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BMW 3-Series (E90 E92) Forum
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N55 MEVD17 DIY Tuning
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01-25-2018, 11:31 AM | #221 |
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05-03-2018, 03:09 PM | #222 |
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nice
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05-10-2018, 08:47 PM | #223 |
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Hi guys, I seem to be a little late to this thread.
After reading it, I'm still confused as to how the accelerater pedal and commanded load are related or if they are? I'm still confused on how the request for load is calculated on the e9x n55 but my idea is to just lower the stock tables until I request a lower load or get the throttle to close because I'm over the load limit. Is there any write-up on what map/table does what or a brief description? I could be over looking this. Compared to some of the other ecus I have tuned these seem to be a complex. Although it seems like a bit before it's time as now a lot of oem seem to have adopted the torque request/load based systems. I'm going to assume this as to do with transmissions as now they can be programmed separate, and work off the same torque request values. Thanks in advance! Last edited by nick121320; 05-10-2018 at 08:54 PM.. |
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05-14-2018, 08:54 PM | #224 |
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Load Difference Ceiling
Not sure if this is helpful, but i am making small changes to different tables and seeing the results.
this maybe already be known, but I changed the Load Difference Ceiling Table to as follows: 1750rpm 65.00 2000rpm 32.50 3000rpm 22.61 3500rpm 10.79 4000rpm 5.97 5000rpm 5.00 5500rpm 3.00 6500rpm 0.00 and the results were that the throttle progressively opened earlier. https://datazap.me/u/nick121320/load...-4-16-18-35-37 I would deduce that, once the difference between the load actual and load req exceeds this value for the given rpm the throttle references the closure mapping. Anyone else have experience with this table? I plan on testing again with the values set to 3.00 from 3500rpm to 6500rpm. I am hoping this will result in better throttle response. I did reduce my load ceiling main, and currently my targets are only 6psi. |
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05-25-2018, 08:09 PM | #225 | |
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I worked hard on it and finally solved all boost problems I had before using MHD flash. Knowaday it is on commanded wgdc and the costumer asked for full boost map.... so I required to 100% on commanded tables and it is working very well. The problem was that the commanded table was wrong....
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11-11-2018, 04:26 AM | #226 |
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Is there a newer more updated XDF available for download other than the one provided by the main github repo dated 8/1/2017?
From the beginning of this thread, there was talk of a github fork with updated corrections. Did that ever happen? Thanks ! |
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03-31-2019, 05:54 PM | #228 |
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Hi there guys, definitely late to this sha-bang but wanted to know if it was possible to use my JB4 with the MHD flash, my goal is to use the JB4 as normal for mapping and the MHD flash to auto clear cat codes because of the CEL.
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04-01-2019, 02:42 PM | #229 |
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You have to use a backend flash provided by Burger tuning if you want to use the JB4 and MHD. The backend flash maps are posted on n54tech. Otherwise ditch the junk box 4 and run the MHD off the shelf maps.
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2006 Z4 M Roadster Black/Imola Red, FBO VF-Engineering, e85 Flex Fuel-Sold
2012 BMW 135i N55 DCT Alpine White/Coral Red, FBO, TBI, Full e85, JB4 BEF-Sold 2006 Z4 M Roadster Black/Black-Sold 2021 M2 Competition DCT Hockenheim Silver |
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08-14-2019, 10:24 AM | #230 | |
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08-26-2019, 01:35 PM | #232 |
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MEVD1726
I have a late model e93 that need the DME to have a bench flash in order to run MHD. My question is if I run JB4, can I run MHD back end flash without having to bench the DME? |
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08-26-2019, 10:04 PM | #233 |
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To run a BEF you need to unlock the DME still. Anything that has to do its flashing (backend FLASH) requires an unlock. If you so unlock the dme and flash a BEF make sure to change the JB4 from menu 4/3 to 4/2.
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2006 Z4 M Roadster Black/Imola Red, FBO VF-Engineering, e85 Flex Fuel-Sold
2012 BMW 135i N55 DCT Alpine White/Coral Red, FBO, TBI, Full e85, JB4 BEF-Sold 2006 Z4 M Roadster Black/Black-Sold 2021 M2 Competition DCT Hockenheim Silver |
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08-29-2019, 03:09 AM | #234 |
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Thanks for the reply. I just removed the DME from the intake to send off to unlock. I have a chance to purchase a used JB4 locally. It is from a BMW F10 5-series cars, N55 motor with Electronic Wastegate (EWG), Harness Type B. My 2012 335i also have the n55 with harness type B. Does anybody know is this JB4 will fit my car? I've read that a f30 with n55 type B harness will fit but not sure about the f10 5 series with the n55. Thanks in advance!
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08-29-2019, 09:24 AM | #235 | |
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2006 Z4 M Roadster Black/Imola Red, FBO VF-Engineering, e85 Flex Fuel-Sold
2012 BMW 135i N55 DCT Alpine White/Coral Red, FBO, TBI, Full e85, JB4 BEF-Sold 2006 Z4 M Roadster Black/Black-Sold 2021 M2 Competition DCT Hockenheim Silver |
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08-10-2020, 08:38 PM | #236 |
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I wanted to know specifically when are each of the 3 timing maps are accessed?
I have timing (main), timing (main) 2, timing (main) 3. What is each one man? Is the first only at wot? When are 2 and 3 used? Mevd17.2.6 |
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05-09-2023, 01:11 PM | #238 |
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Anyone here self tune and run mafless? One of my next projects is a hot side short intake, and running without the maf will make the design much easier. I have tried to disable the maf and my logs look great, but I still get maf related CEL. Anyone know what tables/changes to make to run mafless? I am 98G0B if that helps.
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