Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com
 
Hines Performance (HPE)
Go Back   Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums - Camaro5.com > Engine | Drivetrain | Powertrain Technical Discussions > Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons

Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

Reply
 
Thread Tools
Old 02-15-2013, 06:08 AM   #1
family man

 
Drives: .
Join Date: Nov 2012
Location: .
Posts: 1,126
Question breather on oil fill tube

While checking out some engine pics on here, I noticed some people have breathers on their oil fill tube. Why is that? Will it help with cranckcase ventilation and reduce the amount of oil being run though a catch can?
family man is offline   Reply With Quote
Old 02-15-2013, 06:16 AM   #2
Camper
Banned
 
Drives: 10' 2SS LS3 M6
Join Date: May 2012
Location: Phoenix,AZ
Posts: 1,394
Quote:
Originally Posted by family man View Post
While checking out some engine pics on here, I noticed some people have breathers on their oil fill tube. Why is that? Will it help with cranckcase ventilation and reduce the amount of oil being run though a catch can?

I have always ran one and I essentially have no oil running through my system. when I pulled my intake manifold I was pleasantly suprised at how clean my intake ports on my heads were.
Camper is offline   Reply With Quote
Old 02-15-2013, 07:30 AM   #3
IndeedSS1


 
IndeedSS1's Avatar
 
Drives: 2010 Camaro SS LS3
Join Date: Sep 2010
Location: Eastern MO
Posts: 3,804
Quote:
Originally Posted by family man View Post
While checking out some engine pics on here, I noticed some people have breathers on their oil fill tube. Why is that? Will it help with cranckcase ventilation and reduce the amount of oil being run though a catch can?
Just another method of getting the fresh air side of PCV system. But, it will mess with your fuel trims. Since it essentially replaces the makeup air that is mormally and intentionally seen by the MAF sensor it isn't being accounted for.

The breather with the check valve helps reduce this by reducing the incoming airflow, but it will still skew the fuel trims by 6-7% as I recall. I've posted this somewhere on here when I was testing them out. The good news is most people that are considering breathers are modded enough to be tuned. The change in fueling can be corrected by tuning.
__________________


She is only memory now.
IndeedSS1 is offline   Reply With Quote
Old 02-15-2013, 08:45 AM   #4
grocerygetter
instigator
 
grocerygetter's Avatar
 
Drives: Black on black 2009 C6
Join Date: Jan 2010
Location: 72034
Posts: 3,958
yeah...breather on an oil cap plus catch can is 10psi FI territory in a nutshell. ANother way to release crankcase pressure. ECS's doesn't have a valve I don't think...just open breather...Doug told me like a 3-4% adjustment for idle/tip in possibly needed. I'm putting mine on with my Elite catch can when I pulley down. I can have Ted tweak the tune if need be. I pulled the oil cap to test it last week and it idled fine...little different, but fine. Could be Ted's tune.
__________________
-John S.

2014 GMC CC Z71, 2009 C6 vette (57x/53x at the wheel and less than 3300lbs)
2010 Camaro 2ss/rs---SOLD 4/15/14
-654whp with a few cosmetic things, Pfadt suspension, Vortech, CircleD, GPI ss3 vvt bump stick, gears, stuff in between,18" TSW N'rings for drag duty, 20" Forgestar F14s for street.

Thanks to:
Tony@ dv8motoring
rhino@ Gwatney Chevrolet/GPI Jacksonville AR
TCAudio in Benton AR
grocerygetter is offline   Reply With Quote
 
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 11:03 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.