GrimmSpeed Air/Oil Separator - Product Release
 

You want an AOS that breathes both the Heads and Crankcase? Check.
You want a compact AOS that will work on all models? Check.
You wan a AOS that is not overpriced? Check.

https://www.grimmspeed.com/catalog/p...roducts_id=191

http://www.grimmspeed.com/images/pro.../aos_600_1.jpg

PRICE: $299.99

An Air/Oil Separator has one job, remove the oil from the engine ventilation system so the oil does not get sent through the intake system.

The GrimmSpeed AOS is unique as it allows you to maintain your PCV Valve while separating the oil out of the crankcase and head ventilation air! Our AOS will allow your engine to run more efficiently due to the separation of oil from the intake system. When there is oil in your system, the result is 1) reduced fuel octane 2) higher chance of engine knock(detonation) 3) worse emissions 4) higher oil consumption. Our AOS will solve all of these problems.

In GrimmSpeed fashion, we have made a very compact unit that packs a powerful punch(and looks good while doing it)!

No more having to check/empty your catch can and refilling your oil. The GrimmSpeed AOS coalesces oil without using a mesh media. Mesh medias can cause contaminates to collect and build up resulting in possible sludge. Our AOS is self maintained so you can just sit back, stop worrying, and enjoy driving your car!

Replaces oil cap for a self-sufficient design that requires ZERO maintenance!

http://www.grimmspeed.com/images/pro...iagram_600.jpg

http://www.grimmspeed.com/images/pro.../aos_600_4.jpg

http://www.grimmspeed.com/images/pro.../aos_600_2.jpg

http://www.grimmspeed.com/images/pro.../aos_600_3.jpg

http://www.grimmspeed.com/images/pro.../aos_600_5.jpg

Installed pics...
http://www.grimmspeed.com/images/pro...nstalled_6.jpg

http://www.grimmspeed.com/images/pro...nstalled_7.jpg



https://www.grimmspeed.com/catalog/p...roducts_id=191


Justin

Is that thing as tiny as I think it is? It doesn't screw into the crank breather on the top of the block does it?

I've got a massive GST donkey-kong barrel AOS on my WRX... if this does the same job, that's mighty impressive.

It is a blatant copy of the Prova A/O Separator with an extra input line added:
http://www.iwsti.com/forums/how-inst...separator.html

The extra line input makes it superior to the Prova in that it has inputs from both the crankcase and the valve covers. I personally would be skeptical that turning the oil filler tube into the equivalent of a catch can that drains back to the driver-side valve cover is equal to systems by Element Tuning, Crawford, and Pro-Vent, but maybe.

It looks cool and is way cheaper than the Prova unit. The Prova unit still uses the stock oil filler cap where as this unit appears to replace it with a cooler looking cap. However, this cap looks like you will need a socket if you would like to put oil in your car and I don't always carry one with me.

Okay, now I'm confused... it looks like there's one input from the crank, and one from each head. But if the AOS doesn't breath to the intake or to atmosphere, how can it work? You can't just connect the valve breather back to itself, or it's not breathing anything. I also wouldn't want the crank pressure blowing into one of the heads either.

Shouldn't an AOS act like a catch-can that takes oil out of the blow-by gasses to drain back to the pan and then either release the oil-less gas to atmosphere or send it back to the intake to be burnt?

We've pounded on this topic quite a bit already... especially here.

Are we missing something about how this stuff works, because I'd be concerned running this AOS on anything that might have significant crank pressure from blow-by or anything that's going to see significant lateral Gs.

I assume one of the lines, prolly the middle one, goes to the turbo inlet. I assume the head lines get tee'd together. This device is supposed to let the oil drop out and flow down the filler tube.

That's how it looks to me. Kinda clever actually.

Now that I look at the prova AOS again, I see what you mean. I haven't had a TMIC in a long while, I forgot those hard lines along the intercooler are from *both* heads.

So this setup is basically the top type of catch can in this picture:

http://www.seccs.org/gallery/Car%20P...catch-cans.jpg

...but with a drain-back to the heads.

