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PCV/breather setups for large shots

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Old Nov 20, 2015 | 06:18 PM
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Default PCV/breather setups for large shots

What is everyone doing for PCV setups on 300+ shots?


I have a 383 with a 300 shot and I'm hunting down a nasty rear oil leak that I assume to be a pushed rear main from crankcase pressure.


My current setup is a ls6 valley to catch can to intake (fast 102)
Throttle body is capped

Valve covers run together then T to a large k&n breather.

The valve covers are those aftermarket crinkle painted ones- I don't remember the brand.


Any feedback / suggestions?
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Old Nov 20, 2015 | 08:09 PM
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I had a catch can as well and it would not relieve the pressure properly. I am just venting to atmosphere through a large filter on a fitting tapped into the oil fill cap. All other vents capped. 200 shot here and daily driver. I know mighty mouse has a decent catch can.
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Old Nov 22, 2015 | 09:14 PM
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my car leaks like a pig from the rear main on a 200 shot. I had it vented to atmoshpere before the spray but couldnt handle the crank case fumes in the cabin, so i switched back to stock ls1 crank venting.

But now that im on a 200, its not liking it at all. Motor is coming out soon to get sealed up, but i gotta figure something else out before it goes back in.
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Old Nov 22, 2015 | 09:29 PM
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After talking to some people, I'm going to do a -10 line from each valve cover to a large, dual entry, vented catch can.

Hopefully this is good enough-- if not, it's getting a gz vacuum pump setup I guess.
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Old Nov 23, 2015 | 10:05 AM
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Originally Posted by ZackMorris
After talking to some people, I'm going to do a -10 line from each valve cover to a large, dual entry, vented catch can.

Hopefully this is good enough-- if not, it's getting a gz vacuum pump setup I guess.
Is this a street car? Do you get a lot of crank case fumes in the cabin?

I'm trying to avoid showing up to work smelling like an engine lol
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Old Nov 23, 2015 | 11:02 AM
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Street car in the essence that it gets raced on the street.


It only gets driven to meets or events.
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Old Nov 24, 2015 | 08:09 PM
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I run a breather on the oil fill, and a small breather on the drivers side small nipple. I have the hose that runs off the passenger side just vented. No problem as of yet. I daily mine also.
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