AOS install: advice required please.

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Re: AOS install: advice required please.

Postby bigBADbenny » Sat May 21, 2016 7:33 pm

Check out Radium Engineering's AOS & CC options...
https://www.radiumauto.com/Blog/Post/Ne ... h-Cans-103
Intriguingly, they offer two solutions: dual CC for street, and a heated, drain to CCV, AOS with VTA or return to inlet config for track duty... All serviceable and upgrade able eg for extra capacity.

Dual CC routing:

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^ Vacuum state, v boost state...
image.jpeg
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Oil catch can setup:
image.jpeg
image.jpeg (77.9 KiB) Viewed 8696 times
Last edited by bigBADbenny on Sun May 22, 2016 6:18 pm, edited 3 times in total.
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Re: AOS install: advice required please.

Postby tom_kauf » Sun May 22, 2016 5:06 pm

Cool! 8)

Similar can design to the Mishimoto (from the outside anyway). About the same price too - although the Mishimoto ones can be bought from RallySportDirect for much cheaper than Mishimoto charge themselves.
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Re: AOS install: advice required please.

Postby bigBADbenny » Sun May 22, 2016 6:09 pm

^fixed the illustrations :)

Yeah indeed! I'll line up the illustrations for comparison at some point.
No mfg is filtering the CCV before the three way pre PCV joiner which makes me think I'm possibly on the wrong track with that idea... Could be a matter of convenience tho :P

Radium's AOS setup is much the same as Owens Cusco setup, which iirc he got from dr20t as installed by G88/Phat back in the day, a proven solution for street & track. Heads & CCV all run to the can with either VTA or return to inlet pipe. Iirc Owens might be VTA...
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Re: AOS install: advice required please.

Postby andy_mac » Thu Jul 21, 2016 11:21 am

Any opinions on the Radium AOS vs the Perrin alternative. Seem to have the same basic design with the only main difference being that the Perrin has a Y branch at the block with one acting as a drain and the other larger one as the breather to the AOS inlet, rather than the Radium one using the larger drain port as the block breather. Also the Perrin keeps the PCV but in a slightly different setup to stock.

Image

Image

Image

http://perrinperformance.com/attachment/117616-.pdf
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Re: AOS install: advice required please.

Postby bigBADbenny » Thu Jul 21, 2016 1:38 pm

The Radium single can AOS for heads and CCV uses the lower port for the CCV vent and drain.
Heads and return ports are at the top iirc.
Very simple setup similar to Owens old GT with Cusco can, proven to work on track.
His was centrally mounted where the tmic was.

The Raduim dual can setup has lower drain ports which use taps or route to sump.
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Re: AOS install: advice required please.

Postby bigBADbenny » Sun Jul 24, 2016 10:23 am

For the diy-ers out there I googled the sintered filters that the mishimoto cans utilise to seperate the water vapor and oil from the breather system :)
http://www.alliedfilters.com/sintered-mufflers.htm
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Re: AOS install: advice required please.

Postby bigBADbenny » Sun Aug 28, 2016 7:26 pm

Here's an update regarding oil catch can and AOS development:
Killer B has finally released their solution and it's great, very simply designed with heaps of flow, it has two top entries for heads and CCV, one upper large diameter return to inlet port, and one lower drain, no filtration.
http://forums.nasioc.com/forums/showthr ... ?t=2802170
The CCV port on the block gets a tee, the straight section goes to one of the top entries, the drain goes to the perpendicular entry on the tee.
If you buy this along with their race only one way valve http://forums.nasioc.com/forums/showthr ... ?t=2628337 that helps stop heads filling with oil in high G corners you'd be up for around 1.5g delivered :shock:

To me, it's fascinating that killer b favour flow over filtration, and recommend and require PCV deletion (mainly because it introduces a slight manifold measurable air leak, meaning this solution suits tight engines, eg regularly rebuilt and properly maintained examples as opposed to high k leaky old engines (imho)...

Gotta pay to play, people! See the links for moar info ^
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Re: AOS install: advice required please.

Postby muzza » Tue Oct 11, 2016 1:12 pm

Hokay - Ive ordered an SG Motorsports AOS for the Gen V. Call it a pre-emptive strike but in the fiddling around with the IC to TB hose (new silicone AVO item last installed), I was conscious of some oil in the pipe and IC, enough to wet the surfaces and form drops in places.
Cant be good for efficiency, octane rating or carbon buildup in the engine. car has 70K km on it, so not esp old!

So thanks BBB for the info in this here thread. Having done some Googling for Gen V fitment, there's not much out there, though it should all be pretty much same as MY15 WRX given the low mount twin scroll turbo set up, as well as the fact that the IC/manifold set up appears to be the same.

So I'm thinking the install should be pretty straight-forward: AOS goes on the Oil filler, after first clocking the two parts to ensure hole alignment and pipe in/out orientation.

