Thread: crankcase pressure relief
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01-17-2008 10:55 AM #1
crankcase pressure relief
Hey guys, I am building a high hp/high torque sbc stroked to 383 cu in. I want to run without any breathers or pvc valves in my valve covers. I would rather not run a vacuum pump. I read in these pages about running pvc valves in the intake manifold. I did a couple of searches but no luck. Has anyone had success with this concept?
Thanks for any info.
peace Bud
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01-17-2008 12:31 PM #2
Originally Posted by Rgtrough
Buick Motor Car Company did pretty well with a PCV straight down through the intake manifold behind the carb and directly into the valley.
You don't want to plug into any runners or the plenum which are under a vacuum most times.
The PCV pulls crankcase air from the valley.
You'll probably need a baffle of some sort to keep from sucking the good oil out.
And a filtered air supply for air make-up into the valley.
Do a search for PCV etc.
It was covered in some depth within the last six months.Last edited by C9x; 01-17-2008 at 12:33 PM.
C9
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01-17-2008 05:20 PM #3
Seems to me I remember building an engine or two which had a PCV in the intake manifold tray. Pontiac?.
Education is expensive. Keep that in mind, and you'll never be terribly upset when a project goes awry.
EG
Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
MSD 8360 distributor vacuum advance