speedfreak391

iTrader: (2)

Do you really have to return the vapors to the motor on a turbo set up? I have a vented catch can set up that I am going to run. What is the need for a return line to the intake. Can I just run the vented dual inlet catch can that I have or do I have to return it to the intake. Whether it be the inlet of the turbo or a port on the manifold?

Camaro9969

iTrader: (12)

Tons of guys just run a -8 or -10 to each valve cover and to a can with no issues. I personally have the mighty mouse can that goes into the intake i have noticed my oil stays cleaner a little longer but i usually change it every 1000 anyways......

speedfreak391

iTrader: (2)

That is exactly what I was thinking. Those vapors do not have to go back into the motor. This is just for emissions correct?

GMouldy

correct.

itsslow98

iTrader: (18)

Pulling vacuum does help ring seal which you give up when you run breathers. I like the closed system because it doesnt smell at stop lights and there is no chance of oil in the engine bay.

nhra686

Oil in your combustion chambers is NOT a good thing, especially if you a boosted. oil= detonation = holes in pistons. Vent it or, better yet, run a vacuum pump.

Ferocity02

iTrader: (60)

I run the stock PCV system with a check valve and catch can in line. Without it the fumes were too much when stopped at a light or in traffic. And then I ran a line from the passenger side valve cover to the turbo inlet to ingest fumes when in boost. Works like a champ.

allout06

iTrader: (11)

im another one who is running 2x -10an to the Jegs 9" catch can along with a breather on the passenger valve cover. hopefully it doesnt stink too much. o well. Racecar

I8UR4RD

iTrader: (16)

^ same exact setup here. I have seen pro mods running this sort of setup. prob the only way they can get enough pressure out when running 50+ lbs of boost.

Busa_rob

iTrader: (1)

Lets not forget negative crank case pressure allows for a few more hp because the pistons arent overcoming pressure on the bottom sides of them.

You can also achieve the same effect but putting. Check valve in your exhaust at a 45degree or smaller angle, and the exhaust rushing past creates a very strong vacuum. I like this set up better because it works better, no oil inside your ic pipes, and (if you have an exhaust that exits the rear of the car) should you burn a hole through a piston the crank case sees what ever boost you were making for a brief moment. That's enough to push a quart of oil or two in to your intake, or out the top of your vented catch can which can go on the ground in front of your tires and put you in the wall. Using the exhaust method will dump the oil out behind the car via the exhaust.

allout06

iTrader: (11)

Ya but u always smell burnt oil

NightmareTA

iTrader: (20)

I'm running the RX racing 3 valve catch can setup. Uses vacuum to pull vapors out under normal driving, and then uses the turbo intake to create a vacuum source for when under boost, so you always have suction pulling the fumes out. Seems to be working great so far, and wasn't too hard on the wallet either. A great catch can setup is crucial to a boosted car IMO.

itsslow98

iTrader: (18)

Mightymouse sells a can exactly like this for a little less money as well. He used it on his 8 second car so we know it works.

Detoxx03

iTrader: (14)

Running a RX Monster can with a 1LE style breather.

02sleeperz28

iTrader: (26)

I'll check out Mighty Mouse can.

MIGHTYMOUSE

iTrader: (59)

thanks guys you are right, there are definitely reasons to run a closed system, i have a 'canfaq' lower on this page

http://mightym0use.wix.com/mm-solutions#!mm-og/ca5m

Gonoma

iTrader: (15)

I'm a mighty mouse user!

The Alchemist

iTrader: (19)

MM catch can here as well.

Twin turbo c5

Never ran a catch can on any of my turbo cars. I always just vent the valve cover in tha atmosphere .

Tirefire

iTrader: (1)

In addition to MM catch can my tuner had to install a breather on the passenger side valve cover. He told me that the lines coming from the the back of the driver side valve cover where blowing off under boost and stated that the motor wanted to breath. He said one of the things he does for his cars is that he welds AN fittings to the valve covers so you can screw on the hose instead of having the hose over the fitting with a clamp as I had. I see now that MM catch cans have these AN fittings which should help. I'll try out the car as is for now and if it keeps blowing of the hoses I'll take the valve cover off and and weld on some AN fittings. I might also have to send my can back to MM to see if he can put some of the new fittings he has now.