[texas_mustang]

Found this at clubrsx. Think im gonna try it in a few days.

DIY: Oil Catch Can - Club RSX Message Board

[Avengence]

Nice find, sounds good.

[07 Grabber GT]

Why would you put one on a engine with a PCV ... and with no boost?

[texas_mustang]

They still help.

[JakeM]

Originally Posted by 07 Grabber GT Why would you put one on a engine with a PCV ... and with no boost?

Just like Texas_Mustang said. They help a lot actually. Our pcv system works too good. Pulls WAY to much oil out. When I put my CAI on I took my throttle body off to clean it and it was covered in oil. Anyone that I have ever heard doing CMRC deletes says that they covered as well.

I'm ording a Steph's catch can myself here in the next couple of weeks. (Among other things.)

[itschristorres8]

you can get a NICE looking catch can for $10 more on summit or jegs rather then that

but good find....i see people selling these and catch cans made of PVC(yes PVC)piping...for $50-60....i never understood why in the world would anyone put something so ugly looking that doesnt look like it belongs to save $5-10

[06GTMustang89]

Originally Posted by Towelly Just like Texas_Mustang said. They help a lot actually. Our pcv system works too good. Pulls WAY to much oil out. When I put my CAI on I took my throttle body off to clean it and it was covered in oil. Anyone that I have ever heard doing CMRC deletes says that they covered as well. I'm ording a Steph's catch can myself here in the next couple of weeks. (Among other things.)

linky to this catch can you speak of lol??

[06GTMustang89]

and why don't you just put a little filter over the pcv valve and the opening that returns it to the throttle body???

[06GTMustang89]

Yes i know its turboed but still...this guy blocked his off..



why would you do a catch can when you can block the throttle body side off...and put a filter over the pcv valve so when the pressure builds it just releases it back into the atmosphere instead of back into your intake?? this makes more logical sense to me..

[Flynnster]

Here is a link to a write up for a S197. Are there any downsides to just sticking a breather on it?
PCV Oil Seperator Install - WWW.S197FORUM.COM

[ImpulseCars]

creating a vacuum in the crank case is desirable, especially on a forced induction application where blow by is a potential issue. Another option would be krank vents to prevent pressure inside the crank case and prevent oil from being moved where it should not. krank vents are also quite cheap.

[06GTMustang89]

I gave brenspeed a shout about this whole situation asking them if a breather filter would be ok...so ill wait to hear from them.

[06GTMustang89]

Originally Posted by ImpulseCars creating a vacuum in the crank case is desirable, especially on a forced induction application where blow by is a potential issue. Another option would be krank vents to prevent pressure inside the crank case and prevent oil from being moved where it should not. krank vents are also quite cheap.

blow by is caused by worn piston rings which cause gas to that usually the compression rings don't let by, let by into the crankcase. Before the PCV was invented in 1928 this was a huge problem as the pressure built was insane and would cause failure. Since there is a lot of oil that is transferred and burned by this system a lot of people (engine tuners and builders) use a catch can or a breather filter...the only downside is it doesn't really go along with state emissions since its being let into the atmosphere and not burned in the combustion chamber...

Either way is perfectly fine i would imagine...im going to do the filter and block off tomorrow..

And the vacuum is really only needed to pull the oil and gases back into the intake..thats why the hose is that way...if your not using hte gases to burn then no vacuum is needed because the PCV valve will vent out the gases at the same pressure it would regardless of vacuum or not.

[onederful100]

i had the moroso oil separator, i didnt like how it was real close to my radiator hose, so i replaced it w/ K&N crank cas breathers. my car is running fine. i see some high hp stangs w/ breathers on theirs too, some w/ breathers on the oil filler cap too. the crank case breathers are cheaper, easier to install, and take up less area in your engine. w/ turbo or centri space may be an issue.

[ImpulseCars]

there are a few ways to fix this oil burning problem. Using a breather and blocking of the line is one way to stop oilconsumption, but vacuum can no longer be held in the crankcase. With a krank vent you get both decreased oil consumption and vacuum. The crankcase vacuum greatly reduces oil migration around the piston rings and valve guides of the engine in order to reduce oil consumption, decrease contamination of the combustion chamber from oil leakage, and reduce detonation tendency. The block off/breather would also do that by preventing positive pressure from being created, krank vent would maintain vacuum. The crankcase vacuum also allows a reduction in oil ring tension which in turn reduces engine friction, resulting in a high power output and cooler running engine during operation.
Different approaches, will there be any noticeable change in the vehicle, probably not. But there is a change, thats why I went with a $5 krank vent.

[qwik48r]

nice.. and the catch can is a no brainer.. burning oil in cylinder = DETONATION.

[2006greyGT]

I think mine came with my KB... it has never been full but I just empty it when I notice oil in it... with 16 lbs of boost I think it is a good piece to have..

[JakeM]

Originally Posted by 06GTMustang89 linky to this catch can you speak of lol??

Stef's Overflow & Breather Tanks

[GrtWht]

An oil separator catch can is beneficial on a PD blown car. With a PD blower, it always has high negative pressure on the intake / inlet side. This allows for alot of oil to be pulled into the intake.

As stated, it is not good to have oil in the air / fuel mixture. Oil breaks down the octane and can cause knock. I also believe in using a truly designed separator can.

This is what I run with great success.....

Separator catch can

This is used by alot of GM guys.

[JakeM]

Nice info GrtWht.

As for using breathers instead of a catch can. You also will get a little oil leaking from the breathers and smell of burnt oil. Let alone vacuum being good for crankcase fumes.