toddk911

dude, you are on fire with instals lately.

You should move close by so I can come home and see parts already installed on my car. lol

toddk911

So other than the look and drain capability, this operates the same as the stock AOS?

As the stock unit just routes the oil vapor right back into the intake then it is not really "separating" is it?

Also, do you not suggest a breather?

Chris White

It operates the same way as the stock AOS – except that it does not get overwhelmed. The stock AOS does a good job up to a point, and then gets overwhelmed and it just passes the oil mist through to the intake.
The whole concept of the stock system is that the crankcase can be under a slight vacuum – this is a good thing for ring seating and oil drain back from the turbo. If you take the oil filler cap off a stock engine while it is running you should notice a change in the idle – the same thing will happen if you run an open breather.
Also important to note – I believe that if you are really cranking out the oil vapor then the engine needs internal attention….just trying to fix it with catch cans is not really fixing the problem.

spyder348

any turbo car driven hard needs catch can keep the octane of the fuel up. especially bigger turbo users more boost my blowby gas. stock aos can barely handle 26/6

spyder348

todd off topic but got in touch with a great piping fab guy last nite specializes in evos and r32/r34 skylines does amazing work. my bet it can make some sickkkkkkkk 951 pipes. exhaust IC pipes intake. Im going to give him all the dimensions of everything and see what he comes up with. ran by last nite was running dyno on a twin turbo viper. 1050 rwhp. 1 day fabbed split intercooler system get more air flow to radiator to cool engine temp. 1050.....8hours later 1222rwhp. the dude is awesome. point being let me know if you want anything that you cant seem to find.

Chris White

Not really true. A 944 turbo in good health will not have an oil vapor / blow by issue. A lot of the engiens I do use the stock AOS system with a blow off vlave vented to atmosphere - and no oil vapor coem out at all - even in 3.1 race motors at the track.

A 20+ year old engine is a different matter...!

spyder348

average 951 or older turbo car without new rings and seals can benefit from a can.

azbanks

While putting in my AFM relocation pipes, I ran several days with the AOS hose disconnected. It was just hanging loose near the front of the intake. It was almost completely dry on the inside.

toddk911

Nice! PM me the details, cost, etc.

McLovin69

why not just do it old school and vent to the atmosphere. the EPA might complain, but oh well

spyder348

you want a vac. on the system just venting wont pull the crap out of the crankcase like it should. venting would keep it out of your intake but maybe cause a mess where the vent is and cause oil leaks else where.

TurboTommy

So, what's considered normal oil vapor on a fairly fresh engine?
Let's say at idle, oil filler cap off; one should feel air coming out, but dry?
What should you see and feel when reving it up a little?