Blizzard25
Well-Known Member
Finished the first mod for this project, the DQ250 has a hard limit that is un-editable set in code at 500Nm for clutch torque. Best guess on why they did this (I need to dig further, but even still would only be educated guessing), the CAN frame that holds the torque request going from ECM to TCM is only a 6 bit value. Regardless though, instead of being able to calibrate these values, they were compile time constants and are embedded in the code, so have to be patched out if you want to raise the clutch torque higher. "Stage 3", if you feel the need to stick with whatever weird naming convention for tuning the VAG community seems intent on sticking with even though I can't stand calling anything a staged tune.
If you want to see one of the 14 examples of what this looked like on my car in the assembly, well here you go:
So all this patcher does is take that static value and allow you to set it to the maximum value for its data type, which in this instance is 655Nm at 0x7FFF. I included stock/patched examples from my car in the zip file.
In order to use, it's a python script so you'll need python. Navigate to the VWscripts folder you extracted, and run "python clutchtorquepatch.py". That's it. You'll get a file dialog asking you to select your DQ250 file, and the command line should tell you how many locations got patched.
If you don't like the idea of manually doing this and are using HPT to tune, I am adding this to the HPT software and will be a free mod, so just wait a couple weeks and it'll be available for just button pressing.
Note you're still going to have to actually tune clutch torque related parameters. This patch only allows you to edit past the OEM clutch torque hard coded limits. Let me know if there are any issues.
If you want to see one of the 14 examples of what this looked like on my car in the assembly, well here you go:
So all this patcher does is take that static value and allow you to set it to the maximum value for its data type, which in this instance is 655Nm at 0x7FFF. I included stock/patched examples from my car in the zip file.
In order to use, it's a python script so you'll need python. Navigate to the VWscripts folder you extracted, and run "python clutchtorquepatch.py". That's it. You'll get a file dialog asking you to select your DQ250 file, and the command line should tell you how many locations got patched.
If you don't like the idea of manually doing this and are using HPT to tune, I am adding this to the HPT software and will be a free mod, so just wait a couple weeks and it'll be available for just button pressing.
Note you're still going to have to actually tune clutch torque related parameters. This patch only allows you to edit past the OEM clutch torque hard coded limits. Let me know if there are any issues.
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