STELAN Aftermarket AOS

[NewArt]

Oops, did I miss something. I ordered one of your systems for my car, which is a 3.2. Is this going to work?

[stelan]

Originally Posted by NewArt

Oops, did I miss something. I ordered one of your systems for my car, which is a 3.2. Is this going to work?

i have not tested it in a 3.2, it would be cool if we can see how it does, and if modifications in the volume are needed, do you want to help me getting it dialed in once you get it?
Let me know
Thanks

[itsnotanova]

Originally Posted by stelan

i have not tested it in a 3.2, it would be cool if we can see how it does, and if modifications in the volume are needed, do you want to help me getting it dialed in once you get it?
Let me know
Thanks

I have a 3.2 you can use for a lab rat.

[stelan]

Originally Posted by itsnotanova

I have a 3.2 you can use for a lab rat.

Thanks Woody, that is would be awesome, I will come visit you

[itsnotanova]

Read the last two pages of my build thread to see what you're getting into

[jb92563]

I'm impressed with the knowledge sharing and cooperation of you guys.

Had no idea the lowly AOS had to fit so many operating parameters.
I guess its more than just a simple oil trap.

With any development your going to run into some bugs and it encouraging to see that the potential pitfalls have been identified so fixes can be worked out for version 2.0.

Looks like you could have 2+ versions going forward for the different displacements and oil drain arrangements.

Keep up the great work, cooperation and knowledge sharing, that's what makes this forum so awesome along with the fantastic and brainy members.

[Gelbster]

"A stand alone data logger with a 2 channel manometer is the best tool for this job, so you can plot the vacuum changes in inches of water values. Overlaying that data with fuel trim plots gathered at the same time, and MAF signal can help see the real story of the changes that you made"

Seems Jake has done way more testing of the AOS than anyone at Porsche !
Now I understand why he was able to identify the problem of defective , new ,OEM AOS units.
For the good of the environment, the CARB and EPA should be encouraging such developments ,not obstructing them. Who else is going to develop effective emissions control equipment for a micro-niche vehicle for which the emissions warranty has long since expired ?

[steved0x]

Originally Posted by NewArt

Oops, did I miss something. I ordered one of your systems for my car, which is a 3.2. Is this going to work?

Same for me (2000 S with 3.2). Maybe "it" above is referring to the other aftermarket system?

I "think" that up through 2002 our cars use the same AOS (99610702304), then in 2003 the inlet to the block got bigger to let the oil drain faster, so that AOS has a new part number (99610702601) and that maybe some of the hoses are a little different too across the years and sizes.

[stelan]

Originally Posted by steved0x

Same for me (2000 S with 3.2). Maybe "it" above is referring to the other aftermarket system?

I "think" that up through 2002 our cars use the same AOS (99610702304), then in 2003 the inlet to the block got bigger to let the oil drain faster, so that AOS has a new part number (99610702601) and that maybe some of the hoses are a little different too across the years and sizes.

yes to fit both hoses configuration will be a little different I will include both variations hose sizes, the volume on both OEM AOS does not seem to be that different and easy to compensate with hose lenght so we can use the same vessel that fits well in the engine compartment in the mean time I will test it in my friends 3.2.
this AOS drains into the block via the large block opening so I don't see a problem.

[Gelbster]

If there is a LTFT problem for the 3.2L engines+Stelan's AOS, it will set a MIL code of 017x
Depending on which specific code is set(rich/lean) would help decide what mods to make for the 3.2L The specifics of short/long term fuel trim would obviously be relevant
Good luck finding the tweak necessary to make this work for the 3.2L M96
* For the 3.2L M96, just use the Audi part # 06E103245E -which is the PCV used on the Audi 3.2L engine?It blows the budget but the diaphragm is replaceable!
https://www.ecstuning.com/b-genuine-volkswagen-audi-parts/pressure-control-valve-pcv/06e103245e/

[emore93]

I've got a 3.2 too. Will this be an issue?
I'm not quite clear.

