Haven’t checked out the leak yet, but I did go out and play around with The Schwaben for a few. You can live stream data and log it too. You can customize what ones you want, like coolant temp (handy) and MAP pressure, as well as pressure after the throttle body and vacuum before. The only issue is that it reads in hectopascals (hPa) and the conversion is too much math to do in my head, especially when I’m driving, lol.
The google tells me that 1 hPa = 0.015 psi.
It can be done but it will take more brain power than I can sacrifice while driving.
Sooooo..... I have been checking out boost gauges, wow! By the time you buy a decent gauge, the adapter for the MAP sensor to add a vacuum port for it, and some way to mount the gauge.... you are beyond what it costs to just buy a scangauge 2. So I’m thinking I’ll probably just go ahead and order one of those up in the next few weeks or so. It seems like a better option, because it offeres multiple gauges and can do some other things as well.
Anybody have any other options they know about? I’m trying to figure this out. The Dash Commander app works pretty well actually. I’ve got it set so I can watch boost, coolant temp, intake/ambient air temp, MAP/MAF, and oil temp.
Really not too shabby for a free app and $10 dongle.
I just would like something a little more permanent that won’t kill my phone battery.

Wow, so I may need to replace that sooner than later, lol. I checked it out, and the pipe was torn under the hose clamp, like halfway around the thing. There was a good 1/8” gap there!
Hopefully my temporary fix will hold for a bit, until I figure out what way I’m going to go. Maybe a CAI? Who knows! Lol.
A bunch of epoxy and some pressure tape for good measure. Seems ok for now.
UPDATE: Well it seems to be pretty solid again now, but did nothing for the noise. I think I may possibly just be getting a little bit of the classic turbo whistle....not really sure because this is the first car I’ve owned with a turbo, and it didn’t make it before the swap, but that doesn’t mean much because I wasn’t making full boost before. And there are some different parts on there now like the DP and IC-pipe....hard to say, gauge doesn’t show any loss of boost pressure and the performance is great. Guess I just whistle now, lol.

It sure is Light Coffee :-) yeah, mine was pulling like crazy! Still is, but after talking with MarioKart I adjusted it back more, down to the factory levels, because I’d be way overboosting when I get my tune if I don’t. Still pulls like mad though. The cool thing is that even at factory PSI level, you and I (you more than me with that 42) will still make more power than stock. Even at the same PSI, a bigger compressor on the turbo will move a larger volume of air. Still pulls great, but a bit less than when I had 17psi.

No way! With the 42 on there? Damn! Hopefully it was just a fluke of some sort? Have you checked the boost controller or whatever it’s called?i think it’s somewhere under the intake manifold maybe? I’ll have to look into it to remember correctly. Wow what a PITA! I’m anxious to hear what you discover. Good luck man, we both went through kind of the same thing with our turbo’s, so I definitely feel for you. Keep me updated please. Good hunting!

On a side note, I got Mario up here about a week and a half ago, so we met up and he did a stage 3 RPM tune on my Duncan. Holy crap! Completely different animal now! I thought it pulled after the turbo upgrade..... now I’m pushing around 22.5 PSI @ 5k and i can’t even put it into words! Just makes me giggle like a schoolgirl, lol. And the increase in boost along with adding a GFB DV+ has almost completely eliminated that funky hooting noise I was trying to locate. Very happy with the combo of the turbo and tune! When I did the turbo upgrade, I had absolutely no intention of getting a tune for a long while if ever. Then was only thinking stage 1. But a few phone calls with Mario and deciding that with the money I saved on labor, I could do the DP and tune and still come out less than just having the turbo replacement done at the shop. So a little self justification and I was on the phone with Mario. By the time we hung up an hour later.... I was getting stage 3 lmao! Made sense though, because of the turbo change and what not. And I thought about it afterwards and everyone I see who gets a stage 1 or 2 almost immediately starts talking about working towards the next stage up... so I’m just ahead of the game, ha ha! Did you get tuned?? Maybe that might help all the upgrades play well together? Just a thought. Keep us posted!
the other reason I’m asking about a tune is also why I turned my boost down to factory levels before the tune. I was looking at it kind of like a tuner box does... more boost = more power.... but more boost on stock map means even leaner AFR’s and pulled timing, or knock (yikes) so I didn’t wa t to increase the boost without adjusting other parameters with a remap to try to keep the motor happy and not grenade it! Lol

