N54Tech.com - International Turbo Racing Discussion
(#1)
Old
miksebik miksebik is offline
Junior Member
 
Posts: 322
Join Date: Jan 2013
Car: E92 335i
Default Boost reaching target fast but under target between 3000 and 4000rpm - 03-15-2019, 01:19 AM

Hi,
I had my car in a service. The front turbo was adjusted as the flap did not close properly. Now it seems OK, the boost builds very fast. But then I found that at map2, I stay under (1-2PSI) under target, between 3000 and 4000rpm.
I guess duty bias tunning will solve this?

flash: PUMP flash
map: 2

btw I know the log is not clean as I had problems with traction etc.. This is about the slight underboost in 3000-4000rpm range.

Thanks,
Mike
Attached Files
File Type: csv 2019-03-14 21_15_18_Map-2.csv (25.6 KB, 57 views)
File Type: csv 2019-03-14 21_15_46_Map-2.csv (18.8 KB, 59 views)


E92 335i N54, Hexon RR500, JB4, DCI, MMP inlets, ER chargepipe, Turbosmart Kompact Dual Port BOV, ATM IC, Wagner downp*pes, MPerformance exhaust, oil cooler, trebila flash (via MHD Flasher), E60, M Performance 370mm brakes, styling 313 wheels, M Performance suspension, Fuelit Stage2, MFactory LSD, MFactory SMWF
Reply With Quote
(#2)
Old
miksebik miksebik is offline
Junior Member
 
Posts: 322
Join Date: Jan 2013
Car: E92 335i
Default 03-15-2019, 01:41 AM

I noticed that ecu_psi differs from boost by 2PSI.. while the boost is 17, the ecu_psi is still around 15. That might be the clue?


E92 335i N54, Hexon RR500, JB4, DCI, MMP inlets, ER chargepipe, Turbosmart Kompact Dual Port BOV, ATM IC, Wagner downp*pes, MPerformance exhaust, oil cooler, trebila flash (via MHD Flasher), E60, M Performance 370mm brakes, styling 313 wheels, M Performance suspension, Fuelit Stage2, MFactory LSD, MFactory SMWF
Reply With Quote
(#3)
Old
Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
Super Moderator
 
Posts: 7,662
Join Date: Apr 2014
Car: E92 335XI
Default 03-15-2019, 10:52 PM

Quote:
Originally Posted by miksebik
I noticed that ecu_psi differs from boost by 2PSI.. while the boost is 17, the ecu_psi is still around 15. That might be the clue?
Raise your DB by 5 from 3k To 4K

Take 2-3 adaptation pulls & relog


Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
Reply With Quote
(#4)
Old
miksebik miksebik is offline
Junior Member
 
Posts: 322
Join Date: Jan 2013
Car: E92 335i
Default 03-16-2019, 03:30 AM

Dave, I set FUD to 64 and decided to adjust duty bias in all rpms. Does it make sense? I think I am OK in the range up to 5000. Now I am under target above 5000rpm, I have to increase the duty bias there too.
Is it normal that I had to set DB=80 in certain rpms?
Attached Files
File Type: csv 2019-03-15 19_01_08_Map-2.csv (19.9 KB, 53 views)


E92 335i N54, Hexon RR500, JB4, DCI, MMP inlets, ER chargepipe, Turbosmart Kompact Dual Port BOV, ATM IC, Wagner downp*pes, MPerformance exhaust, oil cooler, trebila flash (via MHD Flasher), E60, M Performance 370mm brakes, styling 313 wheels, M Performance suspension, Fuelit Stage2, MFactory LSD, MFactory SMWF
Reply With Quote
(#5)
Old
Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
Super Moderator
 
Posts: 7,662
Join Date: Apr 2014
Car: E92 335XI
Default 03-17-2019, 07:57 AM

Quote:
Originally Posted by miksebik
Dave, I set FUD to 64 and decided to adjust duty bias in all rpms. Does it make sense? I think I am OK in the range up to 5000. Now I am under target above 5000rpm, I have to increase the duty bias there too.
Is it normal that I had to set DB=80 in certain rpms?
Where did you come up with those duty bias #s? Hah

You can manipulate the car however you wish. Generally I like to keep my duty bias adjustments small & close to one another to avoid a jagged boost curve.

Remember stock turbos arenít going to hold a ton of boost at redline and if they do you are working them hard & out of efficiency.


Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
Reply With Quote
(#6)
Old
miksebik miksebik is offline
Junior Member
 
Posts: 322
Join Date: Jan 2013
Car: E92 335i
Default 03-17-2019, 02:27 PM

Well, I am raising the duty bias on my own in order to reach the target. OK, I will try to put them closer together but honestly, the car does not feel weird. Shrug.
With numbers around 70-80 the boost will likely reach the target. My turbos are not OEM, it is Hexon RR500 with slightly bigger wheels than OEM. It is weird that earlier, there was no need to tune the duty bias..


E92 335i N54, Hexon RR500, JB4, DCI, MMP inlets, ER chargepipe, Turbosmart Kompact Dual Port BOV, ATM IC, Wagner downp*pes, MPerformance exhaust, oil cooler, trebila flash (via MHD Flasher), E60, M Performance 370mm brakes, styling 313 wheels, M Performance suspension, Fuelit Stage2, MFactory LSD, MFactory SMWF
Reply With Quote
(#7)
Old
Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
Super Moderator
 
Posts: 7,662
Join Date: Apr 2014
Car: E92 335XI
Default 03-17-2019, 10:52 PM

Quote:
Originally Posted by miksebik
Well, I am raising the duty bias on my own in order to reach the target. OK, I will try to put them closer together but honestly, the car does not feel weird. Shrug.
With numbers around 70-80 the boost will likely reach the target. My turbos are not OEM, it is Hexon RR500 with slightly bigger wheels than OEM. It is weird that earlier, there was no need to tune the duty bias...
As stated prior- you can alter your DB settings however you wish, your car, you can tune it, raise the boost, lower the boost, go into the flash and alter tables- whatever you desire- we WONT stop you. What we will do however is give insight & suggestions based on seeing countless different setup over the years.

It seems like you got it under control, so I will bow out, best of luck & be safe


Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
Reply With Quote
(#8)
Old
miksebik miksebik is offline
Junior Member
 
Posts: 322
Join Date: Jan 2013
Car: E92 335i
Default 12-08-2019, 01:57 AM

Hi, to sum it up.. You know what was the cause of this weird problem?
Cracked ER aluminium chargepipe! With low boost, it behave well, but with the pressure building, the crack got wider and let pressure off.


E92 335i N54, Hexon RR500, JB4, DCI, MMP inlets, ER chargepipe, Turbosmart Kompact Dual Port BOV, ATM IC, Wagner downp*pes, MPerformance exhaust, oil cooler, trebila flash (via MHD Flasher), E60, M Performance 370mm brakes, styling 313 wheels, M Performance suspension, Fuelit Stage2, MFactory LSD, MFactory SMWF
Reply With Quote
(#9)
Old
Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
Super Moderator
 
Posts: 7,662
Join Date: Apr 2014
Car: E92 335XI
Default 12-08-2019, 05:21 AM

Quote:
Originally Posted by miksebik
Hi, to sum it up.. You know what was the cause of this weird problem?
Cracked ER aluminium chargepipe! With low boost, it behave well, but with the pressure building, the crack got wider and let pressure off.
Where was it cracked? Donít hear that too often, glad u found the issue!


Burger Motorsports
Home of the JB4 the worlds most popular turbocharged tuning system!

It is the sole responsibility of the purchaser and installer of any BMS part to employ the correct installation techniques required to ensure the proper operation of BMS parts, and BMS disclaims any and all liability for any part failure due to improper installation or use. It is the sole responsibility of the customer to verify that the use of their vehicle and items purchased comply with federal, state and local regulations. BMS claims no legal federal, state or local certification concerning pollution controlled motor vehicles or mandated emissions requirements. BMS products labeled for use only in competition racing vehicles may only be used on competition racing vehicles operated exclusively on a closed course in conjunction with a sanctioned racing event, in accordance with all federal and state laws, and may never be operated on public roads/highways. Please click here for more information on legal requirements related to use of BMS parts.
Reply With Quote
(#10)
Old
miksebik miksebik is offline
Junior Member
 
Posts: 322
Join Date: Jan 2013
Car: E92 335i
Default 12-08-2019, 06:26 AM

It was right at the bayonet, or how you call it in English...

I bought this branded chargepipe, the most expensive on market at its time.. to prevent such problems but here you go. Nothing is perfect.
Attached Images
 


E92 335i N54, Hexon RR500, JB4, DCI, MMP inlets, ER chargepipe, Turbosmart Kompact Dual Port BOV, ATM IC, Wagner downp*pes, MPerformance exhaust, oil cooler, trebila flash (via MHD Flasher), E60, M Performance 370mm brakes, styling 313 wheels, M Performance suspension, Fuelit Stage2, MFactory LSD, MFactory SMWF
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump




vBulletin Skin developed by: vBStyles.com
Copyright © 2007 - 2020, N54tech.com