N55 PWG Overboost after shifting. Help me!

rnclira · 05-03-2020, 06:31 PM

Hi guys! my car is FBO with upgraded turbo (similar to PS2) with GFB DV+ on. we spent lot of time trying to fix this via software tune, but I just figured out that it could be a hardware problem.

has anyone faced it? we can reach boost target 22/23psi on 5thgear but when shift to 6th overboosts to 29/30psi. I m getting crazy with that.

sometimes comes DME error: Blow off jammed closed.

please help me!!!

Eschmacher · 05-03-2020, 06:50 PM

It's due to the way GFB has designed the DV+. The extra spring holds the piston mostly closed after letting off. You can remove the extra spring or get a turbosmart DV.

rnclira · 05-03-2020, 07:16 PM

Quote:

Originally Posted by Eschmacher

It's due to the way GFB has designed the DV+. The extra spring holds the piston mostly closed after letting off. You can remove the extra spring or get a turbosmart DV.

So, you think using stock spring with GFB valve would work? or best think to do is changing it for a turbo smart blow off valve?

DreamerJoe · 05-03-2020, 07:47 PM

the GFB DV+ installed with the main spring bleeds pressure slowly instead of all at once. can be a good thing especially with a manual car, I chose not to install it because their was a notice claiming it could cause a CEL. installed without the main spring it will perform exactly like the oem DV except it's a lot stronger. I don't see how installing it with the spring though can lead to overboosting, what turbo do you have installed?

rnclira · 05-03-2020, 08:31 PM

Quote:

Originally Posted by DreamerJoe

the GFB DV+ installed with the main spring bleeds pressure slowly instead of all at once. can be a good thing especially with a manual car, I chose not to install it because their was a notice claiming it could cause a CEL. installed without the main spring it will perform exactly like the oem DV except it's a lot stronger. I don't see how installing it with the spring though can lead to overboosting, what turbo do you have installed?

its just like an PS2. hybrid turbo with same specs. so, I will remove the GFB spring and use the stock one to try.

Eschmacher · 05-03-2020, 09:25 PM

The spring I'm referring to is the one on the left.

I can easily see how this could cause overboost. Throttle shuts between gears, DV barely opens, causing boost to spike rather than being vented quick enough.

harkes · 05-04-2020, 04:32 AM

All PWG cars does this. The throttle closes to compensate so nothing to worry about. I am also running the DV+. Please update us if removing the spring is working.

My car...

rnclira · 05-06-2020, 12:43 PM

Quote:

Originally Posted by harkes

All PWG cars does this. The throttle closes to compensate so nothing to worry about. I am also running the DV+. Please update us if removing the spring is working.

My car...

i have just removed the spring, and surprise: didnt make any difference hahah. I will now try stock valve setup. What gets me worried is, when overboosting to 30psi, it always comes timming correction ariund 8/9 degrees. lets see the stock one.

rnclira · 05-06-2020, 12:45 PM

Quote:

Originally Posted by Eschmacher

The spring I'm referring to is the one on the left.

I can easily see how this could cause overboost. Throttle shuts between gears, DV barely opens, causing boost to spike rather than being vented quick enough.

nothing happend

harkes · 05-06-2020, 09:58 PM

Quote:

Originally Posted by rnclira

nothing happend

Haha I was sceptical but chose not to say anything... Can you share log link with/without the spring?

harkes · 05-06-2020, 10:01 PM

Please share some logs in datazap! I am going through hell getting my PWG PS2 tuned. Working with tuner #3 now to get it done.

T_H_O_M_A_S · 05-07-2020, 08:14 AM

https://datazap.me/u/thomas/pureboos...og=1&data=3-19

dont think , you will get rid of it all together . the ewg controller is way faster
what would like to see is a datazap of lets say a audi rs3 2.5tfsi , they still have pneumatic wastegate control . maybe its inherent to the bmw design

rnclira · 05-07-2020, 12:56 PM

Quote:

Originally Posted by harkes

Please share some logs in datazap! I am going through hell getting my PWG PS2 tuned. Working with tuner #3 now to get it done.

will do it when I get home. I was trying now with stock Diverter valve... the results, made me think: should I trow my DV+ on trash can or burn it? hahah car feels much better and stable with stock valve. less overboosting. we will work now on tune and finalize it.

thejeremyman9 · 05-07-2020, 01:34 PM

Quote:

Originally Posted by rnclira

will do it when I get home. I was trying now with stock Diverter valve... the results, made me think: should I trow my DV+ on trash can or burn it? hahah car feels much better and stable with stock valve. less overboosting. we will work now on tune and finalize it.

