New Release: Killer B Motorsport Dual Air Oil Separator
 

The Killer B Motorsport Dual Catch Can AOS system is designed to remove excess oil vapor from crankcase gasses before they reach your intake. Doing so keeps your intake and valves cleaner and maintains proper octane levels. We do this using a vortex system that is efficient without limiting flowrates, unlike baffled units.

Our Performance Dual AOS configuration places the AOS's infront of and behind the intake manifold. This setup is intended for high performance track use.

-Light weight
-3D printed from automotive grade reinforced plastic
-Comes in Single or Dual configuration
-Looks OEM
-Easy to drain
-Installs in less than 20 minutes

https://killerbmotorsports.sharepoin...qbNgA?e=DQ9B6h

https://killerbmotorsports.sharepoin...pIiWQ?e=yJLlWa

Single $129
Dual $249

Might want to fix the " duel" at the bottom to read " dual".
I think emptying is also a consideration people may make with their purchase, are you planning on adding detailed information on what the dual setup looks like, how draining works? OEM looking parts are really awesome, I wish we had more. Sometimes a loud aftermarket piece is great, but I think "HEY, my car blows so much vapor past the rings I need something to catch it!!!" isn't something I'd want to scream

But they're competing to see which catches more oil. :fighting0040:

Can i check what the plastic material is? Especially in relation to high engine bay temps and hydrocarbons (which are actually strong solvents for certain plastics).

Dual? Where does the 2nd one go? Valve covers or pvc?

Good catch and sorry about that. Us engineers aren't known for good spelling, or grammar. So, I always welcome the often much needed critique :)

Yes, more pics coming and on our site we have detailed install instructions too. Super easy!

Very true!!

It will mostly depend on the application. Track guys will fill the front one more, street guys the rear. Both is always best for all around.

Fiber reinforced PA12. We've used a similar design on a sister companies product for Porsche 911s. It's right next to the right head, and inches from the often glowing right header. Been in use for years without issue. Here's a pic on a 911...

https://killerbmotorsports.sharepoin..._VguA?e=YFdUFE

Right behind the manifold, between manifold and PCV. pics coming soon! The head vents are off the front port.

Any downside to putting them on a 1st gen?

Here's the rear one. This unit is what does it's work under low load conditions.

https://killerbmotorsports.sharepoin...dFhMQ?e=CaKdLf

https://killerbmotorsports.sharepoin...H5FIQ?e=jjn91b

Fitment has not been verified yet. Looks similar, but from pics I believe the rear hose size is different? The front routing looks a bit different too. I'm sure it can be installed with some hose/coupler adapters and creativity, but I don't think it's 100% plug-n-play as is.

Function wise, both cars have the exact same PCV layout, so this AOS setup will function and perform the same on a 1st gen too.

Any testing on how often it has to be drained?

I know it’s somewhat dependent on the vehicle itself, engine health and how the motor is driven, but most catch can/AoS set ups are a bit larger to allowed for less frequent maintenance and draining

You're absolutely correct, it depends on many factors. What we recommend is to check at every oil change, and after every track event.

If the car is built loose, worn, or thought to have a decent amount of blowby, sooner than later would be a good place to start. Maybe as often as you check the oil level. Thankfully, the drain valve on the bottom is pretty easy to drain :)

Could they be mounted more remotely? Like having 2 of them mounted up by the battery, or do they need mounted closer to the outlet source to work properly?

It's not an option we offer, but definitely. Mounting location, bracket, extra hoses and clamps and you'd be good.

We didn't go this route for a couple of reasons. One is that the units are light and don't require additional support. Another is that PCV lines will remain clear and clog free the shorter and closer to heat they are. So tucking them close to the engine keeps accumulation more liquid and less likely cool, condense, solidify, and cause a clog. Although, for anyone that is over the top about maintenance and inspecting these things, this would all be a non-issue.

The main reason I ask, is for the ability to run an auto drain back into the passenger side head where the vacuum pump would be on an automatic car.

Is auto drain back a good idea? Wouldn't that create a positive pressure in the AOS that would counteract the vacuum extraction of the oil vapor.

One way check valve, there is one on the market, though I am not going to link it on another vender's thread.

It's the main reason I ditched my previous catch can, it was too long and it essentially created a P trap.

@NoHaveMSG: "there is one on the market, though I am not going to link it on another vender's thread."


I didn't realize Ewoks could be so considerate.

Our Turbo EJ setups have a drain back, but the FA is a very different animal. You're not puking out 1/4 quart on acceleration or a hard corner like with an EJ. The FA accumulates a couple mL over a long period of time. Internally, the FA crankcase baffling is far superior to the EJ.

