Air oil separator
 

Anyone using an air oil separator ?

Been reading up on them and they sound like a good bit of kit.

I like the idea of it increasing intercooler efficiency by reducing the amount of oil deposited into the intercooler and intake system. And also reducing the likelihood of detonation also.

worth doing anyone ?

Made a big difference

http://clarkdh.net23.net/images/TomiokaRacingAOS.JPG

I'm hearing good things about them. ive read that you need to buy extra bits for them, what bits do you need for them to work don ?.

which brand did you go for ? Perrin sell one.

cheers don :thumb:

https://forums.nasioc.com/forums/sho....php?t=2227424

This and the similar Prova version appear to be discontinued. Nearest to it would be the Grimspeed or you are looking at a catch can

Cheers buddy I'll take a look

I have one ready to fit, albeit with a front mount. When you connected the crank breather did you leave the PCV connected to the crank breather or not?

Yes, just cap the connection to the turbo inlet pipe.

The crank breather tees so one pipe goes to the inlet pipe and the other goes to the PCV screwed in the back of the inlet - are you saying you disconnected both...

No, the connection to the PCV remains the other branch now connects to the AOS (shown joining the line from the head breathers in my picture) and where it used to connect into the turbo inlet pipe is capped as per fitting instructions.

Tomioka Racing AOS Fitting Instructions.pdf

Cheers, I was looking at deleting the PCV; I know the car ran with it un-plumbed for a while until I spotted the hose was disconnected but I'm not sure how the car will run with the valve removed from the inlet. It needs remapping anyway with the other changes I've made...

I just prefer a baffled catch can interrupting the normal lines back to the turbo intake pipe. I've always run two, one for the heads which always remains dry, the crankcase one is always dry, road and track but takes oil on launch starts at the Pod.
Trev

Is there anyone else doing these cheaper than grimspeed

I've one on eBay if u search, £100

Found it 5days left on auction

Is it bad making that it return into oil cap , is it contaminated oil?

Only if your piston rings are in such a state as to be passing products of combustion.

All you are doing is removing the oil droplets formed in the crankcase air volume, above the oil level, by the rotating elements and any oil being sprayed about for cooling.
Returning to the sump or collecting externally is better than burning it (unless you are in F1 ;) )

Thanks Don how long have you had it fitted , I'm very interested as its cheap and simply install with less hoses did you get it from America?

Mine is a Tomioka Racing one (same as Prova) - supplied by Pro-R Racing (Crossroads garage Treddington) and has been in use since January 2012
Since fitting, oil consumption almost zero and intercooler internals remain clean.

http://clarkdh.net23.net/images/TomiokaRacingAOS.JPG

It's listed on the TR US site but afaik it is discontinued
https://www.tomiokaracing.com/produc...tor-for-subaru

same goes for the Prova version

https://www.rallysportdirect.com/par...-oil-separator

yeah that's it.

I've got a perrin ready to go on, but I'm slightly concerned about it clearing the strut bar and still being high enough to drain.

Empty your inbox mate

I'm about to pull the plug on this one

https://www.vipmotorsport.co.uk/shop...-Separator-AOS

I appreciate it's expensive but from the research i've done it seems to be one of the best out there, VIP Motorsport are doing a black friday at the min with 10% off so it brings the price down a bit, any thoughts ?

where does it mount? only one id seen that like before was the crawfords one and it was LHD car fitment

i sure as hell wouldnt be paying £480 for one, youd be better off with a catch can setup or a oil filler mounted AOS for like a quarter of the cost.

i run a filler mounted AOS with the return plumbed into a small catch can soley in case of surge

Few images of my setup

https://cimg0.ibsrv.net/gimg/www.sco...108bb2b20d.jpg
https://cimg9.ibsrv.net/gimg/www.sco...a24dd9c06b.jpg
https://cimg1.ibsrv.net/gimg/www.sco...7105d6d49f.jpg

Hi Gambit

Thanks for the photos, yeh the IAG one with being made for the US market so is designed for left hand drive vehicles, it's just the mounting bracket that needs adjusting apparently, VIP motorsport who are based near Ellesmere Port said that Chevron Motorsport who will be working on my car soon have fitted several of these, yeh it is expensive i agree. I'm not sure i could fit what you have in that same location as i have a large aftermarket overflow tank in that area, you'll see the yellow cap in the pic where it is. Before i pull the plug on it i'll speak with Simon at Chevron to see what he suggests.


https://cimg4.ibsrv.net/gimg/www.sco...2f30d59d6a.jpg

"Before i pull the plug on it i'll speak with Simon at Chevron to see what he suggests."

Good idea :) id say a decent catch can setup even with a return to sump will be money wiser spent

RCM Track Attack would be far better / cheaper option...........

Will it fit 2008 onwards, as it states up to 2007?

thats simply because they have made the 'kit' on that car.........there is little difference in the scheme of things on the engine bay of the Hatch cars just that maybe you will need to play with pipe lengths and mounting position slightly