What does Porsche have against the LSD?
09-27-2015, 03:13 PM
#31
Good faq from the gt3 guys
https://rennlist.com/forums/996-gt2-...ntial-lsd.html
https://rennlist.com/forums/gt2-and-...d-install.html
Guard rebuild
https://rennlist.com/forums/996-gt2-...ntial-lsd.html
https://rennlist.com/forums/gt2-and-...d-install.html
Guard rebuild
Last edited by Vancouver996; 09-27-2015 at 10:18 PM.
09-27-2015, 05:44 PM
#32
Three Wheelin'
10-03-2015, 07:47 PM
#35
Intermediate
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Maybe, maybe not. Check for 220 on the hood options list. The other check is to jack up the back end of the car and spin a rear wheel by hand. if the opposite side spins in the same direction, you have an LSD.
The LSD is beneficial when the wheels have different levels of traction (one on pavement, one on ice). With an identical surface, both tires will spin.
The LSD is beneficial when the wheels have different levels of traction (one on pavement, one on ice). With an identical surface, both tires will spin.
10-03-2015, 08:58 PM
#36
Race Director
Stability management plus the ABS pump can do a fine job of keeping the car pointed in roughly the right direction. Since stability management is one of the many safety features mandated by the US, Porsche _has_ to include it. When you consider that the VAST majority of drivers won't appreciate the fact that the PSM/ABS solution results in less power getting to the road, Porsche has little incentive to install a "real" LSD in a car that is already equipped with a system that can simulate the effects of an LSD anyway.
The bummer, of course, is that more and more of these stability systems are designed to be non-defeatable. Even if it has an off switch, odds are that you can't turn it off, at least not completely.
The LSD is just one more reason why I like my '96 Corvette. When I press the ASR button, the slip reduction system is REALLY off - and there's an LSD in that differential that actually works the way I want it to, and it isn't some pansy LSD that is going to need a rebuild after a couple of track sessions.
The bummer, of course, is that more and more of these stability systems are designed to be non-defeatable. Even if it has an off switch, odds are that you can't turn it off, at least not completely.
The LSD is just one more reason why I like my '96 Corvette. When I press the ASR button, the slip reduction system is REALLY off - and there's an LSD in that differential that actually works the way I want it to, and it isn't some pansy LSD that is going to need a rebuild after a couple of track sessions.
10-04-2015, 12:17 AM
#38
Since putting the guard equipped lsd in my car , it's not just traction off the line .
It's how much harder you can go into corners and have such control .
The deceleration lockup is just as important as the acceleration traction .
It's how much harder you can go into corners and have such control .
The deceleration lockup is just as important as the acceleration traction .
Last edited by Vancouver996; 10-04-2015 at 12:51 AM.
10-04-2015, 12:20 AM
#39
Three Wheelin'
10-04-2015, 10:43 AM
#41
Yeah, a Porsche mechanic was telling me even though you turn it off, if the car senses you are heading for the trees or some other extreme condition it turns itself back on.
10-04-2015, 02:12 PM
#42
Three Wheelin'
Maybe, maybe not. Check for 220 on the hood options list. The other check is to jack up the back end of the car and spin a rear wheel by hand. if the opposite side spins in the same direction, you have an LSD.
The LSD is beneficial when the wheels have different levels of traction (one on pavement, one on ice). With an identical surface, both tires will spin.
The LSD is beneficial when the wheels have different levels of traction (one on pavement, one on ice). With an identical surface, both tires will spin.
Well, my thought and my friends thought of LSD is it will grab if a tire is slipping. It's not really something that happens right off the line in it's true form or at least our understanding of it - unless it's setup for a race or something.
I think I have it, and I spun out a little with one tire on gravel and the other on pavement. The one tire started to spin, then the other one grabbed and pulled me out and forward.
Not sure how that got in there as I don't have code 220, although it did seem to be a pretty sorted car when I got it (aside form the rattling muffler) so I'm thinking someone updated that at some point.
[edit] I don't have PSM, so I'm wondering if they didn't put in LSD in leiu of that option. Which also would somewhat explain why it's not on the build sheet as it wasn't, at that point, an option.
Last edited by Chiamac; 10-05-2015 at 09:32 AM.
10-04-2015, 03:34 PM
#43
Former Vendor
With these cars the LSD really helps on heavy deceleration, at high speeds on the track. When I added the LSD to my old track car the tail wagging under heavy decel stopped immediately.
10-05-2015, 01:57 PM
#44
Rennlist Member
No there is no ESP option, but if you turn off PSM, stepping on the brake pedal reactivates PSM.
