Can Power Steering Plus (PSP) be Retro-Deleted on a 991.2?
Discussion
I don’t need low speed assistance.
There are also mixed opinions about its relative ‘feel’ at higher speeds. I’m not sure how true this is, and may only apply to earlier derivatives.
However, I prefer as few driver interferences as possible, and for the sake of a software tweak, I’d be happy to remove it.
There are also mixed opinions about its relative ‘feel’ at higher speeds. I’m not sure how true this is, and may only apply to earlier derivatives.
However, I prefer as few driver interferences as possible, and for the sake of a software tweak, I’d be happy to remove it.
braddo said:
If I may ask, how do these electric options feel compared to the old hydraulic setups?
I was going to say older but the newest hydraulic-steered 911s are a decade old!!
on 991.1 and all 981 cars pretty nasty which is autter shame as I would have owned a 981 GTS :-( (i owned a 991.1 GTS and had to sell it after 2 months)I was going to say older but the newest hydraulic-steered 911s are a decade old!!
normal 991.2 cars only a bit less nasty
GT3 passable if it's your only car, but jump back and it can feel a bit dead till you recalbrate. I have CUP parts on mine which was a transoformation in feel and for me has made the car.
waiting for a test drive in the 718 GTS see if it has GT4 steering or nasty s
t, HM says it was good , but I don't rate his reviews as he is a JAG man and theirs is nasty so it would feel good.So it gets better and better every model but it's not hydraulic good what ever owners on here say.
Koln-RS said:
Often wondered; if PSP is just a software reprogramming of the standard Electronic Power Assisted Steering (EPAS) are there not other bespoke set ups that could be ‘tailored’ to suit a given car or driver?
Or, are there periodic software version updates available?
It's something I've wondered too. I'm guessing PS+ will just be a case of programming the servo motor to run faster/provide more assistance as slow speeds. Or, are there periodic software version updates available?
I'm guessing the rack is a mechanically variable ratio item ? and assistance from the servo motor is reduced as the speed of the car rises. I wonder if the GT3/RS/GT2 cars use some form of additional g sensor alongside the vehicle's speed sensor which is then used to reduce assistance as the g loads on the car increase.
The 981 Spyder used the 991 Turbo's steering rack AND a smaller diameter steering wheel, which would tend to indicate the racks themselves do differ mechanically.
And a polite request David, rather than just stating that "the steering fitted to A,B & C is s
t" and "that the steering fitted on D is completely st", it would be really useful if you'd explain what it is that's lacking from your perspective, be it weight, consistency of weight, lack of feel/ feedback etc, as repeatedly saying something is st just makes it sound as if you don't have the diction to elucidate what the drawbacks of the EPAS steering systems are, when it's clear you do 
Edited by Slippydiff on Thursday 22 October 10:01
Koln-RS said:
Often wondered; if PSP is just a software reprogramming of the standard Electronic Power Assisted Steering (EPAS), are there not other bespoke set ups that could be ‘tailored’ to suit a given car or driver?
Or, are there periodic software version updates available?
If they did updates that improved your car then you might be less inclined to purchase the newest shiny model with 'better steering'.Or, are there periodic software version updates available?
Geneve said:
I don’t need low speed assistance.
There are also mixed opinions about its relative ‘feel’ at higher speeds. I’m not sure how true this is, and may only apply to earlier derivatives.
However, I prefer as few driver interferences as possible, and for the sake of a software tweak, I’d be happy to remove it.
It's a simple plug in and turn on/off. When it is on it only affects the steering at low speeds, at higher speeds it is effectively not there so there is no difference in high speed feel with it added or removed from the car.There are also mixed opinions about its relative ‘feel’ at higher speeds. I’m not sure how true this is, and may only apply to earlier derivatives.
However, I prefer as few driver interferences as possible, and for the sake of a software tweak, I’d be happy to remove it.
Slippydiff said:
And a polite request David, rather than just stating that "the steering fitted to A,B & C is st" and "that the steering fitted on D is completely st", it would be really useful if you'd explain what it is that's lacking from your perspective, be it weight, consistency of weight, lack of feel/ feedback etc, as repeatedly saying something is st just makes it sound as if you don't have the diction to elucidate what the drawbacks of the EPAS steering systems are, when it's clear you do
complete lack of feed back on what the tyres are doing esp in the wet, you drive on faith and what you think it can do and have to be reactive over knowing the grip limits before it lets go. You cannot drive them in the wet at 100% imo. In the dry you can use other senses and a sim helps hone these senses which are maybe 2nd and 3rd for a old school driver. But EPS is poor, Monoballing my GT3 all round has given back that feel on the road, the nvh noise which monoballs have added have offset the EPS a lot, but I don't get 996 GT3 like unwanted noise so a win win, but then the GT cars differ a lot over the non GT cars and the EPS is quite good to start with on the GT3.t" and "that the steering fitted on D is completely st", it would be really useful if you'd explain what it is that's lacking from your perspective, be it weight, consistency of weight, lack of feel/ feedback etc, as repeatedly saying something is st just makes it sound as if you don't have the diction to elucidate what the drawbacks of the EPAS steering systems are, when it's clear you do I can now again tell the surface change though the wheel over through the bum to give me confidence in driving it harder faster etc.
For me "confidence" in the car is key to being fast.
My 981 SPyder was not nice at all and I ran that all though winter lol , the 991.1 GTS worse still, so bad I had to sell it even after a set of PS4S.
you jump back in a fully monoballed 987.2 car and you have every thing you need to pilot a car in all weathers at 100% even over.
