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JorgeIII JorgeIII is offline
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Join Date: Jun 2017
Car: BMW F30 LCI 320i 2017
Icon1 Log check, 320i LCI B48 Map 6 - 07-16-2018, 01:24 PM

Please check my log, I appreciate any comments. Thanks, Jorge.

BMW F30 320i,B48 (B48B20A) engine, stock, Shell V-Power (98 octanes RON), jb4, Fuel + EWG wires, firmware 9_t4, map 6. Log made in "Confort" mode (max 4.5 to 8 psi stock, duty bias changed accordingly from stock).

FUA: 5
PID Gain: 6
Fuel open loop: 80
Boost safe: 20 psi.
Boost: Flat 16 psi
Duty Bias:
1500 30
2000 30
2500 30
3000 20
3500 25
4000 15
4500 15
5000 15
5500 65
6000 85
6500 90
7000 95
Attached Files
File Type: csv 1-2018-07-15 13_46_46 (b48 20i 16psi flat)Map_6.csv (16.9 KB, 106 views)
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RMM RMM is offline
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Posts: 102
Join Date: Apr 2017
Car: 120i
Default 07-28-2018, 11:05 PM

Hi your FF profile is similar to my 2016 120i

I am currently running below, but with meth and ** so its not same, but overall profile is similar, and I find that adding mods like meth or ** just shifts curve up or down does not really change shape.

I used a fixed FF, and higher PID gain, it seems to work better on 20i cars, however I do need to adjust it up or down by 10 points once in a while, but the last few months it has been running pretty consistent.


METH_ADD 3.5
METH_PSI 9.9

FOL 60
FF 110
PID 25
DB_OFFSET 10

RPM WG_DB
1500 0
2000 20
2500 30
3000 30
3500 30
4000 30
4500 25
5000 20
5500 50
6000 60
6500 50
7000 50

The reason I think fixed FF and higher PID gain is better is because our the DB / WGDC tuning changes a lot when the DME_BT changes, and on my car the DME_BT seems to have a mind of its own, changes form 8 to 12 PSI, and also changes profile a lot. Get best results when set a fixed FF that is a bit lower then target like yours, but then increase the PID gain to make up for when the DME_BT is low, when DME_BT is low the higher PID gain allows more WGDC and can get closer to target boost.

FYI before I was running METH I was running 17 PSI and it ran well on 98 RON, but if I ran 95 RON it pulling timing, so it was right on the edge.

Your timing and trim look good in that log. If it was me I would even run 17 PSI form lets say 4500-5500 RPM if you have good fuel, that might also reduce the throttle closure that I see in your log, or maybe that was the traction control, did you go over a bump or something or leave TC on? If you do a log always turn TC off, it does weird things.

You may want to run 15 or 14 PSI at 2500 RPM as your hitting max fuel trims.

Also if I were you I would run a higher PID gain like maybe try to go form 6 to 12 to start and see if you get closer to target boost.

FYI here is one of my recent logs attached.
Attached Files
File Type: csv 2018-07-07 22_57_24 (RMM)Map_7.csv (10.2 KB, 64 views)
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Payam @ BMS's Avatar
Payam @ BMS Payam @ BMS is offline
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Car: e90 335i
Default 07-30-2018, 03:46 PM

Log looks really good!
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DarrenLu DarrenLu is offline
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Join Date: Mar 2018
Car: 320I
Default 06-07-2019, 04:32 AM

why your IAT climb up so quick? is that ok?
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