Deleting the Crankcase vent?

TerribleONE · 03-06-2014, 03:11 PM

Subd

Mitco39 · 03-06-2014, 03:19 PM

Quote:

Originally Posted by SPOHN

Or just block off the holes in the intake tube.

But if you do that then lines 6 and 14 (and the filters on them) are going to be exhausting much more than they already are, which could cause oil vapour to start making a mess of the engine.

SPOHN · 03-06-2014, 04:05 PM

Yea I just haven't seen that over a period of a year in track environment with my car. And the front two are freely open.

6MT · 03-06-2014, 04:12 PM

Quote:

Originally Posted by Mitco39

But if you do that then lines 6 and 14 (and the filters on them) are going to be exhausting much more than they already are, which could cause oil vapour to start making a mess of the engine.

yeah, why would you do that?

MyKindaGuise · 03-06-2014, 04:19 PM

Quote:

Originally Posted by SPOHN

Yea I just haven't seen that over a period of a year in track environment with my car. And the front two are freely open.

Same here. minus the crazy track time.

luigi90210 · 03-06-2014, 06:36 PM

venting the PCV valve will not harm the motor, only reason why its recirc into the intake is for emissions purposes

just whatever you do dont close the PCV, either have it recirc or vta, if you close it off entirely, you will harm the motor

phunk · 03-06-2014, 07:50 PM

I always run PCV systems as they come from the factory, no harm done. When I turbo the car, I just relocate the fresh air vents to pre-turbo how they come on factory turbo cars.

The oil going through the intake is extremely minimal. It builds up a thin residue inside the piping, but its never slowed my car down or caused a failure. I never really understood all the stress over catching it in a can and all the hoses all over the place. But I wouldn't eliminate the setup either.

The way the BP turbo kit has you do it makes plenty of sense since the turbo inlet is rather far away from that point.

L33T Z34 · 03-10-2014, 12:36 PM

Quote:

Originally Posted by juld0zer

deleting 6 and 14 is a bad idea for NA as you'll get idling issues.
look here: HELP PLEASE: Engine Idle Problem

even if you disconnected them from your intake and whacked a small filter on the ends, you'd be creating another problem - unmetered (hotter) air entering the engine.

it's all part of a circuit where 1 and 13 are under vacuum and suck the ccv gases in to be burnt up. 6 and 14 are the fresh air supply lines, to replace the ccv gases, oil vapour etc sucked out via 1 and 13. ever wondered why you dont see oily gunk in your intake pipes?

Sorry, you're wrong. I've had breather filters on my valve covers for over four years w/thousands of miles. No idle issues and no "oil residue" in my engine bay. I don't want oil residue in my intake pipes and oil/dirt/gunk making my throttle bodies stick.

BillyBoy · Today, 01:32 AM

Quote:

Originally Posted by SPOHN

Yea I just haven't seen that over a period of a year in track environment with my car. And the front two are freely open.

I know I’m reviving a decade old thread, so no one may even have this info anymore. Can I check Spohn, if I run vents on the rear ports (that usually connect to the intake tubes), and leave the front PCV hoses (with the check valves, that connect to the front of the manifold) connected like OEM, will that work fine?

I’m seeing so much conflicting info on the PCV and CCV system for these motors, hard to make heads or tails of it.

03-06-2014, 03:11 PM	#16 (permalink)
TerribleONE A True Z Fanatic Join Date: Jan 2009 Location: Socal Posts: 10,203 Drives: WOT Rep Power: 5850	Subd __________________ 638WHP 541WTQ @ 13.5PSI Build thread

03-06-2014, 04:05 PM	#18 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 45 Posts: 14,844 Drives: Waiting on next Z Rep Power: 221	Yea I just haven't seen that over a period of a year in track environment with my car. And the front two are freely open. __________________

03-06-2014, 06:36 PM	#21 (permalink)
luigi90210 A True Z Fanatic Join Date: Apr 2012 Location: San Diego CA Posts: 1,103 Drives: Classified Rep Power: 15	venting the PCV valve will not harm the motor, only reason why its recirc into the intake is for emissions purposes just whatever you do dont close the PCV, either have it recirc or vta, if you close it off entirely, you will harm the motor SPOHN likes this. __________________ SOLD 370z New Car:classified DD:2011 Mini Cooper S stock

03-06-2014, 07:50 PM	#22 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,668 Drives: 370 Rep Power: 974723	I always run PCV systems as they come from the factory, no harm done. When I turbo the car, I just relocate the fresh air vents to pre-turbo how they come on factory turbo cars. The oil going through the intake is extremely minimal. It builds up a thin residue inside the piping, but its never slowed my car down or caused a failure. I never really understood all the stress over catching it in a can and all the hoses all over the place. But I wouldn't eliminate the setup either. The way the BP turbo kit has you do it makes plenty of sense since the turbo inlet is rather far away from that point. luigi90210 likes this. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

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