Oil cap breather? - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

ducq · 01-07-2012, 05:46 PM

Getting a cam swap and wondering if this rx catch can and oil cap breather will give the tuner problems? I thought I read somewhere that this breather is okay but I want to find out for sure

MikeOD · 01-07-2012, 05:58 PM

Essentially, you'll be letting unmetered air into the engine through the crankcase system that hasn't been measured by the MAF...I wouldn't do it.

The Stig · 01-07-2012, 06:09 PM

Quote:

Originally Posted by MikeOD

Essentially, you'll be letting unmetered air into the engine through the crankcase system that hasn't been measured by the MAF...I wouldn't do it.

Please research before posting on a topic.

The RX oil breather has a check valve to only allow air out of the crankcase, not in. This helps with positive crankcase ventilation and decreases oil blow by.

If you got an oil breather off of eBay per say, that didn't have a check valve. Then yes you would be letting unmetered air into the crankcase.

DandD · 01-07-2012, 06:46 PM

Thank you Stieger

MikeOD · 01-07-2012, 08:03 PM

Quote:

Originally Posted by stieger

Please research before posting on a topic.

The RX oil breather has a check valve to only allow air out of the crankcase, not in. This helps with positive crankcase ventilation and decreases oil blow by.

If you got an oil breather off of eBay per say, that didn't have a check valve. Then yes you would be letting unmetered air into the crankcase.

My mistake, complete missed where he listed a specific brand.

If the check valve is reliable, then yeah, shouldn't affect the tune at all.

ducq · 01-07-2012, 10:26 PM

Okay I don't have to go digging for that tube and stock oil cap. I'll let my tuner know what stieger posted and see what he says.

"The RX oil breather has a check valve to only allow air out of the crankcase, not in. This helps with positive crankcase ventilation and decreases oil blow by. "

Thanks !

The Stig · 01-07-2012, 10:28 PM

Quote:

Originally Posted by MikeOD

My mistake, complete missed where he listed a specific brand.

If the check valve is reliable, then yeah, shouldn't affect the tune at all.

No worries. Didn't mean to jump down your throat about it btw, it's just been a rough day.

axis · 01-08-2012, 08:36 AM

Even if it diid suck air in, how would that affect the tune? It's not like it's going into the combustion chamber. Unmetered air is only bad for the tune if it's using up fuel.

To the OP:
Be sure to check with guys that have it to see if they are getting excessive oily residue all over their engine. I had one for a short while on my old turbo Talon and it would blow oily residue all over everything.

The Stig · 01-08-2012, 08:56 AM

It will throw off the A/F ratio thus causing you to pull timing.

yotaman96 · 01-08-2012, 08:59 AM

Quoted from SC2150 himself.

"These breathers have a integrated one way checkvalve that helps prevent any mist escaping from the breather into your engine compartment as well as controls the correct amount of flow into the crankcase unlike a "open" breather."

2SSCAMARO · 01-08-2012, 09:51 AM

Quote:

Originally Posted by stieger

Please research before posting on a topic.

The RX oil breather has a check valve to only allow air out of the crankcase, not in. This helps with positive crankcase ventilation and decreases oil blow by.

If you got an oil breather off of eBay per say, that didn't have a check valve. Then yes you would be letting unmetered air into the crankcase.

You really do need to follow your own advice!

The Stig · 01-08-2012, 10:39 AM

Quote:

Originally Posted by 2SSCAMARO

You really do need to follow your own advice!

Haha fair enough. That's my bad for getting it backwards. But either or, the RX oil breather does have a check valve

jlauber588 · 01-08-2012, 01:16 PM

Quote:

Originally Posted by axis

Even if it diid suck air in, how would that affect the tune? It's not like it's going into the combustion chamber. Unmetered air is only bad for the tune if it's using up fuel.

To the OP:
Be sure to check with guys that have it to see if they are getting excessive oily residue all over their engine. I had one for a short while on my old turbo Talon and it would blow oily residue all over everything.

Had mine for 600 miles now and no oil anywhere. Now even on the breather filter.

Sent from my DROID BIONIC using Tapatalk

IndeedSS1 · 01-08-2012, 03:04 PM

Since you are going to have it tuned, any potential changes to fueling can be adusted. fwiw. I put a breather on my Impala and it threw the fuel trims way off. Someone was supposed to send me the RX breather to test on my Camaro (it's not custom tuned) so I could see if it affected fuel trims, but I've not seen it yet.

