Vacuum trouble
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Joined: Nov 2008
Posts: 86
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From: Levittown PA
Vacuum trouble
Hi, just rebuilt my sb 350 with a comp cams roller cam, lift .502, .510 duration 276, 282 grind # s xr276hr-10. Did I kill the vacuum I need to operate my headlights and wiper? I don't have a vacuum gauge, but my wiper door and headlights don't operate. Any suggestions? Other changes where 650 CFM Holley, Edelbrock Performer, milled the heads and added oversized valves, 10:1 pistons and .003 overbore. Thanks for your help.
Pro
Joined: Jun 2004
Posts: 700
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From: Lantana TX
Hi, just rebuilt my sb 350 with a comp cams roller cam, lift .502, .510 duration 276, 282 grind # s xr276hr-10. Did I kill the vacuum I need to operate my headlights and wiper? I don't have a vacuum gauge, but my wiper door and headlights don't operate. Any suggestions? Other changes where 650 CFM Holley, Edelbrock Performer, milled the heads and added oversized valves, 10:1 pistons and .003 overbore. Thanks for your help.
No your vac should be fine with that cam. I would go get a gauge so you can establish a base line to work off of. Without a vac reading we cannot tell if you don't have a leak. Another words before you start trying to track down problems let's find out if it is even a leak in the first place.
Pro
Joined: Jun 2004
Posts: 700
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From: Lantana TX
I would expect to see at least 14"-16" of vac. One you get a base line start pulling hoses and pluging ports and see if the vac increases if you find one that does then you can easily trace the problem area.
Thread Starter
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Joined: Nov 2008
Posts: 86
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From: Levittown PA
Hi, got a vacuum gauge, I'm getting 14 lbs thru the check valve, 0 out of the vacuum tank. The tank must be leaking. Can I by pass this? I don't seem to be able to find anyone who sells these tanks. Any suggestions?
Pro
Joined: Jun 2004
Posts: 700
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From: Lantana TX
Burning Brakes
Joined: Jan 2006
Posts: 1,223
Likes: 174
From: Fort Wayne IN
You can bypass it, but none of your vacuum operated gizmos will work without the engine running.
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