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2023 M340i log review please

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  • 2023 M340i log review please

    I just recently installed the JB4 and would like to make sure that everything's looking good... I'm running 93 octane.
    Log includes some slow steady state driving and a harder pull.
    Attached Files

  • #2
    Looks pretty normal thus far. Stick with map 2 as there are few timing corrections but sometimes that can be a matter of adaptions.

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    • #3
      Great thanks. So no need to pull and re-gap the sparkplugs from what you see? Right now they're just as they came from the factory.
      The fuel source should be good and I use a fuel additive to boost octane a little.
      I forgot to mention that I installed a high-flow catted DP and after-market intake & charge pipes.

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      • #4
        I prefer to gap them to .022" for pump gas but it's not required and I don't think it will help.

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        Video of our Stage 2 LPFP upgrade installation.

        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.

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        • #5
          I decided to fuel up with a blend of E85 and 93 octane that should put me between E25 - E30. I switched to Map 4.
          would you please take a look at the log to see if things are looking OK with that setup? Thanks.
          Attached Files

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          • #6
            For some reason that log isn't at WOT. It looks normal thus far but you'll need to log at WOT to hit full boost. Do logs in 3rd gear from 2K rpms to redline at WOT on a safe private track.

            Click image for larger version

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            Click on our banner to visit our website!
            Video of our Stage 2 LPFP upgrade installation.

            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.

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            • #7
              OK, thanks - I'll try to get a better log.

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              • #8
                Hopefully this log is better.
                Also, what are the differences between map 2 and 4 as well as 3 and 5 respectively?
                Attached Files

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                • #9
                  Log looks pretty normal. The descriptions for the different maps can be found here...

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                  Click on our banner to visit our website!
                  Video of our Stage 2 LPFP upgrade installation.

                  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.

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                  • #10
                    Thanks. I had seen those very succinct descriptions but was hoping for a little more info. Also, not totally sure what it means... I assume the additive map adds 4 or 6 PSI above stock max boost whereas the absolute map pressure takes stock and added pressure into account looking for a more controlled total pressure?
                    The driving feel between Map 2 which I was running previously and Map 4 which I am running now is quite different. Map 4 seems to have a much more linear power curve and gentler initial throttle response & acceleration, so I was curious to understand more.

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                    • #11
                      Also, are AFRs in the high 14s OK for this engine? seems high compared to what I've usually read recommending AFRs in the mid 12 range... any advice or experience with this?

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                      • #12
                        Originally posted by PhantasticDad View Post
                        Also, are AFRs in the high 14s OK for this engine? seems high compared to what I've usually read recommending AFRs in the mid 12 range... any advice or experience with this?

                        I'm also wondering if 14 is the norm or not, and why not 12-13

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                        • #13
                          So I switched to Map0 and logged a pull and the AFR numbers were in the same range as with Map2 and Map4. This makes me assume that this is how BMW designed it and should be within spec for this engine... that may be a bad assumption, but it seems to make sense to me.

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                          • #14
                            I too Wondered the exact same thing with my 22' WOT I was seeing 14.2:1 AFR and I'm use to seeing 11.8-12.2 AFR make me way nervous to run boosted that lean. I saw that and immediately got out of it for fear of burning it up.

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                            • #15
                              Would you please review this log to see if there are any issues to be noted? Thanks
                              Attached Files

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                              • #16
                                Looks pretty clean. FF should learn up or you can try setting it to 50 to hit boost target.

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                                Video of our Stage 2 LPFP upgrade installation.

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                                • #17
                                  Thanks for that - pardon my ignorance, but when you say to set FF to 50 what do you mean? Do I go to User Adjustment and just type 50 into the now blank FF/WastegateAdaption field and save? Presumably, leave all other fields blank as they currently are.
                                  Also, I'm running an xHP transmission tune that removes torque limiters, and yet when I look at the log values the calc_torque field never exceeds 51 which I assume stands for 510 NM... is there something wrong with my tune or the JB4 or is that normal?
                                  Thanks for your help.

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                                  • #18
                                    If FF appears blank (it was 35)...it's because you aren't connected to the car but yes, change it to 50 and save it.

                                    I'm not sure this platform is using calctq...I never pay attention to it.

                                    Click on our banner to visit our website!
                                    Video of our Stage 2 LPFP upgrade installation.

                                    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.

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