I think part of my issue was no pcv valve to restrict flow.

PCV valve is indeed needed. It actually closes at idle, and, if the right one, again under boost. It only flows in between.

Either use a 323GTX turbo style PCV, or stock valve with added check valve. I don't think it matters which side of the catch can, but if between the can and the valve cover, the can will see boost.

+1 for the 323 GTX PCV with a check valve

Run a quality can on each side. On the pass side run from the pcv or chk valve to the can then to the intake manifold orig. spot. On the dr side run the line from the valve cover to another closed can then to the intake tract somewhere behind the kn filter Not the bottom of the filter. The highest vac is idling which is drawing a vac through the pcv [which does not completely close in that direction] or chk valve. The air source is from the other side being vented into the intake tract which has very low air flow going on. As revs increase and vac decreases the pcv or chk valve starts to close and when closed at high rpm's the air hauling ass past the hole in the intake tract well create a vac., but that line needs to be plumbed into the hose and not the bottom of the filter to create the vacuum. The same thing happens but even better when FI as when in boost the valve closes and the air in the intake tract is really hauling creating even more vac then when NA. I just bought 2 Radium engineering catch cans and this is the setup I am going to do.

May I ask why you feel this way?

I have an n/a track car on sticky tires. After high-G, left turns (Laguna Seca T, T6, T9) I get a lot of blowby smoke. Meatball flag ensued.

Then mod your valve cover so that it drains and filers better.

Or do this. I made a turn-up of the breather port, so that it breathes from oboe the oil puddle.

https://www.miataturbo.net/attachmen...ine=1452540115

How so? I read this thread and so many others that my head is spinning, with lots of conflicting information...

Better yet, pull from the driver side vent instead, bUT that the one yout need to enlarge the vent hole on, aND add finter media.. Don't use the other one, where the oil pools.

I did both of them, but I'm 97% sure that my bent breather would have solved everything. Of course that's because it was my idea.

I would think that you'd be getting a different color flag if you're turning left at T4 :giggle: :rolleyes:

My phone posts are horrible.

:facepalm: Agreed (and fixed)!