DQ250 DSG 1st Gear APP Histogram

Stratified DSG Tune Revision – V3

Stratified Automotive Controls has been making some refinements to their DSG TCU tune based on feedback that I have given.  Previously I discussed the first round of modifications to the tune and recently I received a second update with more changes.

Updates to the tune have a heavy emphasis on part throttle response as this is the operating range that is most common during daily driving.  By way of datalogging during regular daily driving and aggregating the results of Accelerator Pedal Position (APP) for each of the gears a trend is developed, as shown on the histogram below, the trend is used as the basis for establishing the targeted engine upshift RPM versus APP input.

DQ250 DSG 1st Gear APP Histogram
DQ250 DSG 1st Gear APP Histogram

This revision to the TCU tune shows the following improvements:

  • Upshift from 1st to 2nd continues to be improved.  The minimum upshift engine speed has been raised as well as the full range of engine upshift RPM across the range of accelerator pedal input identified for improvement – i.e. part throttle range.
  • Upshift from 2nd to 3rd improves on moderately heavy APP input raising engine upshift RPM versus the previous revision.
  • Upshift from 3rd to 4th also increases engine upshift RPM at moderate APP.
  • Upshift from 4th to 5th also changes as with 3rd to 4th.
  • Upshift from 5th to 6th has an increase in the minimum upshift engine speed at low APP.
  • Forced downshift from 6th to 5th and 5th to 4th takes place with less APP.

Changes with this revision have moved the transmission response characteristics closer to the goal values.  The results have been provided back to Stratified to be used for guiding the next update.

2 thoughts on “Stratified DSG Tune Revision – V3”

  1. Thank you for all your diligence!!You are going out of your way to provide the most comprehensive info to the MK7 GTI community. Currently in the market for a Stratified DSG tune, anyway I could request your most current version with revisions from Stratified when purchasing my tune? I feel the feedback you have provided them has allowed them to make you the best tune suited for DD. Please let me know, thank you.

    1. Hey Troy, thanks for the kind words and feedback. I don’t know how Stratified handles requests for software that is in development. I believe with the TCU tunes that they need to package them for a specific transmission model number, and that might entail additional work beyond just sending the file. If that’s the case I suspect they would be reluctant to send a beta file that they know they will need to update some time later. My understanding is that the updates being made will eventually be incorporated in the version that other customers have, I’ve never been under the impression that the results of the development would be limited to my use. I just received another revision, so work is ongoing but every update has been a little better than the one that preceded it. Stratified has been busy with other work, but based on the current pace I estimate in the next 2-3 months the updates will be completed.

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