1000ft/lb with 6hp28 on N54? (maxed out 1060HP/920ft/lb with 6HP21)
- Thread starter Scorpstan
- Start date
its interesting because Diesel cars have max rpm 5.5k. over this rpm my car wont shift from 4th to 5th. think its an adaptation prob or maybe a Kind of Software and communication prob.
So did an adaptation reset and switch to old valve body. xhp told me it is not allowed to Mix other valvebodys with tcu (my 21 valvebody what have the same Part number). now will test shifts around 650lb.
So did an adaptation reset and switch to old valve body. xhp told me it is not allowed to Mix other valvebodys with tcu (my 21 valvebody what have the same Part number). now will test shifts around 650lb.
so, i did some runs on street with 950hp 790lbs.
same problem here. i shift at 7k....but trans wont shift. it shift if i left of pedal.
any ideas?
i am close to say that this swap doesnt work how it should be.
same problem here. i shift at 7k....but trans wont shift. it shift if i left of pedal.
any ideas?
i am close to say that this swap doesnt work how it should be.
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I’m not sure what all you have for a custom file with xhp but you may need to flash the tcu with a oem gas version for that trans first. Then load xhp. I believe the diesels have a 5500rpm limit odd that it’s only bothering you from 4-5 though. Finding the right file may be tough.
Are you manually shifting? Maybe try letting it shift itself in D or S and see if it’s tied to a certain mode.
Are you manually shifting? Maybe try letting it shift itself in D or S and see if it’s tied to a certain mode.
I had/have a similar issue but it started on just a regular OTS stage 2+ and xhp stage 3 tune and effected my 2 to 3 shift. Seemed to happen when I spun up the tires hard in 2nd and the trans refused to shift until a second after I let off the throttle, didn't happen all the time. I'm just regular 6hp21 trans, tried different tuners, had sutphin trans tune and purchased the rebuilt valve body he offers for a different issue. None of which fixed the problem. Ken did recommend I try selecting the shift bog fix in mhd, which reduced the amount of times it happened.
i have a special custom file from xhp which is designed for this swap. load it direkt on the trans. nothing with oem gas Version. just Code my VIN on it that xhp App can see it. than flashed the custom file.
yes i shift manually. can try D or S
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flashed with shift bog option didnt help.
D and S shifting didnt help too.
I noticed that as soon as the torque is over 740lbs, it no longer will shift. below 740lbs it shifts. don't know anymore what the problem here is.
i think its maybe a kind of limiter in the tcu software or DME but who knows. this project is died for me....
D and S shifting didnt help too.
I noticed that as soon as the torque is over 740lbs, it no longer will shift. below 740lbs it shifts. don't know anymore what the problem here is.
i think its maybe a kind of limiter in the tcu software or DME but who knows. this project is died for me....
Why not just adjust your load to torque tables and limit to a bit below there? The TCU should be at full clamping force at those levels, anyway.
-we did this now.
-plus got a new file from xhp
-plus support from sutphin....
results are here:
1/2 Half Mile WORLD RECORD 187,51MPH @ RACE1000 - BMW N54 335i AT Speedtech 7675Gen2 ~ 1100HP
I did some Runs with 950-1100hp(~950lbs) on 1.2 Mile RACE1000 and could rise my last World record! After some Problems in Past with correct custom file for my 6hp28 Swap, we could run 187.51mph at the end of the Day. Thanks to the Guys from XHP and Sutphin for Support for this. BMW 335i N54 AT...
www.spoolstreet.com
-we did this now.
-plus got a new file from xhp
-plus support from sutphin....
results are here:
1/2 Half Mile WORLD RECORD 187,51MPH @ RACE1000 - BMW N54 335i AT Speedtech 7675Gen2 ~ 1100HP
I did some Runs with 950-1100hp(~950lbs) on 1.2 Mile RACE1000 and could rise my last World record! After some Problems in Past with correct custom file for my 6hp28 Swap, we could run 187.51mph at the end of the Day. Thanks to the Guys from XHP and Sutphin for Support for this. BMW 335i N54 AT...
