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kyle_rg85 kyle_rg85 is offline
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Unhappy Help! Strange boost behavior, log attached - 11-22-2019, 04:25 PM

Hi guys, need some help figuring out what's up with my boost issues. As you can see from the log, boost initially gets close to target, then drops down and then ramps back up to target. It does the same thing in all maps, even map 4 with stock boost. Have tried turning the BEF off, same thing. I don't think I have any boost leaks, car spools fast and makes great power when the boost finally reaches target. Also, the car feels like the boost is not very smooth sometimes at part throttle, you can feel the power fluctuate. I have also played with wastegate settings on map 10,11,12, no changes no matter what I do. Here's my setup:

-335i auto
-JB4 with MHD hybrid BEF
-Dynamic Autowerx stage 4 turbos (had stage 2 turbos before, boost is doing the same thing)
-New vacuum lines
-Replaced boost solenoids with OEM units
-Have vacuum canisters still installed
-Full bolt on (intercooler, turbo outlet, inlets, charge pipe with Tial BOV etc)
-water meth injection

Any idea what could be causing this? I have friends running the stage 2 turbos with OTS tunes, their logs look just fine.

Thanks for any help!
Attached Images
 
Attached Files
File Type: csv 2019-11-22 335i Map-1.csv (7.5 KB, 59 views)

Last edited by kyle_rg85; 11-22-2019 at 04:59 PM.. Reason: Photo added
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kyle_rg85 kyle_rg85 is offline
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Default 11-23-2019, 12:17 PM

Anyone?
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Dave @ BMS/Fuel-It!'s Avatar
Dave @ BMS/Fuel-It! Dave @ BMS/Fuel-It! is offline
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Default 11-23-2019, 07:16 PM

Set your duty bias settings accordingly to our hybrid default settings- yours are all out of whack


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.
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kyle_rg85 kyle_rg85 is offline
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Default 11-23-2019, 07:19 PM

Quote:
Originally Posted by Dave @ BMS/Fuel-It!
Set your duty bias settings accordingly to our hybrid default settings- yours are all out of whack
ok thanks, will try that! I was just using jb4 map 1, I guess that won't work for these bigger turbos, will need to use map 6 with the hybrid settings, correct?
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kyle_rg85 kyle_rg85 is offline
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Default 11-23-2019, 09:26 PM

ok tried the hybrid settings in map 6, seems ok now! Just trying low boost and its nice and flat now. I set everything at 12psi but it's holding steady at 10psi to redline. Just have to figure out how to get it closer to target. PID gain maybe?
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Haynpunch Haynpunch is offline
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Default 11-24-2019, 06:39 AM

Quote:
Originally Posted by kyle_rg85
ok tried the hybrid settings in map 6, seems ok now! Just trying low boost and its nice and flat now. I set everything at 12psi but it's holding steady at 10psi to redline. Just have to figure out how to get it closer to target. PID gain maybe?
post a new log


07 E90 AT - xHP
JB4 G5 - Trebila BEF
FBO
Hybrids
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Default 11-24-2019, 08:51 AM

Quote:
Originally Posted by kyle_rg85
ok tried the hybrid settings in map 6, seems ok now! Just trying low boost and its nice and flat now. I set everything at 12psi but it's holding steady at 10psi to redline. Just have to figure out how to get it closer to target. PID gain maybe?
The settings will work in map 1, 2 etc

Post a log in map 1 or 2


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.
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kyle_rg85 kyle_rg85 is offline
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Default 11-24-2019, 01:12 PM

Quote:
Originally Posted by Haynpunch
post a new log
ok, so I tried setting boost at 15psi in map 6 but it over boosts in 3rd towards redline and way over boosts in 2nd gear. Here's a 2nd and 3rd gear log. I'm not sure what to change. I tried both lowering and raising duty cycle values but it didn't make much change. I used the recommended settings in the sticky for these logs.

Thanks for your help Dave!
Attached Files
File Type: csv 2019-11-24 2nd gear_Map-6.csv (5.4 KB, 57 views)
File Type: csv 2019-11-24 3rd rec setting_Map-6.csv (8.1 KB, 53 views)
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kyle_rg85 kyle_rg85 is offline
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Default 11-24-2019, 01:13 PM

And sorry should I do a pull in map 1 or 2? I didn't know that the map 6 settings apply in other maps, correct?
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kyle_rg85 kyle_rg85 is offline
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Default 11-24-2019, 02:11 PM

OOPS I forgot to do this "FUD/Options bit6 (disable RPM FF gain) must be turned on". That's probably why boost is all over the place, will try another pull in map 1 to start and see how things look
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Haynpunch Haynpunch is offline
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Default 11-24-2019, 03:50 PM

Just follow "ALL" instructions in that post

JB4 N54 Hybrid Turbo Setup Directions


07 E90 AT - xHP
JB4 G5 - Trebila BEF
FBO
Hybrids
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Default 11-24-2019, 05:46 PM

Quote:
Originally Posted by kyle_rg85
OOPS I forgot to do this "FUD/Options bit6 (disable RPM FF gain) must be turned on". That's probably why boost is all over the place, will try another pull in map 1 to start and see how things look
Follow all hybrid settings, save.

Log map 1


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.
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