Vacuum pump setup questions..
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From: Port Tobacco, MD
Vacuum pump setup questions.. We're installing a pair of vacuum pumps next week and have a couple of questions and hope someone can help.
We're welding 2 -10 bungs on the valve covers and running each side to the vacuum pump and the exhaust side is going to a catch can with a filter on the top and a petcock on the bottom. Do you need to add a relief port on the valve cover so its almost like a controlled leak or just leave it sealed?
Phil
We're welding 2 -10 bungs on the valve covers and running each side to the vacuum pump and the exhaust side is going to a catch can with a filter on the top and a petcock on the bottom. Do you need to add a relief port on the valve cover so its almost like a controlled leak or just leave it sealed?
Phil
Here is mine. You can see the vacuum relief valve on the far right of the pic almost at the firewall.
http://www.torquecentral.com/attachm...chmentid=14645
http://www.torquecentral.com/attachm...chmentid=14645
One last post, you can get by with just the one bung on the passenger side cover. The vacuum across the motor will be consistant you dont need two.
I was alos told look at around 14-15" of vacuum at WOT
I was alos told look at around 14-15" of vacuum at WOT
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From: Port Tobacco, MD
Thanks for the reply. We're using sheetmetal valvecovers with 2 - 10 bungs on each side. I figured there needed to be either a filter or a relief plug to pull from.
Phil
Phil
We didn't use a valve relief on ours because the size of the pulley was so big we were told it was not necessary. We'll have a better idea after the dyno. We used one -12an line into the valley cover, and so far it is working great.
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Verdad Gallardo Thread Starter
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From: Port Tobacco, MD
Thanks, I figured it was a single plane intake. There is absolutely no room with the Fast or LS1/6 but I am going to find a solution. If you can take a pic it would be a great big help.
Originally Posted by Phil99vette
Is the valley cover steel or aluminum?
i have seen motors that had gasket sealing problems from running a vac pump with no relief valve... i cant call it first hand experiance though, since i didnt own or run any of the motors.
i would run one if it was my car... besides, after a specific point, the extra vacuum is just creating more drag with the pump...