Very nice. What are you trapping in the 1/4?
Nice one!
Maybe you might benefit from a ZF TCU scanner / reader, there is quite a bit of info/data in the TCU not accessible via our regular BMW diag toolsets. These TCU's store a lot of interesting info about temps, events, errors.
See below some vendors pushing ZF diag stuff, no experience but maybe useful to know that there is some good tooling out there like:
magicmotorsport.shop
I have been working with a ZF factory tech in Germany in the past on my former ZF gearbox, learned that those TCU's are full of interesting diag stuff. He had a specific ODB ZF diag box.
Maybe you might benefit from a ZF TCU scanner / reader, there is quite a bit of info/data in the TCU not accessible via our regular BMW diag toolsets. These TCU's store a lot of interesting info about temps, events, errors.
See below some vendors pushing ZF diag stuff, no experience but maybe useful to know that there is some good tooling out there like:
Software and activations - Shop | Magicmotorsport
The best products for your mechatronics workshop: chiptuning tools, ECU remapping software, key cutting machines and much more.
magicmotorsport.shop
I have been working with a ZF factory tech in Germany in the past on my former ZF gearbox, learned that those TCU's are full of interesting diag stuff. He had a specific ODB ZF diag box.
Hi all, sorry to hijack your thread here... so I'm not sure if you can (or want to) help me as I have a 2016 ford xr6 non turbo with a 6hp21. I'm just interested in putting an external cooler on it but I've had conflicting answers as to the size of the transmission cooler outlets. Apparently on the 6HP21 they are 10mm OD push in fittings and on the 6HP26 they are 16.4mm OD. I was wondering if anyone could confirm? Are the 6HP21's the same between Ford and BMW? Cheers!
Thought about doing an 8HP swap?
Haven't completed mine yet, but I'm working on putting in the ZF8HP70 in my E90 and controlling it with a Turbolamik TCU controller.
The ZF8HP70 has an output shaft around 34mm in diameter.
Snagged the gearbox from a 2016 435d and got the DomiWorks n54/n55/s55 to n57 adapter to bolt them up.
And just for those who don't know here is what the ZF transmission model nomenclature means:
Haven't completed mine yet, but I'm working on putting in the ZF8HP70 in my E90 and controlling it with a Turbolamik TCU controller.
The ZF8HP70 has an output shaft around 34mm in diameter.
Snagged the gearbox from a 2016 435d and got the DomiWorks n54/n55/s55 to n57 adapter to bolt them up.
And just for those who don't know here is what the ZF transmission model nomenclature means:
- "ZF": This stands for "Zahnradfabrik," which is German for "Gear Factory." It's the name of the company that manufactures the transmission.
(BMW part numbers replace ZF with GA, so if you're looking for and 8HP also try GA8HP70, etc..)
- "8": This number indicates the number of forward gears the transmission has. In this case, it's an 8-speed transmission.
- "HP": This stands for "Hydraulic Planetary." It refers to the type of gear system used in the transmission, which is a combination of a hydraulic torque converter and planetary gearsets. This type of system is common in automatic transmissions because it allows for a wide range of gear ratios and smooth shifting.
- "70": This number is a measure of the transmission's torque capacity. It's not an exact number, but a relative one. The higher the number, the more torque the transmission can handle. Basically, take the last two numbers, add a zero, and this is the torque the gearbox is designed to handle in Newton meters. In this case, the "70" indicates that this transmission is designed to handle a relatively high amount of torque around 700 N-m (520 Lb-ft).
- "X" or "Z": Letter is often used in ZF transmission codes to indicate that the transmission is designed for use in all-wheel drive (AWD) vehicles.
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BTW with the Turbolamik you can do crazy stuff with the gearbox like Trans-Braking and Clutch by wire which is so good drifting guys almost can't tell it's not a real manual transmission.
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