PCV, Just another Vacuum Parasite?

[Froggx]

"Save our enviroment." - No, I am strongly against this. People in the past made it what it is today, and we will make it worse for tommorrow, when we are no longer here.Just like the EGR, that was a horrible device, and the CAT. The only emmissions control I am looking to have is the computer controlling the engine.

The fuel vapors that you mention being released are not accounted for, which makes them a bad thing. the computer is essentially being screwed with when outside forces try to change it's working conditions.

-Dave

I'm not sure how things are where you live, but every performance exhaust shop here in Alabama I've seen work done from will actually remove your cat and weld up a straight pipe without asking you if you want this work done when you get any exhaust work done.

[SappySE107]

It is much better to run a vacuum source to the crankcase and valve covers to remove pressure. Without this, you will much more prone to blown rings, seals, gaskets, etc. I want to remove my PCV setup and go with a vacuum pump and a catch can because the stock PCV setup on my motor is just sucking oil into the motor. Otherwise I wouldn't be too concerned with just the stock setup. Im not sure how much vacuum you want max, but will take any info I can on this subject.

Keep the alt. You want to reduce drag, get an electric water pump and power steering (or a non powersteering rack, like the fiero).

[geoffinbc]

Well you get about 18-20" of vacuum at idle so Im sure something even less that that would be just fine for PCV. Maybe 15-10??

[Froggx]

Don't catch cans have to be drained from time to time? How much does a setup like this cost as well? Also, would it be possible to just run a check valve in the PCV line to allow vacuum to reach the crankcase but shut off flow when boost starts to go?

[SappySE107]

Yeah, they have to be drained, but I have no problem with that. Hell, I can filter the oil it sucks up and just pour it back in the motor:P I dunno what it costs as I havent really had time to try to set it up, but to me its worthwhile with the vacuum pump.

I wouldn't checkvalve the PCV. I would want vacuum on the crankcase at all time, especially under boost.

[TRKK11]

Also, would it be possible to just run a check valve in the PCV line to allow vacuum to reach the crankcase but shut off flow when boost starts to go?

A pcv valve is a check valve, when there is vacuum, it will be opened, when there is no vacuum pulling it open, it will be closed. when there is boost added to the picture, it will force the pcv valve to close because there is no vacuum. So putting a "check valve"in your pcv line will not serve any kind of purpose, it would be just like putting 2 pcv valves in line with each other. i dont know if the valve needs to be heavier duty for a boosted application, I would imagine it wouldnt make a difference, but if you are that worried about it, try a pcv valve from a GTP, those have boost, and i have seen them with A LOT of boost and never any crankcase pressurizing problems. also, a PCV valve does not cost that much, so just change it every time you change your oil if you are worried about it failing on you. Just a couple thoughts

[SappySE107]

I have a brand new one from GM and I still have oil sucked up in the engine. I think my problem is with the oil control under the lower intake (DOHC) and its old PCV. I don't believe its too expensive of a part but its not an easy task for everyone either.

[pepsi_coke]

Heres a DIY catch can

http://www.hyundaiperformance.com/forums/topic.php?t=46353&p=1

Do you think the catch can is too big for a PCV system ? And heres a dumb/silly question .. the catch can goes on before or after the PCV valve?