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  1. I have had the same issue more or less. I did a...

    I have had the same issue more or less. I did a transmission swap from a C7 GS M7 to Z06 M7 gearbox on my Katech C7GS . I changed the ratios in the table and it does not work. Only thing that worked...
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    Hi, just had a somewhat similar issue with my a...

    Hi, just had a somewhat similar issue with my a gearbox swap on my C7GS on which I just installed a Z06 M7 gearbox with different ratios. Table ECM 20090 does not update the tables as it should and I...
  3. I just found a temporary solution : disabling the...

    I just found a temporary solution : disabling the VSS sensor in the Trans menu and configuring my Driver Demand table in RPM instead of VSS and activating " Use calculated VSS "

    It has its caveats...
  4. i spoke too fast. Running the Z06 program creates...

    i spoke too fast. Running the Z06 program creates all short of other issues on the fueling/TPS and some sensors (knock retard sensors are not working anymore)

    Gearing works but too risky for the...
  5. I spoke too fast. Running the Z06 program creates...

    I spoke too fast. Running the Z06 program creates all short of other issues on the fueling/TPS and some sensors (knock retard sensors are not working anymore)

    I'm back to square one...
  6. Answer : it works. Had to rewrite all the tables...

    Answer : it works. Had to rewrite all the tables though.
  7. Got it guys. If someone tries the same thing one...

    Got it guys. If someone tries the same thing one day. To bypass the fact that table 20090 is not working, i did a segment swap using a M7 Z06 file that had the same OS number than my original tune. ...
  8. By swapping the engine operation segment I was...

    By swapping the engine operation segment I was able to get the Z06 ratios in the trans menu. Now will it work if I change all my tables back to LT1 ???
  9. Which segment would you swap ? You don't have a...

    Which segment would you swap ? You don't have a transmission segment for manual transmissions...

    I found a C7Z file with the same OS than my GS and the files I have :

    - System
    - Fuel system...
  10. C7 GrandSport : Manual gearbox swap Z51 to Z06 : Table 20090 not working ?

    Hi,

    I have 2017 C7 GrandSport where I already put a Katech stage 2 engine, which I successfully tuned.

    I do not like Z51 gearing that comes with the GrandSport, so I bought and swapped myself...
  11. Up ! Any ideas ? I submitted a ticket and a HP...

    Up ! Any ideas ?

    I submitted a ticket and a HP Tuners software engineer is going to look at it, issue is that I don't know how long it will be before it is figured out. I know some shops did...
  12. Question : until I figure out the issue, is there...

    Question : until I figure out the issue, is there any way to prevent the engine to go in reduced power mode ?
  13. I did not. I read that it is not recommended and...

    I did not. I read that it is not recommended and that there is a risk a briking the ECM ?

    Clearly the ECM is not taking the new ratios. I tried this morning putting back Z51 ratio and then Z06...
  14. Nope...nothing stored When I got the "5th gear...

    Nope...nothing stored

    When I got the "5th gear wrong ratio" DTC though I also got a "wrong data sent by ECM" DTC.

    The more I think about it, the more it looks like HP tuners did not send the...
  15. Edit : Found the exact ratios with all the...

    Edit : Found the exact ratios with all the decimals : Same issue.

    Also got a 5th gear wrong ratio stored in the pcm, lost the gear indicator on the dashboard. Came back after I cleared the code......
  16. C7 GrandSport M7 Z06 gearbox swap "reduce clutch usage - power reduced" issue

    Hi,

    Just finished my transmission swap. (C7 GS with Katech stage 2 cammed engine, 555 WHP)

    Updated the ratios in the trans menu. Only first 2 decimals though (original has 4 decimals)

    No...
  17. Looks like it solved it, at least on 91 :). I...

    Looks like it solved it, at least on 91 :). I need to try on E85 as I do not remember if I had the issue on 91...
  18. Thanks for the tip, I'll give it a try ;) I'll...

    Thanks for the tip, I'll give it a try ;)

    I'll report if it fixes it. Though like you, after looking at it I do not see how it could fix DFCO ?? But at this point everything is worth trying...
    ...
  19. I just put back my prediction coefficients in...

    I just put back my prediction coefficients in dynamic airflow to OEM (everything was 0'd)

    When the weather will permit, I'll do a test
  20. Thanks I'll try that. How can that impact DFCO...

    Thanks I'll try that. How can that impact DFCO though ?

    Edit : my VE was made with my wideband. I compared the values with stock and at low load and low rpm on my new table is very close to OEM
    ...
  21. Your are definitely getting some torque...

    Your are definitely getting some torque management around 4300rpm and at 6000 rpm (but less) ....Why I don't know...
    Even if TCS seems ok did you try to disable it ? Your virtual torque table may be...
  22. Anyone ?? I spent again some time yesterday...

    Anyone ?? I spent again some time yesterday trying to figure it out with no luck....:banghead:
  23. DFCO issue with Dynamic Airflow enabled : Lambda stuck at 0.55 sometimes

    Guys,

    I'm fighting an issue with DFCO when Dynamic airflow is enabled... Working on finalizing driveability of the car...When I tuned on the dyno engine made 555WHP/490WTQ on E75 (Katech Stage 2...
  24. Indeed !

    Indeed !
  25. Putting back my min and long spark table to stock...

    Putting back my min and long spark table to stock (except 0.08-0.16) solved my dfco transition. I'm really surprised how much impact this table has on dfco transition
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