rx7matt

I recently made up some air oil seperators for some mates cars out of polished stainless. They look great and i now want to put one on my car.
Can anyone tell me how and where i run the lines from???

Cosmo Donk

Is this a baffle plate? I am not quite sure what you are speaking of because baffle plates so mess with the lines.

rx7matt

It's basically 3inch tube 275mm long, with 2 16mm outlets down the side and 1 at the top with a small air filter on it.

i think they are mainly for blowby after excess pressure builds in the motor and extra air lines that remain after you remove your emissions crap and air ducting. this one wasn't designed to flow oil right through it and back out. only mists of oil if ANY get blown through. it probably is more for show then purpose.

i just want to know what lines i can run to it. I think its just the breather or vacumm lines, which i don't know where there are.

thanks guys

Cosmo Donk

Ahh, a catch can. At least that is how I know it. These are not always for show, some people actually use them and it keeps your engine bay clean. If you look at the following pic you will see the breather tube coming off of my Cosmo center plate, and you will see that the FD does not have it there. You will want to run that to your catch can. I can't think of any other tube that would go there though.

RETed

Actually, I think all the cars have a fitting higher up on the filler neck.
Use that one.

Ignore the lower one and plug it - the catch can tends to collect a lot more oil if you use the lower one.


-Ted

Cosmo Donk

Interesting. Maybe that is why they got rid of it? Because they just used the oil filler neck one?

Thanks Ted.

RETed

I can't comment on Mazda's point of view, but that's a good point!

The FC turbo emission system is rather weird, as the purge valve uses the lower fitting at the base of the oil filler neck.  The one-way check valve going to the TID uses the upper one!  The upper one also Y's with the charcoal canister, but it's puzzling to see why Mazda wanted two emissions systems to be pulling fumes from the "PCV".  One would be working all the time (the TID one), but the other would only trigger under non-boost conditions (purge valve).

Makes ya wonder...


-Ted

Cosmo Donk

Maybe it is one of those overengineered things. Eh. Oh well.

jon88se

they don't keep the engine bay clean, they actually make it dirty it keeps the intake/engine clean by not sending all that vapor and crap back into the intake to be burned up by emissions. over time this stuff coats and builds up in the intake, TB etc... I have a catch can in my GVR4 and it works really well...I have a nice place for it and a K&N filter on the vent tube but once the can is full (about 3K) crap leaks out of the filter and onto the subframe. it's nothing a quick wipe down doesn't fix, you just have to be sure to emtpy the can with each oil change. every time I get 3/4 of nasty water and then the rest is oil dirty and grime. my TB and IC pipes are spotless, car doesn't use any oil

jon88se

just a quick sidebar - I'm not sure how often you guys empty yours but the DSM guys all set them up the way I did (or should I say I set it up the way they did) and it shocked me how often I had to empty the can. After a pretty hard run for a couple of minutes yuo can watch the K&N vent vapors into the atmosphere - ewww. the stuff that comes out after the water (the moe oily stuff) is just brown disgustingness gross - it looks like puke!! there are no emissions on my GVR4 so it all collects here and is mounted on the firewall where the cruise used to be, the only downside being that sometimes you can smell the vapors inside the car (after a hard run).