[stelan]

Originally Posted by emore93

I've got a 3.2 too. Will this be an issue?
I'm not quite clear.

I'm hoping it will not with the adaptations needed but I will know for sure based on some tests in the next few days, If for some reason I can not make sure it works then we will consider it a 2.5 2.7 part only and I will refund the 3.2 guys, no worries. thanksgivving holiday will give me and a few days to play with it.

[Josephjochoa]

I have a 3.2. Any updates? Has anyone replaced the AOS hard plastic accordion hoses with rubber or silicone? I broke the lower and can’t get a new one on without taking the entire top off. If the hose was flexible I could do it in minutes.

[BYprodriver]

[QUOTE=Josephjochoa;562725]I have a 3.2. Any updates? Has anyone replaced the AOS hard plastic accordion hoses with rubber or silicone? I broke the lower and can’t get a new one on without taking the entire top off. If the hose was flexible I could do it in minutes.[/QUOTE


What year engine ?

[maytag]

Originally Posted by Josephjochoa

I have a 3.2. Any updates? Has anyone replaced the AOS hard plastic accordion hoses with rubber or silicone? I broke the lower and can’t get a new one on without taking the entire top off. If the hose was flexible I could do it in minutes.

Here's mine (below). I used clear, and put the large loop in it to hopefully catch any liquid oil that would otherwise cause the dreaded "smoke bomb" at the track. If I pop the hood and see oil int he loop, it's a very easy task to remove it, drain it / wipe it out and reinstall it.
The first effort was simply a nylon-braided-reinforced hose.... but once it was warm, it collapsed under the vacuum. This is a wire-reinforced hose and seems to be holding quite well.

[steved0x]

Originally Posted by stelan

this AOS drains into the block via the large block opening so I don't see a problem.

Can you share more details, the screw and the rubber plug blocks the original small return opening, can you share more about the new bigger location for the oil to drain to?

[stelan]

Originally Posted by steved0x

Can you share more details, the screw and the rubber plug blocks the original small return opening, can you share more about the new bigger location for the oil to drain to?

Original 2.5 and 2.7 AOS drains thru small opening in the block that proved to be a design issue as it does not drain fast enough under certain conditions, this small opening is not used in the stelan AOS as it drains thru the larger intake at the bottom of the manifold. that is why the small opening gets blocked by the plug.

On the 3.2. 99610702601 (later larger drain AOS) I will have the manifold drain thru both larger intake and original larger drain locations for even better oil return as the larger displacement is more demanding. the R&D I have is to do is to make sure system volume is appropriate for fuel trims, etc.

[Gelbster]

Stelan,
Sounds promising.
Just a thought - the PCV intended for a 1.8L VW may have inadequate vacuum flow for the 3.2L ? Use one intended for a larger engine? See Post 47 for the Audi Part #.
But a generic would be cheaper.

[stelan]

Originally Posted by Gelbster

Stelan,
Sounds promising.
Just a thought - the PCV intended for a 1.8L VW may have inadequate vacuum flow for the 3.2L ? Use one intended for a larger engine? See Post 47 for the Audi Part #.
But a generic would be cheaper.

good call however the 1.8t is well capable of flowing more than enough, that is not an issue. diaphragm in both oem 2.5/2.7 and 3.2 are similar, the amount of flow is dictated by the rapid opening and closing vibrations of the diaphragm based on TB pressure/vacuum signal.

[steved0x]

Originally Posted by stelan

On the 3.2. 99610702601 (later larger drain AOS) I will have the manifold drain thru both larger intake and original larger drain locations for even better oil return as the larger displacement is more demanding. the R&D I have is to do is to make sure system volume is appropriate for fuel trims, etc.

2003/2004 only right? Up through 2002 uses the smaller hole, even on the 3.2? That is what blocks us from using the larger Porsche "Motorsports" dual canister AOS, although I have seen one installation that did it somehow using a hose and a clamp, maybe they drained it to the larger place that you are using?