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Street stock vacum pump ?
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HRE1
I watched NASCAR once
| Posts: 1
| Joined: 01/10
Posted: 01/04/10
05:28 PM
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Looking to see what people are using for vac pumps on a 355.
My class is alowing us to use one and I would like to know what to buy.
Thanks
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waynep7122
I watched NASCAR once
| Posts: 17
| Joined: 11/09
Posted: 02/17/10
01:01 AM
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i have a friend who was trying various vacuum pumps on one of his projects..
he ended up with an electric air injection pump off a newer gm...
he was really happy with it..
just an idea... i don't know if it's legal...
creative people might rig it up with an adjustable vacuum switch controlling a relay so it only runs when the intake manifold vacuum drops.. below idle levels.. so its not running all the time..
he and i were discussing a baffled can stuffed with chore boys as a oil trap mounted between the engine and the pump..
he did hook up a compound vacuum/pressure gauge to the valve cover to monitor the crank case vacuum... think the vacuum gauge /fuel pump pressure tester.. goes from 30 inches of vacuum to 15 pounds of pressure.. with 5/16 hose so it moves fast...
this is one gauge.. like i am talking about..
http://www.summitracing.com/parts/SUN-CP8203
but something like this is what he used. just to give you an idea...
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=93547
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