Venting crankcase pressure? - Page 4 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ZO6 Bryan · 02-03-2015, 09:45 PM

Doesn't apply to Unreal, but shows the airflow on the ZL1.
Clean air (Yellow Line) is measured by the MAF
Goes thru the small stock filter can and thru the lines and down into the valve covers and into the crankcase.
Circulates in the crankcase and picks ups blow by gases and moisture.
Then dirty air is sucked out of the crankcase at the PCV hose (Red Line) goes in the snout and is burned in the engine.
The red line is the small loop hose(PCV hose) that is routed to a catch can if you have one. Can't see it in the picture but I just drew in where it is.
See that the air coming out of the crankcase(RED) was measured by the MAF before it went in the valve covers(YELLOW).

jayno20 · 02-03-2015, 11:23 PM

Quote:

Originally Posted by ZO6 Bryan

Doesn't apply to Unreal, but shows the airflow on the ZL1.
Clean air (Yellow Line) is measured by the MAF
Goes thru the small stock filter can and thru the lines and down into the valve covers and into the crankcase.
Circulates in the crankcase and picks ups blow by gases and moisture.
Then dirty air is sucked out of the crankcase at the PCV hose (Red Line) goes in the snout and is burned in the engine.
The red line is the small loop hose(PCV hose) that is routed to a catch can if you have one. Can't see it in the picture but I just drew in where it is.
See that the air coming out of the crankcase(RED) was measured by the MAF before it went in the valve covers(YELLOW).

Would putting an oil cap breather on be all I would want to do to help vent or is there anything additional I would want to do to ensure it is properly vented?

patternpilot · 02-04-2015, 12:13 AM

I have the Mighty Mouse catch can for boost. It has the vented valve built in. Catches oil and no pressure build up and no oil outside. Best I have found.

BoostedX2 · 02-04-2015, 05:43 AM

Quote:

Originally Posted by patternpilot

I have the Mighty Mouse catch can for boost. It has the vented valve built in. Catches oil and no pressure build up and no oil outside. Best I have found.

which of thier cans are you running?

Unreal · 02-04-2015, 09:15 AM

For a ZL1 not wanting to redo a ton or go super high HP, the PCV can would work best.

Also agreed, best can made.

SCHUSS · 02-04-2015, 11:38 AM

Thank you Bryan! That is an outstanding illustration of the air flow. Simple and to the point. I was wondering how the MAF would now how much air was running through the PVC system. To be honest I never gave a thought to exactly where the PVC system air was coming from. Thanks again for my "learn something new everyday" moment.

PQ · 02-04-2015, 01:00 PM

Quote:

Originally Posted by ZO6 Bryan

Correct, thats how it works. Except you say MAP but mean MAF.

Oops. Yes. MAF.

jayno20 · 02-04-2015, 01:41 PM

Quote:

Originally Posted by jayno20

Would putting an oil cap breather on be all I would want to do to help vent or is there anything additional I would want to do to ensure it is properly vented?

Stephen12ZL1 · 02-04-2015, 01:50 PM

just make sure it is there when the ECM is calibrated or alert the remote tuner of its presence

jayno20 · 02-04-2015, 05:49 PM

Quote:

Originally Posted by Stephen12ZL1

just make sure it is there when the ECM is calibrated or alert the remote tuner of its presence

It will be there when I get tuned, but I just wanted to make sure this is the only thing I'd really need to do to help prevent any rear seal damage... Would that be safe to assume?

Unreal · 02-04-2015, 07:56 PM

Up to a certain power point, yes. Sooner or later if you get into big power >1000 you may need more.

CAM....ZL1 · 02-04-2015, 08:31 PM

So how many on here venting. Lol
I know there is no guarantee, but is there a rule of thumb or a point were venting the valve covers is nessasary.
Say is someone with 600 or so RWHP in need of it or is the factory pvc system and catch can sufficient?

Stephen12ZL1 · 02-04-2015, 08:44 PM

My car has been driven hard with many laps at VIR and many passes at the dragstrip. It has no leaks at all from the rear main and it has had a vented valve cover the entire time. Yes, it may spatter a little oil (very little) but this is a minor tradeoff. A vented catch can system like the one Mighty Mouse systems sells is a very good unit and addresses all of these concerns.

