03-27-2020, 03:54 AM | #1 | |
Captain
553
Rep 815
Posts |
Pure stage 2+ boost oscillations (Help!!!)
Current setup:
Built engine + FBO Pure turbos stage 2+ BMS charge pipes EOS Billet top mount cooler Dual WMI nozzles on cooler (cold side) RK tunes J pipe CSF front mount cooler f80paul custom tune BM3 f80paul has advised I’ve got a small boost leak somewhere in my system. I’m still able to achieve target boost levels of 30psi but my WGDC logs using BM3 are always more than 90%, closer to 100% Quote:
1. Re-install OEM top mount cooler 2. Re-route WMI nozzles to BMS charge pipes Workshop has tried to do leak tests already but can’t find any leaks in my system Does anyone else have any input on what could be the cause of my ultra high WGDC? The pure stage 2+ turbos shouldn’t be anywhere near capacity boosting 25-28psi which is what I run daily. Here are some of my logs: https://www.bootmod3.net/log?id=5e7a...0b43508e6fe1f1 https://www.bootmod3.net/log?id=5e7a...0b43508e6fe1f2 https://www.bootmod3.net/log?id=5e7a...0b43508e6fe1f3 As a very last resort, could my wastegates be faulty? It’s not Super expensive to replace both wastegates if it’s possible they could be faulty and causing high WGDC. Last edited by E92inSG; 04-04-2020 at 10:08 PM.. |
|
03-27-2020, 07:49 AM | #2 |
Major
2050
Rep 1,200
Posts |
Something on Bank 1 imo...check the charge pipe again.
An exhaust leak could be possible too at the turbo manifold-head flanges.
__________________
575RWHP F87 M2C - ECUTEK RACEROM with flex fuel tuning by Bend Calibration 1000+RWHP E46 M3, Lab22 Built Turbo S54, Bend Calibration Tuned - BMW Half Mile Record Holder |
Appreciate
0
|
03-27-2020, 09:31 AM | #3 |
Second Lieutenant
172
Rep 267
Posts |
Check all clamps on the charge pipe couplers and make sure the pipes are fully inserted into the couplers. Check the j-pipe as well as those are the only places you could be leaking compressed air from.
__________________
726whp/668wtq corn fed meth addict
|
Appreciate
0
|
03-27-2020, 09:42 AM | #4 |
driver
816
Rep 777
Posts |
I think I heard a guy say once that he had a boost leak because he never put the rubber o rings from his stock charge pipes to his after market ones. The aftermarket never came with the o-rings.
|
Appreciate
0
|
03-27-2020, 09:59 AM | #5 |
Private First Class
339
Rep 179
Posts |
x2. This is why i run silicone charge pipes and silicone wherever i can so plastic/metal/aluminum isn't causing issues. The boost leak could be coming from a small pinhole that you will not spot with a naked eye. It has happened to me with a brand that charges twice the price for their chargepipes. It took over 5 different ways of doing a leak down test over 2hours to find my pinhole leak.
__________________
2016 BMW M4 1005WHP/863WTQ - First M4 in the world over 1000WHP - 2020 Toyota ZUUUPRA Instagram: ZUUUPRA_M4N |
Appreciate
2
Commanderwiggin2050.00 Envy ///M327.00 |
03-27-2020, 10:01 AM | #6 |
BimmerPost Supporting Vendor
24191
Rep 190,805
Posts |
Good luck OP and let us know once you figure it out
__________________
Check out our current sale by clicking on this link!
https://x-ph.com/sale/ Phone number 702-494-9435 |
Appreciate
0
|
03-27-2020, 10:03 AM | #7 |
Captain
553
Rep 815
Posts |
Appreciate the responses. Pls keep them coming.
Checking charge pipes etc all will do so definitely. These are the easy ones. Right now my biggest worry is faulty electronic waste gates that aren’t throwing codes yet. |
Appreciate
0
|
03-27-2020, 10:04 AM | #8 | |
Captain
553
Rep 815
Posts |
Quote:
It will be a slow process changing one part at a time and re-logging each time. But In the meantime the car seems to be running perfectly and pulling hard. Only the logs are revealing these small issues Last edited by E92inSG; 03-27-2020 at 10:28 AM.. |
|
Appreciate
1
rnguyennnn338.50 |
03-27-2020, 10:26 AM | #9 |
Captain
553
Rep 815
Posts |
|
Appreciate
1
Commanderwiggin2050.00 |
03-27-2020, 11:58 AM | #11 |
Colonel
1973
Rep 2,711
Posts |
Had a similar issue, albeit with PS2 high flow turbos. Paul mentioned he noticed a slight sign of boost leak based on the logs, but nothing came up from a smoke test.
