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GokhanO GokhanO is offline
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Default b48 125i jb4 issues - 01-19-2022, 08:59 AM

Hello guys

I have a f20 125i with b48b20b engine. I installed jb4 and i have some problems;

I used to own turbocharged hondas and we used to kept our afr under boost like 11.5 12. But in this car in the wot runs i always see values close to 14.7 till redline. I know this engine is a direct injected engine and designed to run a little lean but i am not feeling comfortable what do you think ?

My second problem, in the map2 when making wot runs, when i pushed the accelerator, it feels like there is a bump in the acceleration, it is not smooth.

I took some datalogs ( map 0 map1 and map2 ), would you please have a look to them ?
Attached Files
File Type: csv log1.csv (72.6 KB, 67 views)
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Steve @ BMS/Fuel-It! Steve @ BMS/Fuel-It! is offline
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Default 01-19-2022, 12:51 PM

Put all your user adjustment settings back to the default values and do another set of logs. Those settings are incorrect...here's the link for the default settings.

JB4 B48/B58 Firmware, Settings, and Notes - N54Tech.com - International Turbo Racing Discussion



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GokhanO GokhanO is offline
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Thumbs up 01-19-2022, 01:23 PM

Quote:
Originally Posted by Steve @ BMS/Fuel-It!
Put all your user adjustment settings back to the default values and do another set of logs. Those settings are incorrect...here's the link for the default settings.

JB4 B48/B58 Firmware, Settings, and Notes - N54Tech.com - International Turbo Racing Discussion
Thank you very much, i will correct them and do another set of logs
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GokhanO GokhanO is offline
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Default 01-20-2022, 09:03 AM

Quote:
Originally Posted by Steve @ BMS/Fuel-It!
Put all your user adjustment settings back to the default values and do another set of logs. Those settings are incorrect...here's the link for the default settings.

JB4 B48/B58 Firmware, Settings, and Notes - N54Tech.com - International Turbo Racing Discussion
Today i changed the settings and made couple of logs in map1. But it seems afr values are again locked at 14.6 14.7 and also when i first press the accelerator i am feeling a sudden bump for a short while.

Please have a look at my logs, thanks.
Attached Files
File Type: csv P58_M1_R1_220120_154940.csv (11.9 KB, 46 views)
File Type: csv P58_M1_R1_220120_154808.csv (8.7 KB, 43 views)
File Type: csv P58_M1_R1_220120_154718.csv (10.9 KB, 43 views)
File Type: csv P58_M1_R1_220120_154625.csv (10.3 KB, 41 views)
File Type: csv P58_M1_R1_220120_134816.csv (32.5 KB, 41 views)
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Cannon @ BMS Cannon @ BMS is offline
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Default 01-20-2022, 11:43 AM

Is your traction control all the way off? I'm not seeing any real issues here.


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Default 01-20-2022, 11:46 AM

Yes it is completely off, so you are saying those afr values are not on the lean side ?
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Default 01-20-2022, 11:50 AM

The DME determines the AFR's and yes, they do run lean from the factory. But you're not running very much boost and you don't have any timing corrections....looks normal.



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Default 01-20-2022, 11:55 AM

Ok I understand so I think I can try map2 and map3, I am using 98 octane(ron) here.
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Default 01-20-2022, 12:11 PM

Upload a log on map 2 and then we'll go from there.



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Default 01-20-2022, 12:21 PM

Ok I will
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GokhanO GokhanO is offline
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Default 01-29-2022, 02:01 PM

Quote:
Originally Posted by Steve @ BMS/Fuel-It!
Upload a log on map 2 and then we'll go from there.
here are some logs for map2 and map3
Attached Files
File Type: csv P58_M2_R1_220129_185505.csv (20.2 KB, 42 views)
File Type: csv P58_M2_R1_220129_185959.csv (25.1 KB, 45 views)
File Type: csv P58_M2_R1_220129_195022.csv (11.1 KB, 37 views)
File Type: csv P58_M3_R1_220129_190106.csv (13.2 KB, 39 views)
File Type: csv P58_M3_R1_220129_190341.csv (19.8 KB, 45 views)
File Type: csv P58_M3_R1_220129_190452.csv (11.7 KB, 40 views)
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Default 01-31-2022, 06:21 PM

Map 3 looks pretty good. Trims are pretty high so don't add any ethanol.



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