The problem is not likely the turbo rather the oil pressure going into the turbo. You need to run nothing larger than -3 line and then you need a restrictor between the line and the turbo with an opening of around .050 or so.

Too much volume/pressure will blow the seals on the turbo and cause oil to leak from the housing out. If you ran -4 line then guaranteed that is the problem, some really good turbos can take -3 without a restrictor. My Turbonetics 60-1 on my Talon ran with a -3 alone and was fine. Though to do that I pull off the oil releif valve which is a valve after the oil pump the bleeds pressure off back to the pan at higher RPM and I ported it (in the same manner you port a 2 stroke engine) so it opens sooner and bleeds the pressure off. The new garrett ball bearing turbos need a really small restrictor on the oil feed line so the pressure is really low, they are very sensitive to oil pressure.

I have a lot of turbo and racing experience had have been through a number of turbos on my talon (trannies too) through my racing years.

Regards,

 

Thanks Jim for the info. Unfortunately came too late

I'm currently running a 1/8th inch line, not sure how big is that compared to the -AN lines.

Update:


Well I got into testing boost and figured out just where all my exhaust leaks are and so the turbo isn't making boost for shiznits. After a few runs, wide band and motor are looking good. Not much boost is being produced and turbo is making a very unfamiliar sound, something like a high pitched spool and not the regular turbo howl. One more run and car starts producing a pretty nice sized cloud of smoke. Shut down: culprit blown turbo

However if one were to ignore all the other BS that was happening, the car actually was running fine which was my biggest worry. It idled fine, no misfires on what little boost I did make, coolant temp remained the same. Octane used was 93.xx .

I'm pretty sure these cars are running much higher oil pressures then my DSM ever did, so an oil restrictor I gotta buy now. Also I found a decent deal on a GENUINE Garrett t04e 50trim. Now I gotta bug my exhaust guy to fab up the 4 bolt flanged downpipe.

 

Sorry about the blown turbo, thats tough to hear.

Good luck and keep your head up, a new turbo will be better in the long run.

 

Thanks Gary

I actually need to retract my statement now on the blown turbo. The cheap-o chinese turbo didn't blow, it was the AOS. The separator died a spectacular death sending basically half the oil from the crank case into the intake manifold. Man that was fun cleaning up. I also took Jim's advice and put a restrictor on the new turbo just in case.

I'm not going to purchase another AOS though, with this happening it's time to put on a breather and for go the AOS

 

I blew my AOS prior to any forced induction.
There was a guy in FL a few years ago that had the 1st super charged 2.5 I had seen and blew his engine because a AOS blew on him.
I dont think the forced induction has anything to do with the AOS. Mine and many others have blown with out any mods to the cars.
So in other words I donr feel as if your project has anything to do with the AOS.

 

Oh yeah no doubt it was the device itself. This device has got to be one of those WTF were they thinking sort of things. I broke the thing open and discovered a few things...

1. I'm all for profit but this device is no BS 99% plastic+ 1 metal spring and they find a way to charge us owners $90+

2. The only thing that separates quarts and quarts of oil from getting into our intake manifold is a thin layer of plastic or latex (as thin as a regular condom).

3. Porsche didn't even bother to put some sort of filter or check valve where the diaphragm is. It's just an open spot thats just waiting for oil to get into it

Best
Joe

 

interesting project... i subscribed on 6speed online just for it.... right now im doing something similar on my slk320 but with a supercharger instead of turbo! good luck and excited to see pics / videos!

 

any update?

 

There's a Porsche Motorsport version of this.

Check an article on Caymanclub.net:

http://www.caymanclub.net/reviews/sh...duct=183&cat=4

a 2 chamber Porsche Motor Sport oil separator. (p/n 996 107 926 00) List price: $518

Not easy to install, nor cheap.

 

Its been a month....any updates???


Gary

 

Joe,
Impressive project and genuine Grass Roots Motorsports.
Looking forward to hearing how it turns out.
Cheers.

 

Update?

 

OUCH!!

Listen to JP he is well respected here.

Sorry to hear about your problems brother, I know you've had issues for awhile and thats f***ing crazy. You have done allot of positive PR for that company.

Sounds like engine swap time.

 

Yep engine time and I will be building this one! Think Cams, heads, rings and pistons! I told you I will have the fastest Boxster by then end of the year. I am meeting with the guy who does a lot of Boxster/996 motor R&R and the things he was explaining to me about these motors is amazing. I want a BIG strong build then I will think about reinstalling the SC on strong motor with good rings and pistons. Total cost should stay under 8K. Win win!

 

Who are you talking to? Brad Roberts was doing the same thing to my broken motor but I have not kept in contact with him for a while (funding issues on my side), so I don't know where things stand. We were talking about a 9k+ rpm 4.2L motor capable of 450-500 rwhp.

Bro