I am suprised no one cracked the EPS code as it would transform a 981 car, the 981 GT4 was pretty good if a 981 GTS was that good it would be a great car.
Edited by Porsche911R on Thursday 22 October 11:14
Porsche911R said:
complete lack of feed back on what the tyres are doing esp in the wet, you drive on faith and what you think it can do and have to be reactive over knowing the grip limits before it lets go. You cannot drive them in the wet at 100% imo. In the dry you can use other senses and a sim helps hone these senses which are maybe 2nd and 3rd for a old school driver. But EPS is poor, Monoballing my GT3 all round has given back that feel on the road, the nvh noise which monoballs have added have offset the EPS a lot, but I don't get 996 GT3 like unwanted noise so a win win, but then the GT cars differ a lot over the non GT cars and the EPS is quite good to start with on the GT3.
I can now again tell the surface change though the wheel over through the bum to give me confidence in driving it harder faster etc.
For me "confidence" in the car is key to being fast.
My 981 SPyder was not nice at all and I ran that all though winter lol , the 991.1 GTS worse still, so bad I had to sell it even after a set of PS4S.
you jump back in a fully monoballed 987.2 car and you have every thing you need to pilot a car in all weathers at 100% even over.
I am suprised no one cracked the EPS code as it would transform a 981 car, the 981 GT4 was pretty good if a 981 GTS was that good it would be a great car.
Did the 981 GT4 not use the rack taken straight from the 991.1 GT3 along with all the other front suspension components ? I can now again tell the surface change though the wheel over through the bum to give me confidence in driving it harder faster etc.
For me "confidence" in the car is key to being fast.
My 981 SPyder was not nice at all and I ran that all though winter lol , the 991.1 GTS worse still, so bad I had to sell it even after a set of PS4S.
you jump back in a fully monoballed 987.2 car and you have every thing you need to pilot a car in all weathers at 100% even over.
I am suprised no one cracked the EPS code as it would transform a 981 car, the 981 GT4 was pretty good if a 981 GTS was that good it would be a great car.
That begs the question, are there different (mechanically, rather than software programming) racks used across the 991/981 range ? Perhaps three ? The one used on all the 981 Cayman/Boxster GTS, S and base cars, a slightly faster rack used on the Turbo (and the one allegedly used on the 981 Boxster Spyder ?) And a different rack used on the 981 GT4, Gen 1 GT3/GT3RS ?
Slippydiff said:
Did the 981 GT4 not use the rack taken straight from the 991.1 GT3 along with all the other front suspension components ?
That begs the question, are there different (mechanically, rather than software programming) racks used across the 991/981 range ? Perhaps three ? The one used on all the 981 Cayman/Boxster GTS, S and base cars, a slightly faster rack used on the Turbo (and the one allegedly used on the 981 Boxster Spyder ?) And a different rack used on the 981 GT4, Gen 1 GT3/GT3RS ?
I guess 3 at least, but it's all about the calibration and it's a shame no ones cracked it, A engine remaps, no one cares and you get 10 bhp for £1k on NA cars bar the 981 GT4 where you can get a big uplift.That begs the question, are there different (mechanically, rather than software programming) racks used across the 991/981 range ? Perhaps three ? The one used on all the 981 Cayman/Boxster GTS, S and base cars, a slightly faster rack used on the Turbo (and the one allegedly used on the 981 Boxster Spyder ?) And a different rack used on the 981 GT4, Gen 1 GT3/GT3RS ?
I would pay £1k for a eps remap on a 981/991 GTS to make it feel like a 991.2 GT3.
Slippydiff said:
Did the 981 GT4 not use the rack taken straight from the 991.1 GT3 along with all the other front suspension components ?
That begs the question, are there different (mechanically, rather than software programming) racks used across the 991/981 range ? Perhaps three ? The one used on all the 981 Cayman/Boxster GTS, S and base cars, a slightly faster rack used on the Turbo (and the one allegedly used on the 981 Boxster Spyder ?) And a different rack used on the 981 GT4, Gen 1 GT3/GT3RS ?
I'm not sure about 991/981s but often there's no physical difference between racks of different 911s. On the 996/986 for instance, there's no difference between a Boxster steering rack and a 996 GT3. Even the Cup car is identical except for travel restrictor on the ends of the rack to stop the tyres fouling the arches. Don't know if Porsche charge the same though...That begs the question, are there different (mechanically, rather than software programming) racks used across the 991/981 range ? Perhaps three ? The one used on all the 981 Cayman/Boxster GTS, S and base cars, a slightly faster rack used on the Turbo (and the one allegedly used on the 981 Boxster Spyder ?) And a different rack used on the 981 GT4, Gen 1 GT3/GT3RS ?
Geneve said:
Does anyone know any U.K. OPC who has done this?
Mine haven’t, so just want to confirm to them that it’s possible.
yes we need to know 100% if it's possible, as the nice green GTS at Leicester has it, and I might go for it if you can undo Power steering plus.Mine haven’t, so just want to confirm to them that it’s possible.
Not talking the risk other wise. it was never good in the past so screw being a Guinea Pig.
Geneve said:
Yes, exactly my view.
PSP may be fine, but wouldn't want to buy a car and then find it spoils the whole experience and isn't reversible.
Which OPCs have de-commissioned it?
Some bedtime reading for you that sounds encouraging PSP may be fine, but wouldn't want to buy a car and then find it spoils the whole experience and isn't reversible.
Which OPCs have de-commissioned it?
https://rennlist.com/forums/991/1136625-ct-owners-...
Gassing Station | 911/Carrera GT | Top of Page | What's New | My Stuff