|
|
02-27-2024, 03:40 PM | #24 |
Major General
3387
Rep 7,056
Posts |
I asked my friend who’s been a BMW tech for 35+ years (he’s the lead tech at his dealership) about edc damper replacement. I asked if there’s a resetting procedure for e9x M3 edc parameters when a new edc damper(s) is(are) replaced. His reply was…he does not recall having to reset the edc module to account for the “age” of a new edc damper. He also said, there are not many M owners who have their edc dampers replaced at the dealership. However, a very large number of mostly newer 7 series models do have edc dampers replaced (under warranty) at the dealership AND they do require recoding. He said he’d verify whether new e9x M3 edc dampers require recoding to account for age, or other things, when he has time to check.
|
Appreciate
2
valve float165.50 gnx822.50 |
02-27-2024, 09:23 PM | #25 | |
Lieutenant
277
Rep 456
Posts
Drives: E53 X5, E83 X3, E93 M3
Join Date: Nov 2022
Location: PNW
|
e9X EDC Reset Routine
Quote:
https://www.m3post.com/forums/showpo...77&postcount=9 To be fair, I didn't notice any difference. But the exception isn't the rule (nor the correct procedure).
__________________
2008 BMW M3 E93 MT
R135 └┼┼┼ ..246 |
|
Appreciate
0
|
02-27-2024, 09:47 PM | #26 | |
Major General
3387
Rep 7,056
Posts |
Quote:
|
|
Appreciate
0
|
02-27-2024, 10:03 PM | #27 |
Lieutenant
277
Rep 456
Posts
Drives: E53 X5, E83 X3, E93 M3
Join Date: Nov 2022
Location: PNW
|
Whenever new EDC shocks are replaced, they must be "reset."
__________________
2008 BMW M3 E93 MT
R135 └┼┼┼ ..246 |
Appreciate
0
|
02-28-2024, 09:33 AM | #28 |
Major General
3387
Rep 7,056
Posts |
|
Appreciate
0
|
02-28-2024, 01:44 PM | #29 |
Major General
3387
Rep 7,056
Posts |
I’ll have a copy of BMW’s EDC damper replacement instructions soon. I’ll scan them in once I get them (shop computers for techs can’t create pdf files). However, the edc damper replacement instructions state to code the vehicle only when the edc module is replaced, not when an edc damper(s) is replaced. I’ve asked him to look at ABL-DIT-S3715_65STOSS to see if individual damper coding is required, why if damper coding is required, and whether it supersedes the edc damper replacement procedure.
He’s busy repairing B58 engines from X and 7 series - spring on #6 cylinder fail |
Appreciate
1
gnx822.50 |
02-28-2024, 03:33 PM | #30 | |
Major General
4586
Rep 7,208
Posts |
Quote:
Cheers |
|
Appreciate
0
|
02-28-2024, 04:47 PM | #31 | |
Major General
3387
Rep 7,056
Posts |
Quote:
|
|
Appreciate
0
|
02-28-2024, 09:16 PM | #32 | |
Lieutenant
277
Rep 456
Posts
Drives: E53 X5, E83 X3, E93 M3
Join Date: Nov 2022
Location: PNW
|
TIS Literature
Quote:
Coding has to deal with parameterization/configuration of the vehicle/unit. In this case, you can "code-out" EDC by effectively disabling it via parameterization. Resetting, in this case, has to deal with the stored values of those characteristic curves. A similar analogy is like resetting the "adaptions" of various components--like O2 readings. I listed the procedure through a hyperlink in my initial response to you. Did you read the screenshot? "The procedure for matching the [mileage] must be carried out after replacing the control unit [EDC module] or replacing the shock absorber."
