Crank case ventilation test

[SnoEclipse]

well, of course you would buy a heavy duty shop model with a bottle that can stand up to oils and underhood temps. A lot of them are tempered glass and not taiwan plastic but you have to look for yourself.

Silly Rabbit (Kill Bill is on tv right now....)

[Swifty1638]

in the beginning I had a sealed catch can..ooops. Blew oil out the exhaust..not good. Fixed that RIGHT away by drilling a hole in the top of it. I sold it eventually, and got my JMF one off the FDSM, and now have -8 an lines/fittings for the vc. No more oiling issues, nothing in my intake.

[123abc]

On my car, I'm using a single catch can with two barbed fittings on it and a filter on top. I run a hose to the v/c breather and another to the pcv valve. It was working good but then I upped it to 20 psi and I think the pressure was actually closing the pcv valve so it was spitting oil out. I'm going to drill out my pcv valve so it's hollow since it's not circulated into the intake tract.

[FattyBoomBatty]

I just put my turbo back on today because I was trying to find the oil leak on the bottom of it. Turned out a metal plug that is in the g54b block near the bottom popped out and sprayed oil about 13-14" up onto the bottom of my turbo, causing all the smoke.

With my catch can hooked up like before, I used a socket to blow into the drain hose for the turbo to check for blockage, and all this air came out at my face. I thought it was coming out the exhaust manifold at first, but it turned out to be this plug was missing.

It's a press-fit deal but the crank case was getting over-pressurized and it popped out with normal driving. So, luckily I had another one and put it in with JB weld and a hammer. Should stay, but I re-did the lines for my crank case. the rear valve cover port goes down a tube to a road-draft style exit near the oil pan, and the pcv, and my -10 port go to the catch can, but now all three of the top ports are just open, and I took out all the steel wool.

The difference it clear, the car is noticably faster, there's no way for oil to enter my intake tract anywhere, and excess pressure is allowed to escape. I really was amazed at the difference in acceleration.

Before there was only one outlet going into the air filter, but it was quite obvious after these findings that it was not enough, and the nasty sludge that built up in that can was disgusting, plus I had it draining back to the oil pan (which I eliminated).

catch cans can be done right and wrong very easily. But trial and error is almost the only way to go to find the right combo for each car.

[Halon]

This weekend I noticed Kiggly looks like he is only running a single -10 (size is an eyeball quess) line from his valve cover to a vented can. Interesting I thought as he's running a lot of boost.