You wont get any flow. Pan and Valvecover are connected... If u have to much problems with liquid blowby just cap the pcv site and just run the exhaust side port.

That first part is wrong. I just dis a 5 min google search and Sav has a sound setup. Its actually really really sweet.


Sav: I assume i should have it drain above oil level. Probably opposite side of the turbo drain?

Maybe i got you wrong. Do you mean with "the can then back into the pan" the oil and not the gases?

Nope. Drain it below oil level or you've just created another large orifice for blowby to escape, and no oil will actually drain. The drain needs to be submerged in oil at all times (even under high cornering loads), or you need to run a check valve to prevent blowby flowing up the drain when the oil sloshes in the pan. The MSM does the former, I do the latter on my AOS installs.

You will get flow if you submerge the drain in oil.

So if i was a smart cookie i would submerge as low as possible and run a check valve in the line

HOOOOOOLY SHIT this explains so much.

Just to clarify, i plumb the drivers side valve cover port to the vented catch can, and then to the port on intake pipe. Is that correct?

And the intake manifold tube gets capped as wrll as the pcv valve port?

Im very dumb, and i just want to make sure Im understanding this.

Thats my understanding as well. It looks like on the website you can also just run a filter instead of going to the intake pipe.

a friend in the MSP community said that they stuff steel wool in their baffles to help with this! I feel like the best setup will pull from both sides, just need baffling to allow for that

I currently have copper scrubbers stuffed in there and it works however i will be switching to a Radium AOS on the new motor. PM me and i can ship you my current setup

I too have a copper scrubby in my AOS, but what we are talking about is actually fitting scrubby into the baffled area for the PCV on the valve cover

on that note, perhaps the escort or protege valve covers offer a more optimized design? Does anybody know if the baffling on the other valve covers are any better?

I have scrubbers in my valve cover ya ding-a-ling.

Sav is one of the best if not the best turbo miata engine builder. He know what he is talking about and straight up said in the thread the proper way to catch can.

Haha just wanted to clarify! Well i ask questions with no intention to stamp on the feet of those who flattened the path in the first place, much thanks to sav for the details on the proper routing.

https://cimg1.ibsrv.net/gimg/www.mia...eca010d042.jpg
Heres a photo of the setup. I added the breather to the top of the AOS. Still no scrubby in the valve cover. Going to test for 100 miles and report back. I suspect it won't fill up nearly as fast, although still not ideal.

hey fuckers: https://www.miataturbo.net/engine-pe...ighlight=catch

DUDE seriously you have been spoon fed knowledge on how to do this and been told that yours wont work. There even is a huge thread that got attached that thoroughly discuses this.

"cap the pcv valve port" proceeds to keep it connected...

i literally got up this morning, and drove to napa for caps.

You will still get the same amount of oil, since you arentsupposed to connect that side (not sure why, but more knowledgeable people told me to do it)

I was at the track with someone who had a turbo car, '99 head/VC, and both VC ports routed to a catch can. They were having issues with the can filling up. I told them to cut the hose between the PCV and the catch can and stick a bolt in each end. They did it, suddenly their catch can was not filling with oil.

Must have been a coincidence.

he should also remove the turbo blanket, and reinstall the lower pan.

Sigh.. so much upset for wanting to collect data! As previously stated, I'm not arguing against Sav, and have graciously thanked him and whoever else has done the previous research into this. Cool your jets!

as for my plan and intention for replying.. i will go with the photographed setup for 100 miles to see how it compares to before, the same without a catch can breather. Anyone wanna bet it has the exact same? More? Less?

after 100 miles, ill just cap the PCV port. Ill run it with the can vented and measure. Then remove the filter and run it sealed to the turbo inlet and measure. Not that i expect to find contradictory information, its just numbers for the books so I cam better make sense of things.

sorry for not blindly accepting what others say, a questioning skeptical mind you could say