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/\ Interesting to hear the difference between the GT3 file and Power Steering Plus, good to know and glad to hear what you've done now is an improvement above that.
Just tried this on my CS. I didn’t have to be in developer mode to do the change!! It’s nice to have the lighter feel in the city. Haven’t had a chance to drive on the twisty roads yet.
I guess it can be intimidating.
if you have PASM it too can be changed. I’m hesitant to change PASM settings as the other options are for the 911’s. I’m thinking the 911 settings will be calibrated for a rear rear vehicle configuration as opposed to the mid rear of the 981s. Not sure how much it will change the drivability of the car
Since I too found the 981 steering feel unacceptable compared to my previous Porsches I looked into how they got the 718 steering to improve.
the power steering system part number is updated by two digits in the 718. I bet that hardware, around $500-700 from a wrecked 718 and the GT3 calibration gets you into 987 god mode steering feel.
Originally Posted by nhnguy12
Was able to code the 'GT3' power steering calibration file without a hitch:
Originally I thought I would have to push the car on some twisty roads to appreciate any differences but the changes to the EPS calibration were immediately apparent. I strung together a few errands I "needed" to get done tonight and drove around for 45 minutes or so. It's tough to describe something as subjective as steering feel but I'll try my best. Here are my very early impressions of the updated EPS calibration:
The very first thing I noticed was that the steering is now much lighter immediately off-center than before when traveling at speed. I would say about 30-40% lighter than with the original calibration. The steering no longer feels artificially heavy to me. The reduced steering effort immediate off-center definitely gives the impression of a sharper turn in and makes the car feel smaller/more agile.
The steering now loads up much more progressively than previously. I would say this "ramping up" effect is at least double what it was with the original calibration. You get a much better sense of the front tires digging in and gripping than before. Even after a pretty short drive on public roads I felt a lot more confidence what the car was doing mid-corner and how my throttle/steering inputs were affecting the balance of the car. This was my favorite change with the new calibration.
I didn't feel much change in terms of road texture being transmitted to the steering wheel. I believe this was an actual hardware change in the 2nd-generation EPAS systems introduced with the 991.2 and 718 generations. I remember the technical specs mentioning the addition of a "steering pulse generator" to give the impression of more road feel. I didn't miss the extra texture though. I think the way the steering weights up provides more useful information.
Overall I'm really happy with the changes and am pretty surprised how much of a difference it made. I would encourage anyone with PIWIS to give it a shot. I'm excited to really test it out on some twisty roads this weekend!
Since I too found the 981 steering feel unacceptable compared to my previous Porsches I looked into how they got the 718 steering to improve.
the power steering system part number is updated by two digits in the 718. I bet that hardware, around $500-700 from a wrecked 718 and the GT3 calibration gets you into 987 god mode steering feel.
I would try just the GT3 calibration first before diving into hardware changes. I don't think the steering pulse generation adds that much more in terms of useful feel. If you look at feedback from 991.1 GT3 vs 991.2 GT3 owners, there isn't a clear improvement in steering feel with the 991.2 GT3.
Successfully loaded the GT3 calibration on my car using PIWIS 3. Happy that it worked without any issue unlike trying to activate Sport+ which I haven't been able to successfully do, even with an activation code.
Haven't gone on any “spirited” drives yet, but definitely noticed the lighter/“springy” feel as noted by others. Looking forward to trying on some canyon roads this weekend.
For anyone that doesn't already access to PIWIS, a knockoff PIWIS 3 setup is much lower price of admission than PIWIS 2.
Since I too found the 981 steering feel unacceptable compared to my previous Porsches I looked into how they got the 718 steering to improve.
the power steering system part number is updated by two digits in the 718. I bet that hardware, around $500-700 from a wrecked 718 and the GT3 calibration gets you into 987 god mode steering feel.
The 987 feels different because its the last of the mechanical hydraulic rack, so none of this current electric programming stuff applies to it. That all went away when they switched to all electric racks on the 981. Doesn't mean things cant be improved on the electric versions, but it will never be an apples to apples comparison between the two models any more than modern fly by wire throttle will ever behave exactly the same as an old fashioned mechanical throttle cable did.
With the GT3 calibration, is the steering any heavier at speed and/or moderate steering angle than stock 981CS? Or is it the same with a lighter center?
With the GT3 calibration, is the steering any heavier at speed and/or moderate steering angle than stock 981CS? Or is it the same with a lighter center?
The steering weights up with increased load on the front wheels. Much more than with the stock calibration.
I get that, but it’s weighing up more than stock from a lighter center, isn’t it?
Yes. That was what I meant, sorry if I wasn't clear. So it starts off lighter than stock at center but gets heavier than stock as you add steering lock diving into a corner.
If you have a relationship with your indy you can just ask. Not necessarily the same thing, but I had Bodymotion in Ocean turn off my rising spoiler with the PIWIS and was thinking of asking them about this "upgrade".
03-17-2023, 11:33 AM
