catch can

[J3wman]

how do you install an oil catch can?

[evil_demon_01]

Straight from google:

[J3wman]

so id hook it up where id hook up a breather filter?

[evil_demon_01]

From where the oem pcv is located yes.

[bcjammerx]

vc--->pvc valve--->oil catch can--->intake manifold

or...keep the pvc valve always clean of oil and do this...

vc--->oil catch can--->pvc valve--->intake manifold


Search on the forum...there are some good fyi's

OR...what I did...cause I'm cheap and lazy.

vc--->little filter from autozone

intake tubing--->pvc valve (plugged into intake tubing)--->intake manifold

course the latter results in a dirty little filter...but either way...I retain a ventilated crank case, and no oil in my intake.

[evil_demon_01]

Search results I found:

http://www.cb7tuner.com/vbb/showthre...ight=oil+catch

http://www.cb7tuner.com/vbb/showthre...ighlight=catch

http://www.cb7tuner.com/vbb/showthre...ighlight=catch

[bcjammerx]

One of my classic favs..so cheap and easy... like me?

I think hondafan81 has a very nice one he did.

[d112crzy]

You really don't need a can.

As long as the crank case is vented somehow, its all good.

I personally don't like using the intake manifold as a vacuum source becuase those fumes it's pulling back into the intake contaminates the combustion. It lowers octane, quite a bit. This causes less power and/or detonation if you're pushing enough power. The stock pcv system also lets oil get sucked back into the intake, which is just as harmful as the vapor.

[bcjammerx]

You really don't need a can.

As long as the crank case is vented somehow, its all good.

I personally don't like using the intake manifold as a vacuum source becuase those fumes it's pulling back into the intake contaminates the combustion. It lowers octane, quite a bit. This causes less power and/or detonation if you're pushing enough power. The stock pcv system also lets oil get sucked back into the intake, which is just as harmful as the vapor.

Which is why my pvc goes from intake mani to intake tubing...two small cone shaped filters on the vc...guess I could just block off the pvc's port on the mani instead.

Do you NEED a vaccum source for crank venting? What about for boost apps, what's the best way to vent the system?

[d112crzy]

There are 2 best ways to vent the system on a boosted setup, 1 being a lot more expensive than the other.

The first way is by using a vacuum pump. Just route lines to the valve cover and you'll be good.

The 2nd way is buy running lines off the valve cover, to a vented catch can, then run 1 line to a pcv valve slash cut into the exhaust. This will pull vacuum at ALL times, especially under boost.

Or do what most people do, just run 2 big hoses from the valve cover to a BIG vented catch can. Then run a drain line to the back of the block.

[bcjammerx]

I have have gained knowledge...awesome sir

[J3wman]

would an N/A car have any gain over a breather filter with a catch can?

[evil_demon_01]

would an N/A car have any gain over a breather filter with a catch can?

As said by D112crzy - "It contaminates the combustion. It lowers octane, quite a bit. This causes less power and/or detonation if you're pushing enough power"

Also another note to remember - the catch can tubing should be on a downwards slope all the time.
If they go down then back up, the oil will accumulate in the lowest part I.E the catch can should be the lowest part in the whole system.