01-07-2012, 05:46 PM	#1
ducq Drives: 2010 Camaro 1SS/RS LS3 blck w/ IOM Join Date: May 2010 Location: Bay Area, CA Posts: 580	Oil cap breather? Getting a cam swap and wondering if this rx catch can and oil cap breather will give the tuner problems? I thought I read somewhere that this breather is okay but I want to find out for sure __________________ TSP 229/236 cam .Magnaflow Comp axleback .KOOKS LT w/ high flow cats .magnapack bullets. C.A.I. Vmax ported TB. Dyno tuned 452hp / 422tq.

01-07-2012, 05:58 PM	#2
MikeOD Drives: 2010 M6 2SS Join Date: Mar 2011 Location: South Windsor, CT Posts: 1,202	Essentially, you'll be letting unmetered air into the engine through the crankcase system that hasn't been measured by the MAF...I wouldn't do it. __________________ 2010 Camaro SS M6. Heads/Cam/Intake/Headers/Exhaust/Suspension

01-07-2012, 06:46 PM	#4
DandD Drives: 2010 2SS and 2011 LS Join Date: Aug 2011 Location: Western burbs of the Motor City Posts: 628 View My Garage	Thank you Stieger __________________ Around here we like baseball, hot dogs, apple pie, and Chevrolet

01-07-2012, 10:26 PM	#6
ducq Drives: 2010 Camaro 1SS/RS LS3 blck w/ IOM Join Date: May 2010 Location: Bay Area, CA Posts: 580	Okay I don't have to go digging for that tube and stock oil cap. I'll let my tuner know what stieger posted and see what he says. "The RX oil breather has a check valve to only allow air out of the crankcase, not in. This helps with positive crankcase ventilation and decreases oil blow by. " Thanks ! __________________ TSP 229/236 cam .Magnaflow Comp axleback .KOOKS LT w/ high flow cats .magnapack bullets. C.A.I. Vmax ported TB. Dyno tuned 452hp / 422tq.

01-08-2012, 08:36 AM	#8
axis Search Ninja Drives: 2010 Black 2SS/RS A6 Join Date: Oct 2009 Location: Central Ark Posts: 7,183	Even if it diid suck air in, how would that affect the tune? It's not like it's going into the combustion chamber. Unmetered air is only bad for the tune if it's using up fuel. To the OP: Be sure to check with guys that have it to see if they are getting excessive oily residue all over their engine. I had one for a short while on my old turbo Talon and it would blow oily residue all over everything. __________________ 2010 Black 2SS/RS A6 Halltech CF 102 fed GPI modded intake manifold Bo (knows) White ported TB Kooks LT's/ Dynomax VT Pfadted (springs/sways) Dyno tuned by Rhino and GPI I once parallel parked a train.

01-08-2012, 08:56 AM	#9
The Stig knows 2 facts about ducks Drives: ...and they're both wrong Join Date: Aug 2009 Location: The HMS Invincible Posts: 25,072 View My Garage	It will throw off the A/F ratio thus causing you to pull timing. __________________

01-08-2012, 08:59 AM	#10
yotaman96 Drives: 2017 Camaro SS1LE 2000 Trans Am WS6 Join Date: Jul 2008 Location: Portland, TN Posts: 2,952 View My Garage	Quoted from SC2150 himself. "These breathers have a integrated one way checkvalve that helps prevent any mist escaping from the breather into your engine compartment as well as controls the correct amount of flow into the crankcase unlike a "open" breather." __________________ 2017 Krypton Green SS 1LE Magnacharged 2000 Trans Am WS6 manual trans 2002 Trans Am 2015 Ram Crew Cab Cummins

01-08-2012, 03:04 PM	#14
IndeedSS1 Drives: 2010 Camaro SS LS3 Join Date: Sep 2010 Location: Eastern MO Posts: 3,786	Since you are going to have it tuned, any potential changes to fueling can be adusted. fwiw. I put a breather on my Impala and it threw the fuel trims way off. Someone was supposed to send me the RX breather to test on my Camaro (it's not custom tuned) so I could see if it affected fuel trims, but I've not seen it yet. __________________ She is only memory now.

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