The problem is that there is likely going to be the possibility of crank pressure blowing out the heads (and thus pumping oil out the heads) because the crank breather is the same size as the valve breathers. I don't know how good that separator is... if it can't handle a heavy stream of oil, you may be blowing oil right into the intake. Probably not going to be an issue on a street car, but on a race car that can sustain 1+ lateral G's, I'd be concerned, especially if I had WRX heads with the single breathers.

The way it looks like it works is... The blow-by comes in the the two lower/outer nipples and then is funnelled down a port to the filler tube. It then separates (prolly not completely) and returns up the device and exits the higher/middle nipple and out to the intake tract. It is clever, but no more technically complex than a decent catchcan.

http://www.grimmspeed.com/images/pro.../aos_600_5.jpg

These are pretty strong accusations sir. Other than the fact that it mounts directly to the oil cap is about where the similarities end. We've spent a year designing, testing, redesigning, retesting this thing. The meat of this product is the internal baffling, ours has it, the other company has very little.

Justin

oh but i have good news about the socket cap on the AOS!! It is the same size as your lug nuts so as long as you have a way to take your lug nuts off(which you should always have), then you have a way to unscrew our AOS.

Justin

I do carry the key for my lug nuts so if you make me a cap that fits the key, we might be in business. :lol:

Yes you are correct on how it functions. We have found this design does very well at separating the oil out. IMO an AOS is soo much better than a catch can because it doesnt take oil out of the engine. catch cans you have to maintenance..you are continuosly taking oil out of your engine which of course is not the greatest for your engine. say you forget to dump out your catch can(and refill your oil) and it gets full of oil... you are now running with a bunch of oil missing which is no good.

Justin

I didn't mean to "accuse" you of anything, but come on, it's obvious using the basic Prova design, but with some apparent improvements. And being skeptical isn't the same as accusing.

What concerns me the most is the lack of size differentiation between the crank breather and the head breather. Perhaps it's not an issue on the STi due to the extra pair of unbaffled valve breathers on the STi's heads, but WRX heads will see crank pressure and potentially start pumping oil out the breathers if the crank breather can't breath significantly more than the valve breathers.

Just because all that oil coming out of the heads will get pumped back into the driver's valve cover doesn't necessarily mean it's not a problem.

IMO, if you've got a car that needs a drain-back catchcan/AOS, you've probably also got a car that has a big turbo and see's lots of lateral G's that needs separate crank and valve breathers.

Seems to me the breather line off the driver side head becomes superfluous, as the filler tube becomes a big breather line basically instead. Most of the blow-by in the DS valve cover will take the path of least resistance and head straight up the filler tube. Probably doesn't hurt to still run the VC breather lines together though.

Ok you just came off as though we just copied another company which is untrue. Yes i agree it looks and installs similar to the other one, but from a functionality standpoint it is very different. Nothing wrong with skepticism..its a new product. thankfully we have been doing testing for over a year now so it isnt very new to us over here :)

Oh and i'd like to add we had this in 15 different testers hands for the last 6 months on all types of setups ranging from stock setups to 500hp setups and it worked very nicely.

Justin

I've heard you mention this before, and I dunno is I buy that. The difference between a 5/8" line and a 1/2" line is not much, and the crankcase breather line has a significant (and obviously on purpose) restriction in it near the PCV valve.

and just to reiterate..no worries at all knucklesplitter, its just that i got done spending a TON of time and money designing this product and the last thing i want is to be accused of replicating another product. so maybe i'm a bit sensitive right now ;)

Justin

Yeah, you may remember I was skeptical about your MAF block-off and ended up being totally wrong on that.

I understand, Justin, but I guarantee people will be saying you "copied" the Prova concept of using the breather tube, which maybe was not an original idea anyway. Prova's is really too pricey and is just not worth it anyway for several reasons.

The whole line size for breathers has always seemed like voodoo to me, but I've had 1st hand problems with oil pumping out the heads, and the line size was identified as part of my issue.

Also. 5/8" ID is 50% larger in area than 1/2" ID (0.307 in^2 vs. 0.196 in^2). That's pretty significant. And that restrictor is not in line with the breather, it's only in line w/ the PCV, is it not?

No it is in line with the crankcase breather line and the PCV valve. In other words it necks down before the tee-off of the PCV valve.

Hrm. I don't remember that on my car... is that just for the STi?

