Who here uses an oil catch?
 

I realize most people use an oil catch on their boosted vehicles but i love all the rice boys with cars that have 30k on the motor and are running n/a, little do they realize but it is detrimental to their engines health.

Re: Who here uses an oil catch?
 

if its bad for an engine thats news to me. care to explain?

i work on brand new airplanes that come stock with oil catch cans. they drain back into the engine, but its the same thing

Re: Who here uses an oil catch?
 

Oil catchcans hurt nothing, and increase the longevity of anything that has blowby. That includes NA builds, some of those guys actually need them.

Re: Who here uses an oil catch?
 

I ran a catch can, then took it out. Tube goes right across my tranny and points to the ground.

Re: Who here uses an oil catch?
 

Enginge life was doubled when they started using PCV systems instead of downdraft tubes.

Re: Who here uses an oil catch?
 

I don't know what you're trying to get at, but it's better than a stock PCV system with a turbo on my engine. It's the same damn catchcan setup that everybody and their mom runs, minus the can. Save the earth.

Re: Who here uses an oil catch?
 

PCV is for emissions. Go look up why it was created and put into use.

IMO catch cans are teh ghey. I have two vent hoses off my valve cover that dump on the ground.

Re: Who here uses an oil catch?
 

i like a clean engine bay. i plan to use one with my new setup

Re: Who here uses an oil catch?
 

A tube running to the ground leaves your engine bay less cluttered ;)

Re: Who here uses an oil catch?
 

I just put a mt. dew bottle in for now so I can see how much oil is actually coming out

Re: Who here uses an oil catch?
 

False.

Re: Who here uses an oil catch?
 

read it in one of my text books when I was in tech school. I guess they just make those up now?

Re: Who here uses an oil catch?
 

That is a pretty bold statement saying that engine life has doubled... If you can find the reason behind it I'd like to hear more

I know you cant pass emissions if your gas cap doesnt seal properly because you would be venting the fumes to the atmosphere. As far as I know the only reason that PCV is routed to the intake manifold is so that it doesnt vent fumes to the atmosphere and gives the vapor a chance to burn up in the combustion chamber resulting in a more emission friendly vehicle

Re: Who here uses an oil catch?
 

Tech school FTL.

Forget everything they taught you and then you can start to learn. :y :6

Re: Who here uses an oil catch?
 

...this is a correct statement.


Again, tech school FTL.

Re: Who here uses an oil catch?
 

W0rd.


If your can is sealed with no breather on it or both ports are used then it's not letting any pressure escape. Vent to the ground.


JP

Re: Who here uses an oil catch?
 

Anyone have a clue as to how much air actually vents out from the crankcase? I can blow air thru the PCV but its relatively low volume... I cant imagine a ton of air actually coming out in a timely manner

Re: Who here uses an oil catch?
 

true- in 1963 the average engine wouldnt go near as long without a rebuild as compared to an engine with an implicated pcv in place. The purpose of an actual pcv is to disgard harmful gas buildup in your engine to help longevity, as well as the oil comes through into the intake and through the head, releasing the mist of oil vapors lubricating the head from an area that generally has no other way of receiving this therefor increasing the longevity of ones engine.

Re: Who here uses an oil catch?
 

It lubes the nonmoving intake manifold and coats it in oil.
your ------- dumb because you do not understand how it works.
It was put in motors for emmision only

Re: Who here uses an oil catch?
 

using the pcv on a boosted motor is harmful but thats another thread. I thought it was for emissions only also

Re: Who here uses an oil catch?
 

That's a bunch of crap you were told so dumb rednecks wouldn't disable a working PCV system out of ignorance.

The only thing that dictates engine longevity, aside from design, is exhaust valve guide temps. ----------ing Sir Harry Ricardo discovered back in the teens that engine life was directly affected by temps at the exhaust valve. Any oil vapors from PCV are burned up by the time they reach the exhaust valve.


A working PCV system is great because it pulls oil away from all the seals and gaskets in the engine, so if any of them are a little leaky none pass oil while the engine is operating in the vacuum range. Ever had a car that started smoking after you shut it off, from oil dumping out of a valvecover gasket onto the exhaust manifold? That was a functional PCV system.


Anything pushing power creates blowby when you lay into it. All an emissions-legal PCV system does is cause crankcase pressure to build up and blow out seals and force oil past the rings. Not good ----.

Re: Who here uses an oil catch?
 

If I wasn't banned from DSMtuners for arguing with a "wiseman" about PCV systems (he swore it was nessesary for ring seal and I said it was for emissions only), I would link them this thread or send JD over there and then laugh for days.

Re: Who here uses an oil catch?
 

ring seal is better when the crankcase is in vaccuum but it is not nessescery for good ring seal, but it does help efficiency wise. Its worthlesss in a boosted motor because pcv system will allow the crankcase to become pressurized and that is not good at all.

Re: Who here uses an oil catch?
 

So their is no proven facts to say that friction is related in anyway to engine life?

Re: Who here uses an oil catch?
 

how dose pcv have any thing to do with friction

Re: Who here uses an oil catch?
 

Re: Who here uses an oil catch?
 

pcv valves are just one of many of reasons engines last a lot longer now.

Re: Who here uses an oil catch?
 

I believe that a properly setup crankcase vent on any engine will increase its life by lessening oil contamination. A vacume at idle on your crankcase burns up all your blowby gasses keeping your oil cleaner. Although at heavy engine load you do need to be able to get rid of all those blowby gasses with a quickness which a draft tube does very well.

I personally have both my crank vent and vc vent routed to a catchcan with a baffle in it and a big 2" hole in the top for gasses to vent. And I change my oil often ;)

Re: Who here uses an oil catch?
 

Of course, but the problem with PCV is that it only gives that crank case vacuum when you need it least (at light throttle cruise) and not when you really need it (at heavy/WOT).

Re: Who here uses an oil catch?
 

I run 2 moroso breather tanks, one that connects to the block, and one that connects to the valve cover via 10AN lines drained back to the block. my dipstick used to pop out with the stock pcv sytem , even with brand new pcv valve. so the cans are worth it.

Re: Who here uses an oil catch?
 

if the pcv valve is working then pressure cant go backwards through the valve. boost will keep the valve shut allowing blowby to build up though