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Personally I'd play with camber, toe, and tire pressure if I wanted to change the car's turning behavior before I even think about steering software. But that's just me.
Very good point
My previous GTS had a very aggressive "track" alignment ( from previous owner) and although it was identical to my current GTS, the turning and mid-corner behavior was almost like a different car, (in a very good way)
unfortunately the aggressive alignment meant the car would wander all over the road if the road had any imperfections making it difficult to daily drive. I eventually had the dealer re-align the car to factory spec and it was a night and day difference,
I am not too savvy around the subject of toe/camber changes but those familiar with track focused alignment can probably attest that "turn in" and mid-corner" feedback can be exponentially improved via track alignment.
That said, the EPS software versions can absolutely vary between model line ups and provide very different feedback and experience. Since the software decides how much turn in would be allowed based on steering input from driver, I am imagine it can make a huge difference.
lovig this thread, so much new and interesting information.
Very good point
My previous GTS had a very aggressive "track" alignment ( from previous owner) and although it was identical to my current GTS, the turning and mid-corner behavior was almost like a different car, (in a very good way)
unfortunately the aggressive alignment meant the car would wander all over the road if the road had any imperfections making it difficult to daily drive. I eventually had the dealer re-align the car to factory spec and it was a night and day difference,
I am not too savvy around the subject of toe/camber changes but those familiar with track focused alignment can probably attest that "turn in" and mid-corner" feedback can be exponentially improved via track alignment.
That said, the EPS software versions can absolutely vary between model line ups and provide very different feedback and experience. Since the software decides how much turn in would be allowed based on steering input from driver, I am imagine it can make a huge difference.
lovig this thread, so much new and interesting information.
To me, having a different steering feel(more or less power assist) does not change the tire grip. A lot of drivers like zero toe, which can make the feel "very neutral" or reduced resistance or can also be interpreted as less feel. Some drivers prefer the very neutral, some not. Example, toe-in generally increase resistance that can be interpreted as more feel.
Totally understand that adjusting steering resistance and possibly varying steering ratio is another tool in the tool box. And sounds like fun to play with.
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Totally understand that adjusting steering resistance and possibly varying steering ratio is another tool in the tool box. And sounds like fun to play with.
I would love for someone with much more experience/capability like yourself to try the software calibration changes next time you have a 991.1 C2S on hand and give your thoughts on it.
nhnguy12, i love AZ88. oblig pic from my last drive there.
i'd really like to hear someone else's impression of the difference on a 991.1 with the error from just a drive around the block with the GT3 dropdown checked.
If you can figure out how to do this without physically changing the hardware that would be pretty great. I think everyone should update the calibration if that's the case.
I'm working on getting a PIWIS to pursue the firmware update, in the meantime, if you have the time, could you please share some of the rest of your coding settings on your EPS module? Maybe there is something else that isn't standing out. I did try enabling 'Servotronic' option but no change there.
Would love to see a newer 991.1/2 successfully try this setting change. If anyone is on Long Island, come on by, only takes a minute. Coding is very different than flashing, which can be scary. Coding is like going to the preferences section of an application and making a setting change vs installing/updating software.
Last edited by AdamSanta85; 03-13-2023 at 01:09 PM.
nhnguy12, i love AZ88. oblig pic from my last drive there.
[...]
i'd really like to hear someone else's impression of the difference on a 991.1 with the error from just a drive around the block with the GT3 dropdown checked.
Obligatory pic I took while testing out the new EPS calibration (pls don't ban me from 991 sub lol):
Have you had the chance to drive the car quickly since making the update?
To me, having a different steering feel(more or less power assist) does not change the tire grip. A lot of drivers like zero toe, which can make the feel "very neutral" or reduced resistance or can also be interpreted as less feel. Some drivers prefer the very neutral, some not. Example, toe-in generally increase resistance that can be interpreted as more feel.
Totally understand that adjusting steering resistance and possibly varying steering ratio is another tool in the tool box. And sounds like fun to play with.
Thanks, Tom. I tried removing the DSC, but it didn't make a difference. I already have aggressive-ish alignment, good tires, etc. Definitely went a long way. I think my steering is already pretty firm and responsive. However, the hacker in me just can't resist temptations like this...
Obligatory pic I took while testing out the new EPS calibration (pls don't ban me from 991 sub lol):
Have you had the chance to drive the car quickly since making the update?
great pic!
no, i haven't pushed it at all just driven around the block a few times.
the last time i swapped back to normal i could feel the difference in reverse pulling out of the driveway. it feels as thought the EPS is actively adding resistance in normal mode.
Hello again! I believe I found the way to deactivate the error thrown by the EPS module. I went into engineering mode and singled out all the MFD warning lights that mention "steering":
I think the most likely suspect is code (121). I would change that to "nicht aktiv" and take the car out for a spin before going too crazy with trying to force-update the module or replacing any physical components. Based off jfischet's feedback it seems like calibration runs fine without changing anything else on the car. Hopefully someone can test this out and let us know if it works.
Hello again! I believe I found the way to deactivate the error thrown by the EPS module. I went into engineering mode and singled out all the MFD warning lights that mention "steering":
I think the most likely suspect is code (121). I would change that to "nicht aktiv" and take the car out for a spin before going too crazy with trying to force-update the module or replacing any physical components. Based off jfischet's feedback it seems like calibration runs fine without changing anything else on the car. Hopefully someone can test this out and let us know if it works.
great work!
I'll try to update this setting this weekend and report back.
i also had been thinking about trying some of the other steering maps to see if i could feel the difference.
(if, for example, the 4S map feels exactly the same as the GT3 map then that could mean the error is valid and the steering software is going into some sort of default mode, which is why it feels very different from the S map.)
I'll try to update this setting this weekend and report back.
i also had been thinking about trying some of the other steering maps to see if i could feel the difference.
(if, for example, the 4S map feels exactly the same as the GT3 map then that could mean the error is valid and the steering software is going into some sort of default mode, which is why it feels very different from the S map.)
Sounds like a good excuse to pay a visit to Tortilla Flat
first: confirmed, setting (120) and (121) to inactive suppresses the warning on the dash.
second: the C4/S setting feels almost exactly the same as the C2/S one and the GT3 file feels much different, better, lighter. this was still just around the neighborhood.
not going to be able to get in a good drive until after the end of next week.
first: confirmed, setting (120) and (121) to inactive suppresses the warning on the dash.
second: the C4/S setting feels almost exactly the same as the C2/S one and the GT3 file feels much different, better, lighter. this was still just around the neighborhood.
not going to be able to get in a good drive until after the end of next week.
Thanks for testing that out. Curious to see more people give it a go and share their experiences. A few more people have updated their steering on the 981 forum and seem to be happy.
03-13-2023, 11:43 AM