Either way... I don't have a PCV any more as it is... just a giant AOS that vents the crank and valve covers to atmosphere. Everything else I tried just didn't keep up with the crank pressures and G's the motor was seeing at the race track.

No, I believe the part #11819AA001 is the same on the WRX too even in 2002. But yeah, high-G racing is a whole 'nother animal anyway.

Installed pics...

http://www.grimmspeed.com/images/pro...nstalled_6.jpg

http://www.grimmspeed.com/images/pro...nstalled_7.jpg


Put them in the first post too.

Justin

Justin,

I've always heard on all of the Subaru forums I frequent that you need 2 seperate AOS/catch cans. How did you get around that?

I believe what they are saying is you need two catch cans, one to "catch" the heads and one to "catch" the crankcase.

Our AOS does both in one.

Justin

They're saying that the cans have to be seperate or bad juju. I'm just wondering if you've done something different with yours that makes this irrelevant?

http://forums.nasioc.com/forums/showthread.php?t=754710

yeah we are using the other hose fitting on the inlet hose for the crankcase and heads so we are able to cap off the hose fitting on the inlet that is close to the turbo. you only need to run our AOS to gain the benefits they are speaking of.

I thought of another question. How do you check your oil?

This goes on the filler cap not dip stick. You just have to use slightly longer/different routed hoses. :)

I think Joel was pointing out that in the installed pic above, the hoses seem to be blocking one from removing the dip stick. I'm sure you just have to remove the AOS before you check the oil.

Or use longer hoses and rotate it so they clear the dipstick.

I would need to see an installed pic. I wouldn't want to run more hose the necessary and or create a low spot. It would be a pain in the butt if the unit needed to be unscrewed and moved each time I wanted to check my oil.

Looking again, it looks like they could just rotate it 45 degrees clockwise with the current routing.

this is exactly correct. it was probably not the greatest picture to take for you guys of it installed because that is our track car and it doesnt have an a/c compressor so mine faces more left than the normal setup. most setups will have the AOS rotated clockwise more so it will not be covering the dip stick.

Justin

If it was rotated clockwise more then your company name would be upside-down.
http://i3.photobucket.com/albums/y62/thumpyJ/worf.gif

the AOS shouldnt be pointing straight up so it should still be legible :)

:lol:

Just flip the text over on your next batch... and tell people to install it straight up. Then you can run the breather lines up along the intake manifold over the back of the alternator rather than across the front of it. Should make for a cleaner install. In fact, I'd install it that way even if the text is upsidedown.

haha, yeah that is the plan. we had to place an emergency production run for another 100 to try and keep up with demand, we will change it on this batch. not a big deal.

oh yeah it can be installed pretty much any direction you want, that is one of the nice things about it...very flexible configurations.

I think you need to send one up here to SECCS so we can help you work the bugs out. It should also be tested at elevation. ;)

I know this is for the nasioc group buy, but since it is to help out the Haiti victims I wanted to cross post it.


SPECIAL NOTE: GROUP BUY WILL BE CAPPED AT 200 - Spot 200 will go to Haiti Relief

This is how we are going to handle the last spot.....

Spot #200 will be a auction style spot, 100% of the final sale price will go to the American Red Cross Haiti Relief Fund.

http://forums.nasioc.com/forums/show....php?t=1916975

Thank you very much for posting it over here!

I would never have seen it there. Can I have some large stickers to go on Magnets for races?

And any chance I can get some Gaskets added to the order?

I am #186. You better hurry up if you want in at $199!!!!!

here is a picture that one of our customers sent us(i added the text). he used all clear lines because he wanted to keep an eye on it to make sure it was working as we claimed.

a large part as to why it is so efficient at separating the oil out of the air is because of our internal core design. we spent over a year refining the core design. this is why we are able to have a very compact system, yet still is a very effective separator.

http://www.grimmspeed.com/images/pro..._hoses_600.jpg

Justin

I'll be interested to hear if oil consumption is affected by running these.

I would think it would reduce it since it is not routed into the intake.

I have mine, and it is pretty cool. Now if I only had an engine to attach it to. :)

I have this installed on my car. I love it. works awesome. I don't notice any oil consumption with it.

Yeah it should greatly reduce oil compsumption. We have many customers that are stating they have noticed much lower comsumption after they installed the AOS.

Justin