Jeez, what a PITA! I’m not sure at this point. That turbo is still a K03 isn’t it? Or is it a K04? How quick and at what rpm does it spool up? The only thing tha is coming to mind right at the moment, is that maybe the bigger turbo just doesn’t spool quite as quickly as the smaller factory one, and it’s expecting some boost under load that is just not there yet. Just an idea. Does it only do it under load, like trying to accelerate on the highway or go up a hill......again? Does downshifting before acclelerating keep it from happening? And finally...... I’m sure you would know already, but is there a chance that the turbo is faulty? You are making plenty of boost so I doubt it, but I’m just throwing crap out there to see what sticks, so to speak. Hmmmm.... maybe it’s something simple like just a little wastegate adjustment? We can hope. Good luck buddy, let me know what happens or if anything sounds plausible.

Edit: After thinking about it for a few, I’m thinking that spooling up probably isn’t the issue. I believe Mario had this same turbo on his R60 until just the other day, and I know a few others who have it and aren’t having the issue. That said, I believe they are all running a tune with it though. So maybe? I’m installing one for someone else this coming weekend, I’ll maybe have a better feel for it then, since mine is only 40mm. But that Countryman is tuned too. Sheesh.... that’s a real head scratcher ..... I’ll keep the hamster wheel in my skull going and see if I can think of anything else.

Wow.... I don’t know, but honestly, it sounds a lot like the wastegate symptoms that had us both replacing our turbos to begin with. How frustrating for you. My guess is that you are making boost, so probably not the problem but worth checking to eliminate it from the discussion. Can you check it with a vacuum pump? Are you losing any boost? Or does it hold strong? Maybe the issue is as simple as changing parameters with a tune, I don’t know. I guess I would double check the turbo and wastegate for proper function and adjustment on the wg. Then maybe the boost control solenoid?

Just wondering if you ever solved your low boost code issue? I’m hoping so. I installed Mariokart’s old 42mm turbo on a R60 a while back, and although it does spool a little later, it’s really not much. I liked it though! Got me thinking about going bigger, lol. A friend of mine just bought a CMS and they got that dang code last night. We’ll see how that one turns out, lol.
Hope all is now good to go.

Sorry buddy, I don’t think I’m much help, the new turbo fixed it for me.
From the sounds of it, you just about replaced everything but the turbo. That’s probably where your problem has been all along. But it’s a tough one to figure out sometimes. Mine was finally diagnosed when I gave up and took it to a mechanic who then drove it hooked up to their computer and logged everything. Maybe you could use torque or dash command or some other way to monitor boost and drive it while watching what it does. Under load the ECU will call for a certain amount of boost to match, if it doesn’t see as much as it called for, it throws the code and limp mode. If you can see what it’s doing you may be able to tell what’s going on.
untuned going down the freeway, going up an incline when you tip your foot in just a bit to maintain speed, I was seeing it hit 10psi boost targets with hardly any throttle increase. If you are not seeing a decent amount of pressure under a load condition like that, you need a new turbo. The wastegate can be adjusted correctly and look like it’s sealing, even if it isn’t. Mine looked good visually and with a vacuum pump actuating it was good too. But it was toast just the same.
Try watching you boost levels for a bit, it may help you figure this out. Normal boost pressure on these is right about 11psi max with brief overboost up to about 15psi.
Good luck, I know that it’s frustrating! Hang in there. It took about 6 months to figure mine out, and that includes paying a couple of different mechanics too! Let us know how it goes and what kind of numbers you get

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