pvc/crank case pressure the next level.
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TECH Senior Member
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From: Columbus, ohio
pvc/crank case pressure the next level. well keeping the pvc tread going, and into the next level.
ok things learned
1. can't route it back into the intake due to crankcase pressurization and concern of oil fluids getting into intake.
2) need to draw vacuum to evacuate gasses and seal rings better. constant vaccum would be the best.
Now high HP race cars have belt driven or electric pumps to draw a vaccuum. I tried the air vac we have on our cars to modifiy it and it seemed like it wasnt powerfull enough to work.
What pumps are available?
also i have heard of another method of plumbing a 45* tube into the exuast as it will pull the crank case gasses and discharge them through the exhaust.
any thoughts of this.
im getting alot of crank case pressure i need to take care of.
ok things learned
1. can't route it back into the intake due to crankcase pressurization and concern of oil fluids getting into intake.
2) need to draw vacuum to evacuate gasses and seal rings better. constant vaccum would be the best.
Now high HP race cars have belt driven or electric pumps to draw a vaccuum. I tried the air vac we have on our cars to modifiy it and it seemed like it wasnt powerfull enough to work.
What pumps are available?
also i have heard of another method of plumbing a 45* tube into the exuast as it will pull the crank case gasses and discharge them through the exhaust.
any thoughts of this.
im getting alot of crank case pressure i need to take care of.
TECH Senior Member
Joined: Nov 2001
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Re: pvc/crank case pressure the next level. Exhaust wont work unless you run open headers. Too much backpressure in a catback system.
I have always block off the T-body fresh air line and routed that line from the valvecover to within 1 inch of the air filter. I wasn't running high boost (5#s in my powerdyne and 8 pounds on my old procharged Z-28) but that with a PCV checkvalve got rid of any crankcase pressurizing problems.
Cheers,
Chris
I have always block off the T-body fresh air line and routed that line from the valvecover to within 1 inch of the air filter. I wasn't running high boost (5#s in my powerdyne and 8 pounds on my old procharged Z-28) but that with a PCV checkvalve got rid of any crankcase pressurizing problems.
Cheers,
Chris
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Re: pvc/crank case pressure the next level. Same method as above, but I went from the fitting at the back of the driver's-side valve cover behind the brake booster, over the shock tower and into the inlet tube right next to the filter. I don't have any oil in the intake, but I figured that if I did, it would just oil up the K&N for me. 
The PVC is a Grainger check in the standard location instead of the lame factory PCV.
No pressure issues.
SC-
The PVC is a Grainger check in the standard location instead of the lame factory PCV.
No pressure issues.
SC-
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Re: pvc/crank case pressure the next level. I ran the checkvalve and the PCV in my apps but just the checkvalve would probably work fine. If you are getting lots of blowby after the above changes you might have a ringland problem.
Chris
Chris
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From: Jacksonville
Re: pvc/crank case pressure the next level. I know this may not help you much since you have a Turbo but FWIW, might give you some ideas. I took removed the entire PCV. I'm using the Intake where the PCV was to operate a BOV. Connected all the sources of the PCV lines and have them dumped into a Catch Can. The vacuum side of the catch can is provided by the Intake Side of my Blowers Intake Duct. That side never sees boost.
I don't see why you couldn't do something like that even with a Turbo.. It's gotta have a Fresh Air Side that's sucking in no matter what right?
I don't see why you couldn't do something like that even with a Turbo.. It's gotta have a Fresh Air Side that's sucking in no matter what right?
Thread Starter
TECH Senior Member
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From: Columbus, ohio
Re: pvc/crank case pressure the next level. i was going to rig something up like that temporarily, to my intake before the turbo, but dont think it will draw the vacuum i need.
i ned to now good evac pumps that are out which will fit the ls1.
i ned to now good evac pumps that are out which will fit the ls1.
