|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Search | Today's Posts | Mark Forums Read |
|
BMW 3-Series (E90 E92) Forum
>
Automatic Transmission Tuning ZF6HP19 First Generation
|
|
03-15-2017, 06:04 PM | #23 |
Captain
253
Rep 775
Posts |
CAN-bus doesn't seem to have a mechanism to send a throttle value over 100%
Also want to point out the kickdown switch isn't really a switch - it's just a dummy button. DME just flags kickdown based on the throttle position. |
Appreciate
0
|
03-16-2017, 07:21 AM | #25 | |
Colonel
996
Rep 2,287
Posts |
Quote:
Right now its going to be tough simply correctly identify the dozen or so adaptive maps and figure out how the gearbox switches from each. The manual maps are the easy ones, I've found two and one looks like it's never used. It's also easy to figure out how that mode is selected. Its the sport and economy maps that get a little tricky. Some are obvious but others take more time to study. I still have not found a flag that indicates what map is currently in use. I'm not sure that I really care, Once I have them grouped, between Sport, economy, downhill etc I would advocate making percentage changes to the hole group rather than any specific map. In reality the base shift maps are pretty good for my car. The sport maps became usable with the new 190KW calibration file for the 3.0SI. If you upgraded your engine from a 325, without a doubt you should try the transmission software for the higher output car. |
|
Appreciate
0
|
03-16-2017, 07:55 AM | #26 |
Major
183
Rep 1,017
Posts |
My first mod was the sport button retrofit and its true what they say about it,so a switch can change multiple parameters. Whether or not the shifts could be more firm wit h software, it would be nice, the early 335 guys are looking for something similar. Being that I have the 525, with my mods now, im just shy of 530 power, not tuned for 3si, but doing headers and exhaust. I may use this trans for my n54 swap.
|
Appreciate
0
|
03-16-2017, 08:45 AM | #27 | |
Colonel
996
Rep 2,287
Posts |
Quote:
If you have the ZF box I'm pretty sure we can raise the limiters but I don't know the safe limit yet. Ive read 7200 but I don't know anyone testing this yet. |
|
Appreciate
0
|
03-16-2017, 08:47 AM | #28 |
Major General
3940
Rep 7,216
Posts |
Unless we figure ZF designed the transmission to the hairy edge of it's limitations - 7350rpm is only 5% higher than stock. But that will only be a benefit if you're actually making power there, most N52s (even tuned) aren't doing anything past the stock redline anyway.
|
Appreciate
0
|
03-16-2017, 11:21 AM | #29 | |
Colonel
996
Rep 2,287
Posts |
Quote:
BTW, what are you calling the stock RED Line? 6,800 7,000? |
|
Appreciate
0
|
03-16-2017, 11:30 AM | #30 |
Major General
3940
Rep 7,216
Posts |
7k is stock (approximately, it varies +/- 50 rpm or so depending on transmission). 7k was also the number used in the specification for designing the transmission.
|
Appreciate
0
|
03-16-2017, 02:40 PM | #32 | |
Colonel
996
Rep 2,287
Posts |
Quote:
The shift process is another thing. As per the attached, the converter clutch is released through the shift and only reapplied when the shift is complete. The shift itself is a crazy process with pre-charging, synchronized open and closing clutches, power reduction and torque converter clutch activation. |
|
03-16-2017, 03:53 PM | #35 |
Captain
253
Rep 775
Posts |
If you're just looking for a flash that will handle a little more power/torque than stock, the 330i euro software would probably be a decent upgrade. For truly custom stuff, that'll require more work.
And for people like Chris and me, it's hard to develop anything for the automatic transmissions. For one, we don't own cars with automatics. And since the computer is built into the mechatronics assembly, we can't just buy one cheap on eBay and mess with it on our desks like we can for DMEs |
Appreciate
0
|
03-16-2017, 05:49 PM | #36 |
Colonel
996
Rep 2,287
Posts |
I was just looking at it, I was hoping to send something out tonight or in the morning.
I'll be out of town for a week starting tomorrow. Taking a little holiday with the family so won't get much done past this evening, What was your original calibration file? I want to look at the differences between you current and original while I have it open. Do you have a true manual mode with your setup? Does moving the gearshift to the left and then selecting up or down place the transmission in manual mode? |
Appreciate
0
|
03-17-2017, 05:45 PM | #37 | ||
Colonel
996
Rep 2,287
Posts |
Quote:
Shift map selection is influenced by the rate the accelerator pedal is actuated. Faster you push the more aggressive the maps will be. For instance you can slowly push the throttle to 50% and you will be running a different map Than quickly pushing the throttle to 50%. I sort of knew this before but I'm just now beginning to understand the logic behind it. I'm pretty sure anyone running a Powerbox or similar will partially defeat the normal adaptations and move into the aggressive shift maps more quickly than BMW intended. Once you are into the sport maps all sorts of things begin to come into play. There are brake force adaptations and turning accelerations that will affect the gear selection. It's a complicated beast. |
||
Appreciate
0
|
03-18-2017, 07:43 AM | #38 |
Major
183
Rep 1,017
Posts |
Well I have the Bms box, which does raise the tpms only because it remapps the throttle, so I guess it would shift sooner. On the other hand, when I done the sport mode button, it also raises and firms the shifts. So I guess I have some options, stock no box, all 3 maps, sport mode, manual and sport manual. So I guru I can like with that for now,
|
Appreciate
0
|
03-18-2017, 08:48 AM | #39 |
Banned
536
Rep 2,825
Posts |
A+ for effort, but this is why I wouldnt settle for anything but a manual.
I have an 8 speed 2011 528i right now with the same engine as your car. I am really happy with the 8 speed, but I have been looking into 6 speed manual e90's for a while now and have seriously considered it at some point but it is unlikely I will switch due to the resale value of my car, so i am sort of stuck with it. |
Appreciate
0
|
03-18-2017, 09:17 AM | #40 |
Major General
3940
Rep 7,216
Posts |
the reality is, 90% of BMWs these days are automatic - and the stock tunes are pretty mild, just like the engine tunes. There's likely a good amount of demand for it and up until now nothing existed. Whether you personally like automatics or not is pretty much irrelevant..
|
Appreciate
0
|
03-19-2017, 12:19 PM | #42 |
Major
619
Rep 1,402
Posts |
|
Appreciate
0
|
03-26-2017, 08:59 AM | #43 |
Colonel
996
Rep 2,287
Posts |
Back from holidays,
While gone, I managed to a little work on the GKE211 maps but not much. I found a "Job" within GS19D.prg that will let me concurrently log two dozen or so parameters while retaining the 125 millisecond response time. I looked for this a long time ago and for some reason could not pull it from the list. TestO will be useful yet again. Not sure if I'll try building English translation tables within Testo or not. I'll post a few logs when I get them sorted. |
Appreciate
0
|
03-26-2017, 11:33 AM | #44 |
Colonel
996
Rep 2,287
Posts |
Gear Display (temporary)
Logging did not go well, I have some issues with TestO to resolve. Data rates look good until I try to actually log the data, then it crashes. I had this problem with the one of the knock sensor values on the DME.
Funny thing, while looking for the troublesome jobs, I found one that initialized the current gear display in the Kombi. It's temporary and clears out on an ignition recycle but proves that we can get the current gear display to show while in "D". This is a job called though TestO, I'm pretty sure tool32 would have the same result. |
Appreciate
0
|
Bookmarks |
Thread Tools | Search this Thread |
|
|