You can drain back any AOS system, but you have to consider the risk/reward of going in that direction, because 90% of the time when an AOS has issues, it's in the drain back.

I get what you are saying there. The issue I had with running a catch can is our engines just don't puke that much oil. So it became something that I would skip in my checks before a track day after never seeing anything in the can after half a dozen checks. So I was looking at something more install and forget on top of your design being very compact. Though in conversation with @blsfrs he did mention the good point that you wouldn't know what it was puking if it drained back on it's own.

I understand where you're coming from now.

I don't know what unit you were using, but our vortex design works quite a bit better than most. Cans, swirl pots, baffles, and media filled units, generally work well under more specific conditions whereas our units work well over a much wider range of flow. Did you happen to test for what may have been getting past the can you were using? There's a couple of different ways this can be done if you're interested.

From using this design with the 911 market, accumulation varies a LOT based on several factors. We have some customers that drain it every other oil change and get very little (~6,000 miles) and some who drain after a track day and get a significant amount. Based on BRZ FA24 Alpha and Beta testing, we've found the accumulation to be less than what we see on the 911s. Which makes sense because the 911s have a higher output and are turbocharged.

Functionality wise, the units work very well from a separation standpoint. As far as historical data, we started testing nearly immediately after the new gen became available, but that really doesn't tell us anything as far as how these engines change blowby characteristics as they wear, increase power due to mods, E85, turbocharging, etc... This is why we offer a single unit, dual, and for draining on the conservative side. Many enthusiasts are over maintainers, and the couple minutes it takes to check the drain is minor in comparison to the time it takes to change the oil.

Another option, which we offer to the EJ market, because some don't like draining the goo back into the crankcase and the EJs have LOTS more liquid oil coming out of the crankcase, is a remote reservoir off the drain. The plus side of doing this is it doesn't affect functionality of the PCV system like a drain back can, and you can easily make the reservoir capacity multitudes larger than what the unit itself holds.

BLSFRS does make a good point that you have no idea how much is coming out if it's draining back. Short term changes in blowby is almost always an indication of an underlying engine health issue.

It's an ingenious design, very compact.

Here's a vid from smedia...


https://youtu.be/LFyOx_bSoQo?list=LL...gqFpTZmQ&t=806

Skip to 13:45 for the AOS install.

Thank you!

That link was supposed to start at that point but YouTube is not cooperating :mad0260:

I forgot to mention that we did a quick test. Both AOS were drained before Wicked Big Meet. The round trip was about 1k miles highway miles. Upon returning we drained about a tablespoons from the rear AOS and a teaspoon from the front.

https://killerbmotorsports.sharepoin...54v0w?e=HgYXoW

We just replenished our inventory, no waiting, woot woot! :P

Another 3K miles, another little puddle out of the rear AOS. Nearly all street/commuting miles...

https://killerbmotorsports.sharepoin...Yh_dg?e=uk2jcf

Do these cars have that much of a buildup issue? I'm coming from a 2010 mini cooper where a catch can was kind of required.

This depends on who you ask. For those that want all the internals clean and no chance of knock, and optimized performance (real, theoretical, or otherwise), it's important. Others feel it's not important. Really depends on where you fall on that scale and your budget tolerance.

PSA for those not on our mailer. We're having a 20% off Black Friday sale on all oiling products. Thanks for the support!

We have these back in stock. Thanks everyone!!

If 3,000 miles worth of separated oil is one forum-standard "puddle," what's the capacity of the AOS? Enough for the recommended oil change interval, absent track use?

We always recommend checking the drains at each oil change or after a track day, until you establish a baseline that is specific to you. Varying environmental, driving style, engine wear, oil type, power level, etc... will all play a role in how much you collect.

You might find that you can drain every other oil change, or if you just commute and drive like granny, you might be able to get away with once a year.

I'm home right now and don't have the max capacity handy but draining every oil change and after a track day, you should come nowhere near the unit's max capacity.

One extremely important thing worth noting is that in cold climates, these(catch cans in general) have a potential to collect a lot of moisture that will smell like gas. Do not let it get full

These units are not open to atmosphere. The only time you would smell gas, is when you drain them.

Sorry- I wasn't inferring they smell normally, just when you open :)

I just did an HPDE today on a CCW course with mostly high speed sweepers. After my last session, I parked for ~25-30min before leaving. Upon starting my car to leave, I observed a cloud of blue smoke on startup. It cleared up pretty quick so I immediately thought of this issue. When I got home I popped the intake and sure enough, a small amount of oil at the bottom of the intake tube.

So, based on my experience I would say yes. FWIW my car has a touch over 1000 miles, 2023.

I will probably give this solution a try.

No one likes the dreaded puff!

Thank you for your patronage. If you have any questions about the product or install, please don't hesitate to reach out to us.