CAM....ZL1 · 02-04-2015, 08:47 PM

Quote:

Originally Posted by Stephen12ZL1

My car has been driven hard with many laps at VIR and many passes at the dragstrip. It has no leaks at all from the rear main and it has had a vented valve cover the entire time. Yes, it may spatter a little oil (very little) but this is a minor tradeoff. A vented catch can system like the one Mighty Mouse systems sells is a very good unit and addresses all of these concerns.

You will need a retune for it?

02-03-2015, 09:45 PM	#43
ZO6 Bryan Drives: 02 Z06, 95 Trans Am, 2012 ZL1 Join Date: Mar 2012 Location: Southeast Posts: 1,838 View My Garage	Doesn't apply to Unreal, but shows the airflow on the ZL1. Clean air (Yellow Line) is measured by the MAF Goes thru the small stock filter can and thru the lines and down into the valve covers and into the crankcase. Circulates in the crankcase and picks ups blow by gases and moisture. Then dirty air is sucked out of the crankcase at the PCV hose (Red Line) goes in the snout and is burned in the engine. The red line is the small loop hose(PCV hose) that is routed to a catch can if you have one. Can't see it in the picture but I just drew in where it is. See that the air coming out of the crankcase(RED) was measured by the MAF before it went in the valve covers(YELLOW). Attached Images __________________ Bryan 2018 ZL1 M6

02-04-2015, 12:13 AM	#45
patternpilot Drives: 2012 2SS/RS Join Date: Aug 2011 Location: Tri-Cities WA. Posts: 928 View My Garage	I have the Mighty Mouse catch can for boost. It has the vented valve built in. Catches oil and no pressure build up and no oil outside. Best I have found. __________________ There's more to life than gas mileage LS3, Whipple, Custom Comp Cam, springs, pushrods, timing set, CAI intake, Apex cold air scoop, Doug Thorley TRI-Y headers, Billet Custom Products baffled Valve covers, Mighty Mouse Catch can, ADM FPCM, ZL1 fuel pump, MSD boost-a-pump, Hex Vent hood vents, ProSport gauges(fuel pressure, AFR, Boost), Corsa, 100 cell Cats. Jannetty remote tuned, Pfadt trailing arms, all parts user installed. No Dyno yet. Manual trans. 3.45 gears.

02-04-2015, 09:15 AM	#47
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	For a ZL1 not wanting to redo a ton or go super high HP, the PCV can would work best. Also agreed, best can made. __________________ Nick Corvette Z06 -1200ish rwhp

02-04-2015, 11:38 AM	#48
SCHUSS 709 RWHP & 677 RWTQ Drives: 13' HPE 800 ZL1..... IOM vert, M6 Join Date: Feb 2013 Location: South Windsor, CT Posts: 1,140	Thank you Bryan! That is an outstanding illustration of the air flow. Simple and to the point. I was wondering how the MAF would now how much air was running through the PVC system. To be honest I never gave a thought to exactly where the PVC system air was coming from. Thanks again for my "learn something new everyday" moment. __________________ 11.34 @ 124.88

02-04-2015, 01:50 PM	#51
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,808	just make sure it is there when the ECM is calibrated or alert the remote tuner of its presence __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

02-04-2015, 07:56 PM	#53
Unreal Drives: 2006 Z06 Join Date: Oct 2010 Location: Gilbert, AZ Posts: 5,712	Up to a certain power point, yes. Sooner or later if you get into big power >1000 you may need more. __________________ Nick Corvette Z06 -1200ish rwhp

02-04-2015, 08:31 PM	#54
CAM....ZL1 Drives: 2012 ZL1 Join Date: Feb 2012 Location: BENTON, IL. Posts: 1,068 View My Garage	So how many on here venting. Lol I know there is no guarantee, but is there a rule of thumb or a point were venting the valve covers is nessasary. Say is someone with 600 or so RWHP in need of it or is the factory pvc system and catch can sufficient?

02-04-2015, 08:44 PM	#55
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,808	My car has been driven hard with many laps at VIR and many passes at the dragstrip. It has no leaks at all from the rear main and it has had a vented valve cover the entire time. Yes, it may spatter a little oil (very little) but this is a minor tradeoff. A vented catch can system like the one Mighty Mouse systems sells is a very good unit and addresses all of these concerns. __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)