Very interesting... I wonder if this is mostly true with PWG due to different wastegate control/response?

harkes · 05-07-2020, 11:01 PM

Quote:

Originally Posted by thejeremyman9

Very interesting... I wonder if this is mostly true with PWG due to different wastegate control/response?

100% PWG just SUCK with a bigger turbo on F-series.

My experience on the MHD platform (dont get me started with JB4 and BM3

):
Tuner #1 - Gave up working with him after rev 47
Tuner #2 - At rev 30 now. Starting to look decent but not finished
Tuner #3 - At rev 10 as test revisions to see if can do it. Will start shortly on a proper map.

Never had a mechanical issue influencing the tuning process.

harkes · 09-16-2020, 09:09 PM

Quote:

Originally Posted by rnclira

will do it when I get home. I was trying now with stock Diverter valve... the results, made me think: should I trow my DV+ on trash can or burn it? hahah car feels much better and stable with stock valve. less overboosting. we will work now on tune and finalize it.

Hi

My tune is "finished", however I have had to accept some over/under boost post shift. Hos did it go with your stock DV? Did you compare logs and is it something you want to share?

aps · 09-27-2020, 08:49 AM

anyone here tried the turbosmart BOV options?

thejeremyman9 · 09-28-2020, 11:20 AM

Quote:

Originally Posted by aps

anyone here tried the turbosmart BOV options?

Several posts about both the recirc and VTA/dual port options scattered around other threads over the past few weeks.

aps · 09-28-2020, 12:30 PM

Quote:

Originally Posted by thejeremyman9

Several posts about both the recirc and VTA/dual port options scattered around other threads over the past few weeks.

right, sorry i meant more specifically to those with PWG and PS2 experiencing overboost. does switching to the one of the turbosmart DV options correct this issue? sounds like those with DV+ are the ones with problems

socalengineer · 06-20-2023, 09:54 PM

Did you guys ever get your car running properly with PS2?

I'm working with a tuner and he has never been able to get rid of drivetrain malfunctions. As I look at the logs he is always overboosting by a few PSI

thejeremyman9 · 06-21-2023, 02:09 PM

Quote:

Originally Posted by socalengineer

Did you guys ever get your car running properly with PS2?

I'm working with a tuner and he has never been able to get rid of drivetrain malfunctions. As I look at the logs he is always overboosting by a few PSI

PWG? what tuner? Drivetrain malfunctions for what?

harkes · 06-24-2023, 06:14 AM

Quote:

Originally Posted by socalengineer

Did you guys ever get your car running properly with PS2?

I'm working with a tuner and he has never been able to get rid of drivetrain malfunctions. As I look at the logs he is always overboosting by a few PSI

Mine is running decent I'd say. Some post-shift overboost and a little underboost in 3rd but otherwise alright.