Intercept head-breather crossover pipe, route to AOS, then reconnect back to crossover pipe. This is assuming I can correctly identify these pipes after removing the IC... :? No idea if I may need Y junctions etc?

I will also check the PCV valve is rattling normally and is free of any gummy residue - it will cop a clean out at the same time.

I'm working on the basis that the oil mist is only entering the pre-turbo intake pipe under boost/WOT when the crankcase is starting to be pressurized by blow-by, which will cause the PCV valve to shut and then forcing the blow-by out through the rocker cover breathers and into the pre-turbo intake pipe. With the AOS in place, the back-flowing oil mist/blow-by should deposit it's oil back into the filler, leaving mostly clean blow-by to return to the pre-turbo intake.

The rest of the time the PCV system should operate as normal, ie: fresh air drawn in from the pre-turbo intake pipe, (detouring via the AOS) then into the rocker-cover breathers, then air/blow-by out via the crankcase breather and CCV valve into the high vacuum area of the intake manifold.

I plan to take some pics and do a "how-to" as I go when time permits in the next couple of weeks.

Thoughts/discussion/correction of any of my delusions welcome 8)
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Re: AOS install: advice required please.

Postby bigBADbenny » Tue Oct 11, 2016 2:18 pm

Not sure about genV but generally blow-by can take 2 paths:
CCV into the pcv in the inlet mani under cruise/IM vacuum conditions;
and from the heads and CCV to the inlet pipe under boost conditions. Iirc the heads are connected, in the stock setup, only to the inlet, allowing them to flow in or out.

Heres an SG routing pic from the Tuningworx website.
image.jpeg
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So this setup, whilst it still utilises the stock pcv, should trap some oil mist from entering the inlet under boost, which is when it's needed to prevent detonation due to lowering the effective octane rating of your fuel...
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Re: AOS install: advice required please.

Postby muzza » Tue Oct 11, 2016 4:38 pm

Yes, that's a much better pic of the "after fitting AOS" and matches with what I understand to be the operation if you want to connect both rockers and CCV into the AOS. The Y junction is (I think) an addition with the kit.

And I think what you describe is how the normal system is meant to work. So when the blow-by is running out of the rockers under boost it brings oil mist back into the pre-turbo inlet, and coats everything from there through to the inlet valves in oil.

Got the AOS kit today and the instructions refer to what looks like an STi with it's fixed hard lines on the IC.
But no matter, its just a matter of what pipes need to go where.

The instructions allow for just rockers to AOS, or to add in the CCV additionally, presumably the extra connection would be ideal if you have LOTS of blow-by or are planning on sustained high speed operation?
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Re: AOS install: advice required please.

Postby bigBADbenny » Tue Oct 11, 2016 11:39 pm

If you let your car idle and remove the oilcap, you'll get an idea of how much blow by your engine produces under no load at all.

The SG AOS is a convenient street solution, whereas for example, the most extreme full race solution from KillerB utilises pcv delete, drains to CCV, heads and CCV vented to a baffle and filter less can and the option of a dual entry one way valve to prevent oil escaping from heads to AOS. In between are the dual can systems and single cans systems that also retain the PCV.
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Re: AOS install: advice required please.

Postby muzza » Wed Oct 12, 2016 7:19 am

bigBADbenny wrote:If you let your car idle and remove the oilcap, you'll get an idea of how much blow by your engine produces under no load at all.

The SG AOS is a convenient street solution, whereas for example, the most extreme full race solution from KillerB utilises pcv delete, drains to CCV, heads and CCV vented to a baffle and filter less can and the option of a dual entry one way valve to prevent oil escaping from heads to AOS. In between are the dual can systems and single cans systems that also retain the PCV.


Yeah, the options are endless, especially if your wallet is deep - :lol:
I think the SG will do me, I'm not racing, and I'll run the CCV into it as well if it's easily done, clean up the blow-by as much as possible.

From examining the SG unit, it looks like the upper port is the "clean" one and the lower the oily one and this appears to match the install instructions. Well made piece of kit with plenty of condensation area for grabbing oil.
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Re: AOS install: advice required please.

Postby bigBADbenny » Wed Oct 12, 2016 9:44 am

I'd say just don't over tighten the cap, ziptie the hoses so it stays aligned, then put the cap on with gentle tightness.
Make a paint alignment marker to be sure...
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Re: AOS install: advice required please.

Postby muzza » Wed Oct 12, 2016 5:43 pm

Have had a bit of a chat with Tuningworx, they suggest the alignment is not critical given the 360 degree chamber/gap on the inside between the base and cap allows flow regardless. Still I think your idea of clocking it to line the holes up and then marking is good.

Can't wait to have a crack at it but the weekend is busy, have to be patient...... :roll:
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Re: AOS install: advice required please.

Postby bigBADbenny » Wed Oct 12, 2016 9:37 pm

Good point, I guess the dual orings keep it sealed and separated :)
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