[Jeffman]

I've been searching for data that shows oil catch cans actually improve performance. Can anybody lead me to real data - Dyno pulls, data logging, etc? I am still unconvinced that OCCs do anything. Thanks.

[enrita]

OCC wont improve performance. they will do what they are named for , catch oil .

[Jeffman]

Originally Posted by enrita

OCC wont improve performance. they will do what they are named for , catch oil .

Understood. So catching oil is somehow a good thing. I've read that OCCs prevent the valves from clogging and can prevent oil from coating the inside of the intercooler, among other things. I believe the first is a long term maintenance issue which, I suspect, could be cured every 40K miles with walnut blasting or sea foam. I'm still under 30K and haven't had any major problems. The second could be a performance issue, for example higher IATs with no OCC because of oil coating the IC. If so, how much oil does it take to reduce the cooling efficiency of an IC, and how much time/miles does this correspond to?

[Tzu]

Seems like you've made up your mind already. Some prefer to spend the cash on a catch can for preventitive measures. I just like to keep that gunk out of my rear turbo and charge pipes.

[benzy89]

Originally Posted by JHR

Understood. So catching oil is somehow a good thing. I've read that OCCs prevent the valves from clogging and can prevent oil from coating the inside of the intercooler, among other things. I believe the first is a long term maintenance issue which, I suspect, could be cured every 40K miles with walnut blasting or sea foam. I'm still under 30K and haven't had any major problems. The second could be a performance issue, for example higher IATs with no OCC because of oil coating the IC. If so, how much oil does it take to reduce the cooling efficiency of an IC, and how much time/miles does this correspond to?

An oil catch can will catch oil vapor floating through your intake tract & prevent your intake valves, CP or FMIC with oil without disrupting the airflow. There is no hard data that illustrates how the car loses performance w/o an OCC, but it's intuitive that if your intake valves, CP, DVs/BOVs, and/or FMIC are clogged with oil, they won't be performing 100%.

I have one, it's def working b/c in the intake hoses has oil in it, the output hose does not & there is oil in the can.

[Jeffman]

Originally Posted by benzy89

An oil catch can will catch oil vapor floating through your intake tract & prevent your intake valves, CP or FMIC with oil without disrupting the airflow. There is no hard data that illustrates how the car loses performance w/o an OCC, but it's intuitive that if your intake valves, CP, DVs/BOVs, and/or FMIC are clogged with oil, they won't be performing 100%.

I have one, it's def working b/c in the intake hoses has oil in it, the output hose does not & there is oil in the can.

Thanks, Benzy. I like your response. As I plan on keeping my car for at least another five years it probably makes sense to install one.

[sutter2k]

Originally Posted by benzy89

An oil catch can will catch oil vapor floating through your intake tract & prevent your intake valves, CP or FMIC with oil without disrupting the airflow. There is no hard data that illustrates how the car loses performance w/o an OCC, but it's intuitive that if your intake valves, CP, DVs/BOVs, and/or FMIC are clogged with oil, they won't be performing 100%.

I have one, it's def working b/c in the intake hoses has oil in it, the output hose does not & there is oil in the can.

If you are occasionally feeding oil in addition to your air/fuel you are effectively lowering your octane in an unpredictable manner.

[benzy89]

Originally Posted by sutter2k

If you are occasionally feeding oil in addition to your air/fuel you are effectively lowering your octane in an unpredictable manner.

Wats your point?? An OCC won't add any performance, but if installed correctly & the OCC does not distort airflow/crankcase pressure, the OCC will not hinder performance. So yes, if it's actually catching oil it can prevent performance degradation.

[Mike@N54Tuning.com]

Originally Posted by benzy89

An oil catch can will catch oil vapor floating through your intake tract & prevent your intake valves, CP or FMIC with oil without disrupting the airflow. There is no hard data that illustrates how the car loses performance w/o an OCC, but it's intuitive that if your intake valves, CP, DVs/BOVs, and/or FMIC are clogged with oil, they won't be performing 100%.

I have one, it's def working b/c in the intake hoses has oil in it, the output hose does not & there is oil in the can.

Good description. I always recommend and OCC to customers, especially when getting a new FMIC.

Mike

[benzy89]

Originally Posted by Mike@N54Tuning.com

Good description. I always recommend and OCC to customers, especially when getting a new FMIC.

Mike

Thanks Mike -- I figured after spending $850 on my Helix, I could afford to spend another $175 to protect it with the BMS OCC. Especially since oil blowthrough is a known "headache" with the N54, it's not a bad preventitive measure to take.