Continued to drive the car like normal, and went to the drag strip in an attempt to gather some data. Blew the engine due to a lean condition (fried piston on Cyl 4), so I never got around to diagnosing the source of the leak. PS2 units were leaking a good amount of oil upon tear down, so it may have been a contributing factor. The aluminum J-pipe was a bit loose on the TB side, so I recommend adding this to your checklist. |
Appreciate
0
|
03-27-2020, 12:22 PM | #14 |
Captain
553
Rep 815
Posts |
That’s what I thought as well! I don’t want to be so quick to blame the turbos. I’ll update with findings in this thread as I go along.
Again, the car is driving well and delivering good power at the current moment, and on a relatively “safe” tune from f80paul |
Appreciate
3
|
03-27-2020, 01:27 PM | #15 | |
Lieutenant Colonel
1582
Rep 1,976
Posts |
Quote:
|
|
Appreciate
0
|
03-27-2020, 01:37 PM | #16 | |
Colonel
3237
Rep 2,160
Posts |
Quote:
|
|
Appreciate
0
|
03-27-2020, 04:27 PM | #17 | |
Colonel
1973
Rep 2,711
Posts |
Quote:
No brand or product is 100% resistant to failure. There's an MTBF to just about every mechanical part ever made. |
|
Appreciate
0
|
03-27-2020, 04:39 PM | #18 | |
Colonel
1973
Rep 2,711
Posts |
Quote:
Unfortunately, there's no log data that would help explain the engine failure. The tune was relatively safe like OP's situation. I should add I was running a 50/50 split (99% meth) feed on the J-pipe (cold side) that happened to have a loose fitment, and another one on the hot side charge pipe. Cylinder 4 is closes to the TB, so something clearly went wrong with the setup. |
|
Appreciate
0
|
03-28-2020, 10:17 AM | #19 |
Captain
553
Rep 815
Posts |
https://www.bootmod3.net/log?id=5e7f...0b430c46472b95
https://www.bootmod3.net/log?id=5e7f...0b430c46472bc4 I got another couple of fresh logs on BM3 running my 28psi map. 2nd log was a 100-200kmh run of 6.1s, which is decent for 93+meth @ 28psi, but clearly my WGDC is still super high and suffering boost oscillations. Troubleshooting starts on Monday when workshop opens. |
Appreciate
0
|
03-28-2020, 07:55 PM | #20 | |
Major
2050
Rep 1,200
Posts |
Quote:
Bank 2 is pulling more fueling out when compared to Bank 1 which could either be more meth going to Bank 2 or less air/less exhaust scavenging (overall less flow) in Bank 2.
__________________
575RWHP F87 M2C - ECUTEK RACEROM with flex fuel tuning by Bend Calibration 1000+RWHP E46 M3, Lab22 Built Turbo S54, Bend Calibration Tuned - BMW Half Mile Record Holder Last edited by Commanderwiggin; 03-28-2020 at 08:03 PM.. |
|
Appreciate
0
|
03-28-2020, 08:38 PM | #21 | |
Captain
553
Rep 815
Posts |
Quote:
so 1st step tomorrow will be to move WMI nozzles to charge pipe pre-IC and revert back to stock TMIC, so try and isolate boost leak, |
|
Appreciate
0
|
03-28-2020, 11:04 PM | #22 | |
Major
2050
Rep 1,200
Posts |
Quote:
Has your shop done a pressurized smoke test with a smoke testing machine? This should identify any leaks quickly.
__________________
575RWHP F87 M2C - ECUTEK RACEROM with flex fuel tuning by Bend Calibration 1000+RWHP E46 M3, Lab22 Built Turbo S54, Bend Calibration Tuned - BMW Half Mile Record Holder |
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|