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02-15-2013, 06:08 AM
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#1 |
   Drives: . Join Date: Nov 2012
Location: .
Posts: 1,085
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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?
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02-15-2013, 06:16 AM
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#2 | |
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Banned
Drives: 10' 2SS LS3 M6 Join Date: May 2012
Location: Phoenix,AZ
Posts: 1,370
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Quote:
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. |
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02-15-2013, 07:30 AM
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#3 | |
      
Drives: 2010 Camaro SS LS3 Join Date: Sep 2010
Location: Eastern MO
Posts: 3,786
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Quote:
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.
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02-15-2013, 08:45 AM
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#4 |
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instigator
Drives: 2020 6.2 Trail Boss, 2022 XC90 Join Date: Jan 2010
Location: 72034
Posts: 3,979
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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.
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