Disabling Porsche PSM vs Older BMW DSC
Discussion
I'm considering a 997 2S as my next car and am still researching them. Thus, I have a question regarding PSM, which I wonder if Porsche owners could help with.
I really do like my cars quite old-school and if I could afford it, I think a 993 would suit me. I'm a bit of a hooligan and enjoy a car (or bike for that matter) getting a little crossed up occasionally.
The car I'm considering instead of a 997 is an E46 M3. They had far less intrusive electronics than the E92, such as:
DSC
Once turned off with a momentary touch of the button, it stays off.
You can use cruise control and the DSC remains off. This changed after the E46.
You can jump on the brakes, on the throttle etc and the DSC doesn't re-engage.
When on cruise control, a slide will not re-engage DSC. Again, this changed after the E46.
PSM
How long does it take to turn off? Is it a momentary press or a press and hold for 3 seconds routine?
I've read that it re-engages if you're trail braking into a corner and the rear is breaking loose. What are people's experiences with this?
I've also read on a US forum that disconnecting a wire into a part of the control system for the PSM de-activates it permanently. Has anyone here in the UK tried this?
I should add that I'm not looking to go faster by turning PSM off. It's all about the purity of driving the car like you would have done in the 70s, 80s etc, with no driver aids (besides ABS).
I really do like my cars quite old-school and if I could afford it, I think a 993 would suit me. I'm a bit of a hooligan and enjoy a car (or bike for that matter) getting a little crossed up occasionally.
The car I'm considering instead of a 997 is an E46 M3. They had far less intrusive electronics than the E92, such as:
DSC
Once turned off with a momentary touch of the button, it stays off.
You can use cruise control and the DSC remains off. This changed after the E46.
You can jump on the brakes, on the throttle etc and the DSC doesn't re-engage.
When on cruise control, a slide will not re-engage DSC. Again, this changed after the E46.
PSM
How long does it take to turn off? Is it a momentary press or a press and hold for 3 seconds routine?
I've read that it re-engages if you're trail braking into a corner and the rear is breaking loose. What are people's experiences with this?
I've also read on a US forum that disconnecting a wire into a part of the control system for the PSM de-activates it permanently. Has anyone here in the UK tried this?
I should add that I'm not looking to go faster by turning PSM off. It's all about the purity of driving the car like you would have done in the 70s, 80s etc, with no driver aids (besides ABS).
Simple press of the button switches it off on 987.1
According to the manual it only intervenes if ABS activity is triggered on the front wheels ( one wheel in normal mode, both wheels in sport mode ), you should be able to trail brake as long as you aren't locking the fronts. I've never had it intervene when switched off, certainly at the PEC Silverstone you can happily slide / spin without any intervention.
You can also use Sport mode ( if fitted ) which allows a bit more slip angle before it intervenes, enough for a little slide on a wet roundabout.
The only thing that stays on is the EDL which brakes one wheel if the other spins, kind of acting like a poor limited slip diff.
Other than that it stays off.
According to the manual it only intervenes if ABS activity is triggered on the front wheels ( one wheel in normal mode, both wheels in sport mode ), you should be able to trail brake as long as you aren't locking the fronts. I've never had it intervene when switched off, certainly at the PEC Silverstone you can happily slide / spin without any intervention.
You can also use Sport mode ( if fitted ) which allows a bit more slip angle before it intervenes, enough for a little slide on a wet roundabout.
The only thing that stays on is the EDL which brakes one wheel if the other spins, kind of acting like a poor limited slip diff.
Other than that it stays off.
cay said:
Simple press of the button switches it off on 987.1
According to the manual it only intervenes if ABS activity is triggered on the front wheels ( one wheel in normal mode, both wheels in sport mode ), you should be able to trail brake as long as you aren't locking the fronts. I've never had it intervene when switched off, certainly at the PEC Silverstone you can happily slide / spin without any intervention.
You can also use Sport mode ( if fitted ) which allows a bit more slip angle before it intervenes, enough for a little slide on a wet roundabout.
The only thing that stays on is the EDL which brakes one wheel if the other spins, kind of acting like a poor limited slip diff.
Other than that it stays off.
This also seems to be correct for the 997S.2. When I've been at Bruntingthorpe with Don Palmer - learning to drive my car (2010 997S.2) very sideways indeed - the PSM went off (and stayed off, irrespective of the amount of provocation) after a simple press of the button. That it was completely de-activated was self-evident, as its unwanted interventions were otherwise a real PITA when trying to control/maintain oversteer in a corner - it would try to do the very opposite of what I was asking the car to do. According to the manual it only intervenes if ABS activity is triggered on the front wheels ( one wheel in normal mode, both wheels in sport mode ), you should be able to trail brake as long as you aren't locking the fronts. I've never had it intervene when switched off, certainly at the PEC Silverstone you can happily slide / spin without any intervention.
You can also use Sport mode ( if fitted ) which allows a bit more slip angle before it intervenes, enough for a little slide on a wet roundabout.
The only thing that stays on is the EDL which brakes one wheel if the other spins, kind of acting like a poor limited slip diff.
Other than that it stays off.
In short, you can have all the playtime you want from a 997 by pressing the button. Nothing to worry about.
bennyboysvuk said:
This sounds very positive. Thank you.
Does it stay off if you use cruise control too?
Given that cruise control is disengaged when you touch the brake or accelerator (I think) please explain the situation you are envisaging whereby you are getting 'crossed up' while cruise control is in operation....Does it stay off if you use cruise control too?
sidicks said:
Given that cruise control is disengaged when you touch the brake or accelerator (I think) please explain the situation you are envisaging whereby you are getting 'crossed up' while cruise control is in operation....
I'm not looking to intentionally lose traction with cruise control on, however if I want to use cruise control then I don't expect my previously chosen setting of PSM-off to change. BMWs after around 2006 turn the DSC back on the moment that you use cruise control, whereas older models did not, once DSC was off, it stayed off.Gassing Station | 911/Carrera GT | Top of Page | What's New | My Stuff