Forced Induction Superchargers | Turbochargers | Intercoolers

PCV necessary on boosted apps?

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Old Sep 2, 2009 | 07:47 AM
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Default PCV necessary on boosted apps?

I was thinking about running dual breathers on both valve covers which would delete the pcv system.

Question, what pro's and con's in doing that?
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Old Sep 2, 2009 | 09:18 AM
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https://ls1tech.com/forums/forced-in...rs-inside.html
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Old Sep 2, 2009 | 11:06 AM
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Thanks man! I am going the same route as my old 04 cobra. Using an air compressor humidity catch can w/filter removed ($10 ) inline to intake to catch the oil.

Last edited by Vcious04; Sep 2, 2009 at 11:13 AM.
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Old Sep 2, 2009 | 11:29 AM
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You need something better than a standard pcv system. Under boost your crank case gas pressure rises and can blow your seals causing oil leaks.
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Old Sep 2, 2009 | 11:32 AM
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I dont have a catch can.. just tubing dumping to the ground lol - eco friendly
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Old Sep 2, 2009 | 11:35 AM
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Originally Posted by Vcious04
Thanks man! I am going the same route as my old 04 cobra. Using an air compressor humidity catch can w/filter removed ($10 ) inline to intake to catch the oil.
So far so good with both rocker covers vented in to my home depot catch can, I've made at least 200- 6,500 shifts with this set up with out the seals coming out of the engine.
Originally Posted by XpEdItIoUs
You need something better than a standard pcv system. Under boost your crank case gas pressure rises and can blow your seals causing oil leaks.
Tell me about it ... I about had a heart attack when my seal pushed out on the dyno at 5,000 rpms. I thought my brand new forged moter **** the bed.
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Old Sep 2, 2009 | 11:44 AM
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Originally Posted by conan
Tell me about it ... I about had a heart attack when my seal pushed out on the dyno at 5,000 rpms. I thought my brand new forged moter **** the bed.
That sucks bro, How is your setup working for you? No more seals blowing out I assume
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Old Sep 2, 2009 | 12:07 PM
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Originally Posted by XpEdItIoUs
That sucks bro, How is your setup working for you? No more seals blowing out I assume
The venting is working great, haven't lost a seal since I ditched the stock PCV.
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Old Sep 2, 2009 | 01:17 PM
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Originally Posted by conan
The venting is working great, haven't lost a seal since I ditched the stock PCV.
I'm so glad I have guys like you, ChevyChad & Trust to watch with your builds so I know what to expect with mine.

I will be venting mine exactly like you have yours as our combos will be very similar.
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Old Sep 2, 2009 | 01:28 PM
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Conan, any pics of that setup? I am looking a "easy" PCV setup to do this weekend when i put my heads cam on/in.
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Old Sep 2, 2009 | 01:32 PM
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Originally Posted by BIG_MIKE2005
I'm so glad I have guys like you, ChevyChad & Trust to watch with your builds so I know what to expect with mine.

I will be venting mine exactly like you have yours as our combos will be very similar.

The forced induction world is one of the biggest love / hate relationships I have ever had in my life.
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Old Sep 2, 2009 | 01:35 PM
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Originally Posted by Super Slow SS
Conan, any pics of that setup? I am looking a "easy" PCV setup to do this weekend when i put my heads cam on/in.
http://mycarpics.shutterfly.com/239
http://mycarpics.shutterfly.com/240
http://mycarpics.shutterfly.com/241
http://mycarpics.shutterfly.com/286
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Old Sep 2, 2009 | 01:53 PM
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The intent of the PCV system is to reduce crankcase pressure manifested from blow-by during the engine cycle. Engine vacuum is much more efficient at drawing these gases out of the crankcase than venting to atmosphere. This also creates a small vacuum on the crankcase that does slightly improve ring seal and power output. The final benefit is the environment. A closed PCV system recirculates the blow-by gases rather than releasing them in the atmosphere.
https://ls1tech.com/forums/generatio...outing-ok.html
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Old Sep 2, 2009 | 02:00 PM
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Has anyone used a crankcase evac kit (exhaust venturi)?
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Old Sep 2, 2009 | 02:04 PM
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Thanks for the pics, is there anything in the catch can? And why no way to drain it? Just planning to take it out and pull the lid off? Looks good and like a good idea though!
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Old Sep 2, 2009 | 02:05 PM
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Im going to run two -12an lines from each valve cover to a catch can, Then a -12 to the filter on my turbo to vacuum the gases.
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Old Sep 2, 2009 | 02:08 PM
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Originally Posted by Super Slow SS
Thanks for the pics, is there anything in the catch can? And why no way to drain it? Just planning to take it out and pull the lid off? Looks good and like a good idea though!
I have these oil absorbent mats I use in my shop that I cut and pack into the bottom. The top of my can unscrews and I just change the mat when its oil soaked.
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Old Sep 2, 2009 | 02:12 PM
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Originally Posted by conan
I have these oil absorbent mats I use in my shop that I cut and pack into the bottom. The top of my can unscrews and I just change the mat when its oil soaked.
Seems like a good idea, I know the mats you are talking about .. Seems a lot simpler than other peoples setups I wonder why so many people do really complicated setups?
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Old Sep 2, 2009 | 02:30 PM
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Originally Posted by Super Slow SS
Seems like a good idea, I know the mats you are talking about .. Seems a lot simpler than other peoples setups I wonder why so many people do really complicated setups?
Maybe they overthink it?
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Old Sep 2, 2009 | 02:56 PM
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I don't see much oil in my can. Not like I've seen other guys on here. A piece of the oil mat 4'' wide and 12'' long rolled up like carpet jamed down in the bottom will last 3k miles no problem in my car.
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