Anybody remove their PCV and just run a road draft tube? Does it work on a modern car set-up originally to run a PCV? This way you can vent both sides. Run a breather filter and not worry about the non-metered air issue during vaccum conditions. Or just run a road draft tube on both sides. Just venting the PCV, I don't think would work correctly, would it?

I've been expiermenting with different DIY catch can set-ups and haven't been satisfied on the PCV side yet. The breather side, simple fuel filters work wonders. But again, it's that PCV side. Oil gunk STILL finds a way past the can. Even filtered/baffeled cans. I'd rather vent it and be done with it, but many people don't like this idea. So I thought about older cars that don't have PCV valves, but instead draft tubes. I'm just curious if modern cars, like the Evo would be affected at all by simply running a draft tube.

I can never find a flat out yes or no answer about VTA PCV, and everybody has different opinions. Anywhere I can find 100% truth to this issue? :P

 

Its impossible to stop all the oil unless you were perhaps to set up some sort of cold trap system to try to precipitate out the oil vapor.

 

your best bet is to use a catch can, some oil might pass but its better than nothing.

 

So it's normal for some vapors to pass? I use clear braided tube, and the first tube is already starting to REALLY brown up, but after the can it's only slightly brown for about 2 inches off the can and then fades into clear to the intake manifold.

I was talking to the master lead tech at my shop, and he's the one who mentioned road draft tubes to me. If you cut the end of the tube at an angle (didn't specify which way) that the wind from under the car will actually create a vaccum and pull the vapors out, just like the intake manifold would. Just not sure if this would cause any complications on a modern car that's MADE to run a PCV, or it would have little to no affect at all.

I'd like to run a REAL catch can, but they're too much money. And, for the money you pay, they don't work 100%. I'd like the VTA if I can and be done with it.

 

If you daily drive your car, I'd keep the PCV system. Its very helpful for removing condensate and volitales that build up in oil. Check out some of the air compressor filter/condensation traps at Lowes/Home Depot. I just saw a very nice size one (maybe 2.5" OD by 4" long that was only $23. They are rated for 90 psi, so its definitely not going to burst.

 

That's actually what I'm currently using. It deifnatley is catching oil, but some oil is also getting past.