__________________
2008 BMW M3 E93 MT
R135 └┼┼┼ ..246 |
|
Appreciate
0
|
02-28-2024, 11:13 PM | #33 |
Major General
3387
Rep 7,056
Posts |
RocketyMan
Coding - got it. I was incorrectly using coding. This is a real question - Where is there a source that discusses EDC module and/or EDC dampers being adjusted to account for age/mileage and/or loss of damping force over time? Is “matching the mileage” the only mention of mileage and/or age related to EDC? I have not been able to find any other reference to, or mention of, an edc age/mileage reset and/or algorithm. I’ve even tried searching for age/mileage compensation of other EDC/MR damping systems, including even academic papers. You can find information on EDC systems but nothing related to loss of performance compensation. |
Appreciate
0
|
02-29-2024, 02:36 AM | #34 | |
Major General
4586
Rep 7,208
Posts |
Quote:
(BTW what I've simply done is to hang in a amp meter while driving, see YT videos previously in this thread). I guess one could arrange a simple data acquisition system logging current and whatever sensors impacting the EDC output current such as stearing wheel angel, speed, acc sensors. But again, the current measurement is what I've done. Hence when folks (here) started to talk about the aging compensation I thought I measure current before and after clearing adaptations. Turns our ProTool doesn't support this yet, discussing this with them though so lets see. Edit: Heres one of the threads I read. Found that really interesting since I've tryed to understand my EDCs behavour for quite some time: https://www.m3post.com/forums/showth...1941136&page=2 Last edited by Helmsman; 02-29-2024 at 02:50 AM.. |
|
Appreciate
0
|
02-29-2024, 05:46 AM | #35 |
Major General
3387
Rep 7,056
Posts |
Helmsman
Thanks for the link. I tried searching site: m3post.com “search” where “search” was anything related to time, mileage, compensation, etc. Literally tried 40+ individual search terms and combo of search terms without a useful hit. Full disclosure: my ‘09 e92M3 had its EDC dampers replaced with conventional 2-way dampers after 3k miles because I did not like the suspension tuning. My (wife’s) ‘12 e92 M3 was a zcp so I could not eliminate EDC from the build and its EDC dampers were replaced after the break-in service with a conventional 1-way dampers. My ‘16 F82 was ordered without EDC. So I have very little overall experience with EDC and no experience with EDC age compensation. From what I’ve read so far it is clear the damper current is biased with mileage and/or time. If it’s based solely on mileage then your dampers would have little age compensation applied because of your low mileage yet you’ve noticed/felt a measurable change in damper performance and/or loss/lack of edc mode performance. This suggests the age compensation is exactly that - age. However, it’s more likely a relatively simple function of mileage + time since last EDC reset. Again, RocketyMan and Helmsman thanks for providing information regarding EDC age compensation. |
Appreciate
1
RocketyMan277.00 |
02-29-2024, 07:00 AM | #36 | |
Major General
4586
Rep 7,208
Posts |
Quote:
|
|
Appreciate
0
|
02-29-2024, 10:58 AM | #37 |
Major General
3387
Rep 7,056
Posts |
So true. After close to two decades of EDC use, you’d think everything about the system’s operations would be known; instead, it’s still mostly speculation.
|
Appreciate
0
|
02-29-2024, 02:52 PM | #38 | |
Major General
4586
Rep 7,208
Posts |
Quote:
Back to the EDC there is obviously far less sensors. Guess one could log wheel sensors etc but believe its a different subsystem so tricky to align/time stamp. Anyways, from what Ive seen so far of ProTool its a definite to have. Wish I got it earlier... |
|
Appreciate
0
|
02-29-2024, 03:57 PM | #39 | |
Major General
3387
Rep 7,056
Posts |
Quote:
It’s amazing how much data you can easily extract from cars now. Just 10-15 years ago you it was more difficult to access the data you wanted. A good example is the Aim Solo DL2 for collecting track data and displaying real-time data + easily sync and overlay video and data. It was much more difficult around 2010 to just sync video and speed + gear/rpm. I bet it’s easier to sync EDC data than it appears. It would be nice to collect EDC data before and after resetting EDC with the same set of old dampers as well as a collect the same data with a new set of EDC dampers when it’s time to replace them. Comparing the data should shed some insight into what the resetting process does/doesn’t do. |
|
Appreciate
0
|
02-29-2024, 09:40 PM | #40 | |
Lieutenant
277
Rep 456
Posts
Drives: E53 X5, E83 X3, E93 M3
Join Date: Nov 2022
Location: PNW
|
Quote:
or I'm thinking our cars are the latter because comfort mode is denoted as higher current. Therefore, more laminar flow would pass thru easier than fluid in a non laminar state. It also states that this is infinitely adjustable. So there's that... Anyways, great stuff.
__________________
2008 BMW M3 E93 MT
R135 └┼┼┼ ..246 |
|
Appreciate
0
|
02-29-2024, 10:55 PM | #41 | |
Major General
3387
Rep 7,056
Posts |
Quote:
EDC Damper Review https://f80.bimmerpost.com/forums/sh....php?t=1005377 F8x ZCP EDC dampers vs. Base EDC Dampers https://f80.bimmerpost.com/forums/sh....php?t=1525983 |
|
Appreciate
1
gnx822.50 |
03-01-2024, 01:57 AM | #42 | |
Major General
4586
Rep 7,208
Posts |
Quote:
Haven't seen any "live data" for the EDC/module from Carly or ProTool but maybe there are access points. Maybe Foxwell, ISTA or some other tool does? For the ouput current that is (one stage per axle). The other sensor inputs used for EDC as far as I understand are; wheel steering angle, accelerometers (three I think) and vehicle speed I guess. Haven't seen live data on the acc.meters. Anyways, for now I continue my chat with Bimmergeeks to see if they can help me clear EDC adaptations and hopefully implement the feature in the app. So far they've seem willing which is a nice sign. Cheers |
|
Appreciate
0
|
03-01-2024, 02:03 AM | #43 | |
Major General
4586
Rep 7,208
Posts |
Quote:
Edit: Found it (paper, in Swedish); confirms above technology and 3 sensor types input. Last edited by Helmsman; 03-01-2024 at 05:04 AM.. |
|
Appreciate
0
|
03-01-2024, 08:03 AM | #44 |
Lieutenant
622
Rep 629
Posts
Drives: 2009 E93 M3 DCT
Join Date: Dec 2017
Location: BC Canada
|
https://www.bimmerpost.com/forums/sh...php?p=21370133 vertical dynamics file.
It explains EDC K (Which is what we have) |
Appreciate
1
RocketyMan277.00 |
Post Reply |
Bookmarks |
Thread Tools | Search this Thread |
|
|