Grimmspeed Oil/air Separator

[ezy_09s]

Yes i realise this was a subaru unit ..but i curious to see if anyone have used these before or have input on their effectiveness.

As both heads/crankcase are vented and still retains the pcv.

http://www.grimmspeed.com/catalog/product_...products_id=191

[Roy]

Housemate is a Subie boy and says a good number of club guys are running them with happy owners

[Randon_I_Am]

hmmm yeah these look pretty good. I'd be interested!

[SLY-25T]

might be silly question but where does this screw into? replaces the oil cap?

[Dobz]

I also want to know this ^

[GTR1993]

Looks like it does replace the oil fill cap. Thats how you "never have to drain the catch can".

[bubba]

Will it fit on an RB?

[Dobz]

It looks like it's only meant for suby's. Do suby's have the sump separated from the crankase because it's a flat 4?

[bubba]

Suppose it would be wishful thinking for Urabus and Neesan to share the same filler cap thread

From what I can tell, it has two inputs and one output so you could run it on your RB while retaining the PCV valve (both cam breathers to unit, unit to breather return on intake).

Whether the bonnet would close though.. certainly wouldn't in my 32! (bonnet barely closes over the timing belt cover)

Edited October 25, 2010 by bubba

[Beer Baron]

can't see it working on an RB engine. sure the cap may fit (think oil filler cap is the same as subaru) but the thing is. on a skyline we vent crankcase gas from the cam covers. oil filler cap is where? you guessed it. on the cam covers. It may kind of work I guess if the vapour can feed from the two points into this thing and then out it's single outlet to your intake piping. but considering the bottom of the device will be under the same pressure as the two breather hoses how could anything 'flow' into it? I think the difference is on a subie the oil filler cap is going directly to the (vented) sump so there is no pressure on the underside of the cap. not the case in a RB nissan.

[bubba]

Hmm good point..