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BMW 3-Series (E90 E92) Forum
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N54 Throttle Sensitivity Discovery thread
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05-07-2019, 01:06 PM | #45 | |
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Zeroed the clutch intervention table - no faults. Didn’t feel this table do anything ... |
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05-07-2019, 03:15 PM | #46 | ||
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Drives: 2009 e92 335i MSport DCT
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Im interested to learn more. Does it still creep on level ground foot of the brake and no throttle? Also I believe the 1M DCT tables will be the same as the z4is tables(same engine tune) and so the EGS version to use with IKMOS is likely the z4is one. The only thing it wouldn't have is the adjustable launch control. The 1M would have the M Drive additions and a number of people have converted their DCT cars with M3 shifter and TCU Software in an effort to retrofit. (I think youre a member of that forum and thread ?)Anything you find relating to Mdrive we'd be appreciative of over there. LMB335IS dyezak You might want to read this ...
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05-07-2019, 05:27 PM | #47 | ||
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Also, we need to start commenting what trans is being tested on in each post. Quote:
I did confirm that clutch 1 is engaged the entire time RPM is wandering (or at least showing engaged) and that clutch torque and pressure are what are actually moving with it, so might be able to settle it back down with other torque changes in the DME still. Still creeps off brake. I found a switch for drive off related to brake pedal, but that did not change anything. That might be in the TCU and/or use the brake light switch as a trigger, like it does for launch control. I have no interest in doing the entire M3 drive line swap, mostly just to get DriveLogic, nor would I want a 3.15 FD even if I did. I'm curious about the 1M version of sport and DriveLogic now though, especially if only 335is or Z4is EGS/DCT ZB are needed. I haven't completely given up hope on maybe getting something to work on M3 ZB while keeping the 2.56 either. There are tables in there which make me think there's an outside chance it could still be workable. It would still just be a band aid compared to the full swap though, but a discussion for a different thread. 1st gear DCT from a stop, IKM0S stock base DCT corr and half IKM0S speed corr: |
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05-07-2019, 05:51 PM | #48 | |
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I was trying to convert from the old OLS directly to my INAOS file Z4 35 IS and just could not get enough things to line up. I was close but could not get enough matching to feel good. |
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05-07-2019, 06:38 PM | #49 |
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Had the opportunity to try out I8A0S version. Loving it! Left the (AT) D mode stock, zeroed out Sport and Manual mode, very responsive no dead pedal
Stage 2+ tune Using stock throttle map. No errors so far. Last edited by TiAgAu; 05-08-2019 at 04:47 AM.. |
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05-08-2019, 02:40 AM | #50 | |
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05-08-2019, 08:07 AM | #51 |
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Thanks, those are the same as my stock values (335is). I don't think it's a problem, stock does it to a lesser degree. I'm just not a fan of having my 1st gear RPM look like a 2 year old drew a line with a crayon or the way it feels. I'll have more time to mess with it next week, something just needs to be evened out.
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05-08-2019, 09:11 AM | #52 | |
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"Throttle Angle Aggression in Overload" is another one which could be causing these issues. |
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05-08-2019, 09:18 AM | #53 |
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05-08-2019, 09:20 AM | #54 | |
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05-08-2019, 10:44 AM | #56 | ||||
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Fwiw, I noticed my takeoff felt different too, my car is a manual, but I noticed that I need to slip the clutch more on takeoffs, and I needed more throttle (otherwise the engine will stall). I got used to it very quickly though, my takeoffs now are just as normal as before. But that's obviously because the human factor adapts much easier and quicker to these things. Maybe if you reset the DCT adaptations it could help with a smoother takeoff/smoother clutch take-up from a standstill. Quote:
The DCT tables in the IKM0S don't do anything, there was never an intention to make a DCT 1M either, there's no pre-production 1M DCT ZB... etc. the only reason these tables are there, is because BMW have a habit of copying all tables to the bin whether they're used or not, and they only modify the tables that require modifying for the specific application. For example, IKM0S has tables for the exhaust flap operation, but the 1M doesn't even have an exhaust flap, so yeah the tables don't do anything on the 1M, and they were just copied across for the sake of it, but they're unmodified for the application and they don't do anything. That's how BMW have always done things. If I were them, I'd zero out all the unused tables, to avoid confusion imo. Quote:
I am working on discovering the real deal M Drive it's very time consuming, but I might have gotten closer to the solution today, I'll do some testing this Friday hopefully. LMB335IS and dyezak, you both have IKM0S bins already running on your cars, as mentioned above, the DCT tables on the IKM0S are untouched from previous bins revisions. That means that you guys aren't enjoying any of the additional responsiveness of the IKM0S, as only the manual throttle correction tables are zeroed out, DCT and AT throttle correction tables are just standard (check screenshot below, I marked the manual throttle correction table in green, it's all zeroed out from factory on the 1M). This might explain why you guys didn't report any differences in throttle responsiveness when you moved to IKM0S on your 335is DCT, but as soon as I flashed IKM0S to my manual 335i, it was like a revelation, I could immediately feel the difference in response I documented it in my build thread here and here.
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05-08-2019, 11:34 AM | #57 |
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Yeah, it's RPM mostly and on an otherwise stock rom, nothing to do with limits or monitors. Speed needs to stay at 1.0 down low for sure, might even need to raise base at low speed through 1500-2000rpm.
Watered down DriveLogic would be fine by me, I don't want to do the whole M3 driveline swap, but dug up most of the gear, FD and shift threshold tables, so may try at some point and see if the RPM, shifts, torque calcs, etc. might be made to work with the M3 ZB. I set the stock rom to 2.81 FD for calcs and it didn't freak. Torques are way less jumpy. I'll play with it more, but they don't even use the advertised DCT gears for calcs in all spots or even use the same ratio for the same gear in others. These are in 1KM0S, 1M DKG app switch: |
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05-08-2019, 03:58 PM | #58 |
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Drives: 2009 e92 335i MSport DCT
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Do we have access to the M3 roms to see what the settings are in those?
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05-09-2019, 07:48 AM | #59 |
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This is some really impressive work, outstanding!
If by any chance you get the time and oppurtunity, would you take a look at the E90 N55? Wondering if the N55 has the same throttle sensitivity table and if it could be modified/sharpened. |
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05-09-2019, 12:52 PM | #60 |
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As MHD is involved, I'd suspect that they have vested interest to bring this feature as an flashing option to as many platforms as they can.
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05-09-2019, 02:45 PM | #61 | |
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05-10-2019, 01:38 AM | #63 |
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05-10-2019, 03:33 AM | #64 |
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Relax man
I read it, but for example, i didn't find much details about the way it feels during spirited driving, does it make a difference in term of performance, does it trigger more DTC, or wiggles and so.. As i never tried any 1M, i guess i will have to try by myself when it's possible with MHD. |
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05-10-2019, 04:19 AM | #65 |
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The torque max difference table needs to be changed for I8AOS AT to address the 2d59 fault.
The load control reset was temporary. It came back after a day. Since that table was changed - it has been fine for days. |
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05-10-2019, 06:05 AM | #66 |
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Torque monitor max difference? I haven't had the 2D59 issue myself, but still good to know.
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