voltage to it until it see's boost!! I'm all ears if someone has an idea to do that with. I'm still in the R&D research phase and have just a few bugs to work out. The only question I have for you guys is that where are you guys measuring the vaccum at?? I'm running a vented oil breather cap also but when the pumps come on, you can feel the draw on the oil filler neck pretty well. And the pumps are mounted in the battery tray area and looks pretty clean.
Shahram
PS...I didn't mean to hi-jack the thread.
Shahram
PS...I didn't mean to hi-jack the thread.
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From: Toronto Ontario
Rob.
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Charlie
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From: Chandler AZ
Last edited by Bill Reid; Dec 27, 2006 at 03:08 PM.
Thread Starter
Racer
Joined: Mar 2006
Posts: 464
Likes: 0
From: silverdale washington
Funny ya'll mentioned this now but I just finished installing an electric vacuum pump that's triggerd by a hobbs switch. As soon as it see's boost at 2psi or more, triggers my vacuum pumps to come on. I'm trying to come up with a way to run one the vacuum pump at all times by lowering the voltage to it until it see's boost!! I'm all ears if someone has an idea to do that with. I'm still in the R&D research phase and have just a few bugs to work out. The only question I have for you guys is that where are you guys measuring the vaccum at?? I'm running a vented oil breather cap also but when the pumps come on, you can feel the draw on the oil filler neck pretty well. And the pumps are mounted in the battery tray area and looks pretty clean.
Shahram
PS...I didn't mean to hi-jack the thread.
Shahram
PS...I didn't mean to hi-jack the thread.
Drifting
Joined: Jul 2004
Posts: 1,321
Likes: 0
From: Dallas Texas
Sounds cool post some pictures. You could leave the pump on all the time and put an adjustable vacuum relief valve inline w/ system. I bought newer style valve covers w/ only 1pcv vent on both sides. no fresh air breather. Also seales oil neck, This way the motor will seal. Then you can put a vacuum gauge in a valvecover or anywhere in sys thats sees pressure. Gauge is a good idea, If your over 15"hg or so you could be adversly affecting the oiling of wrist pins! Not worth a motor for the little gains youll see.
Shahram
Burning Brakes
Joined: Jul 2005
Posts: 779
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From: Bloomingdale Illinois
Pics and details of my electric crankcase evac system.... scroll down for pics
http://www.digitalcorvettes.com/foru...t=62128&page=2
http://www.digitalcorvettes.com/foru...t=62128&page=4
http://www.digitalcorvettes.com/foru...t=62128&page=2
http://www.digitalcorvettes.com/foru...t=62128&page=4