THREE MILLION (almost) logs in here if you want to poke around

https://datazap.me/u/harkes

05-03-2020, 06:31 PM	#1
rnclira New Member 3 Rep 28 Posts Drives: 2013 BMW M135i N55 PWG Join Date: Jan 2020 Location: Recife-PE \| Brasil iTrader: (0)	N55 PWG Overboost after shifting. Help me! Hi guys! my car is FBO with upgraded turbo (similar to PS2) with GFB DV+ on. we spent lot of time trying to fix this via software tune, but I just figured out that it could be a hardware problem. has anyone faced it? we can reach boost target 22/23psi on 5thgear but when shift to 6th overboosts to 29/30psi. I m getting crazy with that. sometimes comes DME error: Blow off jammed closed. please help me!!!
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05-03-2020, 07:47 PM	#4
DreamerJoe Captain 241 Rep 758 Posts Drives: 2017 340i M.G. w red interior Join Date: Dec 2018 Location: SoCal iTrader: (0)	the GFB DV+ installed with the main spring bleeds pressure slowly instead of all at once. can be a good thing especially with a manual car, I chose not to install it because their was a notice claiming it could cause a CEL. installed without the main spring it will perform exactly like the oem DV except it's a lot stronger. I don't see how installing it with the spring though can lead to overboosting, what turbo do you have installed? __________________ MG F30 M-Sport 6mt FBO w/ MHD stage 2 plus (PWG), ST XA Coilovers, 19" VMR V804.
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05-03-2020, 09:25 PM	#6
Eschmacher Car Hypochondriac 335 Rep 901 Posts Drives: 2014 335i M-Sport Estoril Blue Join Date: Feb 2017 Location: Sterling, VA iTrader: (0) Garage List 2014 BMW 335i [0.00]	The spring I'm referring to is the one on the left. I can easily see how this could cause overboost. Throttle shuts between gears, DV barely opens, causing boost to spike rather than being vented quick enough. __________________ Power mods: VRSF IC/Catted DP - FTP CP/BP - AFE Cat-back - BM3/XHP - Dorch S2 Handling mods: Koni yellow - Eibach prokit - Millway street - M Performance LSD - M3 brakes - EBC bluestuff Exterior: Euro LCI tail lights - Shitty ECS CF spoiler - Chinese M performance diffuser Interior: Bavsound stage 1 and subs - custom trunk sub by Mike1327
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05-04-2020, 04:32 AM	#7
harkes Colonel 1076 Rep 2,354 Posts Drives: M135i, E39 M5, NSX and AE86 Join Date: Apr 2014 Location: Xiamen, China iTrader: (0)	All PWG cars does this. The throttle closes to compensate so nothing to worry about. I am also running the DV+. Please update us if removing the spring is working. My car... Attached Images __________________ M135i 8AT PWG, MHD, Pure Stage2, WMI via Torqbyte CM5-LT, Custom tuned by PureBoost (A Dane in China)
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05-06-2020, 10:01 PM	#11
harkes Colonel 1076 Rep 2,354 Posts Drives: M135i, E39 M5, NSX and AE86 Join Date: Apr 2014 Location: Xiamen, China iTrader: (0)	Please share some logs in datazap! I am going through hell getting my PWG PS2 tuned. Working with tuner #3 now to get it done. __________________ M135i 8AT PWG, MHD, Pure Stage2, WMI via Torqbyte CM5-LT, Custom tuned by PureBoost (A Dane in China)
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05-03-2020, 06:50 PM	#2
Eschmacher Car Hypochondriac 335 Rep 901 Posts Drives: 2014 335i M-Sport Estoril Blue Join Date: Feb 2017 Location: Sterling, VA iTrader: (0) Garage List 2014 BMW 335i [0.00]	It's due to the way GFB has designed the DV+. The extra spring holds the piston mostly closed after letting off. You can remove the extra spring or get a turbosmart DV.
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05-07-2020, 08:14 AM	#12
T_H_O_M_A_S Second Lieutenant 188 Rep 282 Posts Drives: M140i Join Date: Mar 2019 Location: Belgium iTrader: (0)	https://datazap.me/u/thomas/pureboos...og=1&data=3-19 dont think , you will get rid of it all together . the ewg controller is way faster what would like to see is a datazap of lets say a audi rs3 2.5tfsi , they still have pneumatic wastegate control . maybe its inherent to the bmw design __________________ M140i DP , OPF delete , MHD stg2 93oct , xhp stg3
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09-27-2020, 08:49 AM	#17
aps Captain 336 Rep 963 Posts Drives: 2018 M3 ZCP Join Date: Apr 2016 Location: NC iTrader: (6)	anyone here tried the turbosmart BOV options? __________________ 2018 Azurite Black F80 M3 ZCP 2019 Phytonic Blue G05 X5 2013 Glacier Silver F30 335i (sold)
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06-20-2023, 09:54 PM	#20
socalengineer Private First Class 13 Rep 119 Posts Drives: 640i F13 Alpine White Join Date: Dec 2018 Location: SoCal iTrader: (0)	Did you guys ever get your car running properly with PS2? I'm working with a tuner and he has never been able to get rid of drivetrain malfunctions. As I look at the logs he is always overboosting by a few PSI
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