hi all,
Quite new on here but to keep it brief, what do you guys think of this idea for getting rid of the crankcase pressure



I am currently running a 2.2 ecotec with following mods

B207 with 2.2 crank, forged pistons and rods stage 2 LSJ cams,lightened flywheel and balancer delete, home build with vocky input on Dutch ECU software m62 3.1 pulley ported head, now also putting dbilas springs in, 630cc injectors

This month I will soon be adding a Harrop and LS4 Tb and 3" exhaust but would like to get your thoughts on the Pcv system idea before I do the upgrades as I'm currently getting a lot of oily deposits in my intake system and supercharger and probably the intake laminovas are covered
Cheers and look forward to hearing thoughts

 

My buddy has a setup similar to this on his mazdaspeed6. Do you have a cat?

 

No CAT essentially a trackday car

 

Does it work well

 

its been done
summit racing sells a kit for it
"Moroso Crankcase Evacuation Systems 25900"
http://www.summitracing.com/parts/mor-25900

 

Works well if setup properly.... but for the line going to the catch can, were you planning on putting a fitting on your oil pan? If so, I wouldn't recommend that. I would go off the nipple on the back of the VC orrrrrr run one of those oil cap fittings

 

exhaust evacuation of blow by gasses. as Axletherod05 says, has been done. Not that successfully in my experience. The problem with any VTA system that you are creating, is that you have to tune around what is basically a massive air leak. You are not drawing any vacuum because you are venting the rocker cover to the air. You would have to make a few holes some place to follow your idea in the drawing, but why dont you try it and see how it works for you? Let us know how it works out.

PS you want vacuum not pressure in the crankcase. Makes more power that way.

 

Thanks for all your replies

My thinking was that because of the vacuum from the exhaust it would automatically pull air in from the cam cover to replace what is being pulled out
In effect you are creating a motion of fresh air which is dragging all the crank gasses out almost straight away

So giving the engine fresh air when ever air is pulled out creating a open system rather than sealed oem one.


Tuning around this is not a issue

 

I was going to put a valve in to empty the catch tank back in to the sump after oil and crankcase gasses have separated when ever necessary

But as the crankcase gasses in theory are not building up in the system I'm not expecting much oil to get to the catch tank

 

Watch this space I'm going to give it a go

 

i tried something similar on mine; gutted the valve cover, tapped a new hole and plugged the other one, and ran the tube right to the exhaust post cat at a 30ish degree angle. we were hoping to increase horsepower this way. it didn't work well; i had a funky idle but that could have been related to something else. but yea it didn't really pull anything through.

 

I've read it's got to be 43-45 degrees to work

 

oh. or whatever angle it was i forget but pretty sure we had it right haha

 

all you need to do is to run a -10 from a vent on the valve cover to a good air/oil seperator then a -10 from the air/oil seperator to the air intake

 

Making a dash ten ( large, expensive) hose from a vent which has a 4 mm internal orifice in the rocker cover makes zero sense to me.

 

nothing that works makes sense to you and -10 isent that expensive

 

Wouldent speeding up and slowing down air flow help separation ?

 

The system design looks good but if you are running a full exhaust it will work poorly. The evac fitting at the header is designed for open headers or a short pipe after them. Another option is that you could use an electric air pump instead of the evac fitting.

It's not connected to the air intake in anyway. So there would be no air leak there or any extra tuning.

This also works good. Keeps the oil out of the intake.