Alex
Nordschleife
- Joined
- 6 Mar 2014
- Messages
- 22,161
This has been discussed in depth a couple of years ago but seeing as I had a play in the snow today to test my AWD system I thought I'd resurrect the topic.
If nothing else, you all get to have a laugh at my expense when I fall on my 4rse at the end of the video.
So, you're driving your AWD 996 in the snow and ice and want to know what the best option is for getting up that hill. Well, the problem with PSM is, as soon as one set of wheel starts spinning, the PSM takes over, limits the revs and applies brakes where necessary. No good if you want to get those front wheels putting some effort in as the VC will only come into play when the dilatant fluid in it starts shearing and puts the front axles in motion, which is never with the PSM activated.
Deactivate the PSM and you can spin the engine up way past 2k rpm (which is where the PSM will limit it at), spin up those back wheels and start sending some serious spinning in that VC, causing the front wheel to start doing something.
I'll not waffle much more about it, but here's a quick clip I made today showing it.
Run 1 - PSM deactivated. Revs get high and fronts start spinning giving the car that extra up hill umph required.
Run 2 - PSM activated. Revs get limited at 2k, brakes applied, etc. and car trickles along with minimal to no power thrust up front.
Run 3 - Alex falls on his backside and makes a teet of himself.
Enjoy!! :thumbs:
Right, where's that boozer! :drink:
If nothing else, you all get to have a laugh at my expense when I fall on my 4rse at the end of the video.
So, you're driving your AWD 996 in the snow and ice and want to know what the best option is for getting up that hill. Well, the problem with PSM is, as soon as one set of wheel starts spinning, the PSM takes over, limits the revs and applies brakes where necessary. No good if you want to get those front wheels putting some effort in as the VC will only come into play when the dilatant fluid in it starts shearing and puts the front axles in motion, which is never with the PSM activated.
Deactivate the PSM and you can spin the engine up way past 2k rpm (which is where the PSM will limit it at), spin up those back wheels and start sending some serious spinning in that VC, causing the front wheel to start doing something.
I'll not waffle much more about it, but here's a quick clip I made today showing it.
Run 1 - PSM deactivated. Revs get high and fronts start spinning giving the car that extra up hill umph required.
Run 2 - PSM activated. Revs get limited at 2k, brakes applied, etc. and car trickles along with minimal to no power thrust up front.
Run 3 - Alex falls on his backside and makes a teet of himself.
Enjoy!! :thumbs:
Right, where's that boozer! :drink:
