Has anyone installed an Oil Catch Can, from Cusco or Greddy?

 

Get one from Jegs. They make a nice looking octagonal 1qt piece that's pretty well priced.

Brandon

 

What exactly, or rather, how does the oil catch can work? isn't oil inside the engine? Always wondered how this thing work....

 

For a number of reasons, if there weren't a vent in the oil system, it would pressurize and things would get ugly. Normally, the PCV valve takes care of venting this pressure. It routes the aerated oil that this pressure creats into the intake stream so that it gets burned.

If you remove your emissions system, you end up with either one (N/A) or two (TII) vents coming from the engine that will spew oil all over the place. A catchcan, well, catches this oil and stores it so that you can do with it what you please.

Brandon

 

Well I just bought one from my friend. And technically I don't think its useful for a Rx7 since the engine design is different from pistons which sometimes require them.

I have all my emmissions..and sayign that I install the catch can which hoses should I plug and lead to the catch can?

 

Cant you just buy those little K&N filters, stick that on the end of a vent line and attach it some where near the bottom, or under the car? Not exactly the most environmentally friendly method I guess. But then again a lot of us arent running cats

 

anyone have pictures of a catch can installed? I too would like to know from where Oil would spew out.

 

Yea I would too.
Pictures

 

Where do these lines start from? And why doesn't the oil system pressurize the catch can? And how does the oil in the can get back to inside the engine, do you have to manually drain it back into the engine? What happens when the catch can gets full, does the engine overpressure itself then?

 

Good questions.

The common oil vent is next to the oil filler neck, down on the intermediate housing. TIIs have an extra one right near the oil filler cap, but that one's not nearly as messy.

A catch can has an open-air vent to relieve pressure at the top, and a drain valve at the bottom, by which it is emptied. The whole idea is that oil added into the intake stream takes the place of fuel and air, and thus reduces hp. So you stop that from happening. Well, and it eliminates complexity. But you also catch the oil in a can so it doesn't make your engine messy. Follow? When the catch can fills up, you just drain it into a drain pan or an empty oil bottle and recycle it. If it overfills, oil spews out the open-air vent at the top, as if you were overfilling any sort of container.

Brandon

 

Mazda loved that damn oil injection **** didn't they? I guess I see the need for it being that the rotary has lots of metal seals on the rotors and the car wouldn't have appealed to as many people if having to remember to use premix was sales point. But I run premix! But why can't the original vents relieve the pressure? Its exposed to the atmosphere, and it is at the highest point of the engine.

Would a oil pan baffel prevent oil from over pressuring and over flowing?

 

If you leave it to be open vented it will make a HUGE mess all over your engine bay. Think of a oil spill in the ocean.

 

No it will still be pressurized -Gabe

 

Hmm.. i have never heard of any oil bustin' out from runnin premix. Well, my friend Gabe "Rotorific" has a ******* oil spill in his car, and we cant seem to find out where its at. You guys think its this no catch can ****?

Anyone have a site or pictures that are more specific?

Thanks

 

Ok me and charles just talked about my oil spill it was because of my omp block off plate, ive since then fixed it so disregard what he said hes well uh high -Gabe

 

Guys, please reread what I said. The oil injection system and the PCV system are two completely different things.

Brandon

 

Does anyone have actual pictues of an oil catch can on their car?

 

Yes, this is my car

can should be upright though LOL... just no room.


goes from oil fill vent tube to catch can, to TID