obd2 ls catch can

ok guys i have a 95 ls with a obd2 b18b1 meaning is doesnt have the black box so the pcv valve in up top on the valve cover. my question is how do i ventilate the crank case pressure with a sealed catch can. ive been trying to search this but cant find anything for a b18b1 obd2. please and thank you in advance

The same way you would if you had the breather box. Route PCV hose into catch can. Allow catch can to breath to atmosphere by leaving the other port open on the can. Thats it.

wouldnt that make the car idle high as if it was a vaccume leak?

wouldnt you rout the other side to pre turbo?

nvm just kidding i understand now idk what i was thinking. gonna take the two ports on the valve cover hollow out the pcv sinc eit fits in the hole nice and t them together. plug the im port and the run it to one side of the catch can. thanks alot muckman

You CAN route the catch can output port to pre turbo. It aids in evac of crankcase pressure however you will ingest some oil vapor and stuff that is generally bad for combustion. The catch can will trap some but not all. I prefer to vent it to atmosphere.

Ditch the PCV fitting all together and get a 90* barb fitting from the hardware store. It will flow more than hallowing out the existing PCV fitting.

Also some people remove the 14mm hex plug on the back of the block (where the black box would be) and put a second hose to the catch can for additional venting. Youd need to get a fitting for that.

for the back of the block venting are you talking about the fitting they use off the preludes? ive read somthing about them draining oil out of the engine do to their location or maybe that was the freeze plugs.

do you have a link to a barb fitting your talking about? not sure how to fit a fitting into that hole.

There are these OEM fittings which are hose barbs or if you want a threaded fitting several companies sell them. Its a standard M28 such as Xenocron.

http://www.xenocron.com/series-block-fittings-p-613.html?osCsid=8gpgthh76un85d4sp99hbkifc7

What's the fitting I can use in place of the original pcv valve on the valve cover

Just a regular plastic barb fitting and a rubber grommet.

Like this but in the breather box. Similar example.



More extreme, but you get the idea. Do that in place of your existing PCV.

what do you then do the line that goes to the head from the black box if you use two barb fittings?

In that case both hoses from the black box would go to the catch can. I assume its for extra flow bc the port on the back of the block is so much larger than the single hose. Thats not my picture so Im only guessing.

ok cool im just gonna do the vetilation from the head for now since its not s high hp set up or alot of boost. thanks alot for clearing it up for me

You're welcome, good luck.

What does the barb for the old pcv look like and where do I get it I went to lowes and oreilys and they didn't have anything.