So what does LSD stand for and what is it?

 

^^ LSD= Limited Slip Differential. " A limited-slip differential prevents 100% of the power from being allocated to one wheel, and thereby keeping both wheels in powered rotation."(Wikipedia)

 

Thought about it! But then the warranty will probably exclude the differential and/or anything related to it...

 

I owned an E92 M3. Sadly, I never tracked the car, but I felt the benefits of having an LSD at times, especially during hard cornering. I think a car like M3 does need to be equipped with an LSD. FR car with a highly powerful and responsive engine.

I bought my 997.2 C2S Cab less than a week ago, so I can't really provide a good comparison at this point. However, 911 is a different car. I think the engine being at the back makes a big difference.

Plus there is always the weight aspect. I am not sure how much weight an LSD would add, but I imagine it would be significant for a car like 911. And you already have the weight of the engine on the back.

 

I drive my '09 997.2 C2 PDK on the track 4-5 times per year. My car doesn't have an LSD.

One of the tracks I attend has a sharp, 90+ degree left hand turn on a down-hill approach. Braking hard coming in slow then turning as much as I can without laying on the power too early.

On the exit, I have received comments on how hard it will accelerate, particularly of how there is no wheel-spin. When I tell them it has no LSD, they react with incredulity.

I have owned and driven other cars with LSD on the track and to be honest I can't tell the difference with the 911. The fact that the car is heavily rear-weighted lends itself to greater adhesion over the rear-axle, reducing the chance of wheel-spin and therefore reducing the need for a locking differential.

I think the weight configuration of the 911 allows designers to eliminate the need for a mechanical LSD in most cases, instead relying on PSM/ABD/EDC/ASR; The GT3 models have a LSD standard (locking: 28% on power / 40% on overrun).

 

This is the kind of info I'm fishing after...thank you sir, good to know!

 

also when going thru the tight turn(poor) cars will tend to body roll possibly lifting traction from that wheel and if that's your drive wheel then it s a problem. But the Porsches, esp the newer Porsches do not have the issue with body roll. When I thought this thru myself you have to ask yourself, this is a world class sports car, if it needed LSD it would have been used. It s engineered to be one of the best handling cars period.

Did you locate a car yet?

 

I agree...so far it appears that the common opinion is that the car does not exactly need the LSD, and yes I was watching some comparison videos and the 911 stays relatively flat when cornering!

I went to check out the car I had located this past weekend in DC/VA. Unfortunately they did not disclose it had had paint work, which I can usually spot a mile away...I passed on it, so currently looking to see what's out there.

I'm considering 06-09, but I prefer an 09. Anything up to 35-36k miles is ok, preferably CPOed if the miles are at that point.

If you hear of anything please let me know.

Thank you.

 

If you track the car hard and/or numerous times the stock LSD does not hold up. You can easily kill the clutch pack in one track season.

 

Hi Alan, I presume you would be speaking of the Stock LSD in a 997.2? Do you know if the 997.2 LSD option is the same as the standard LSD in the 997.2 GT3?

 

I found the 991 not only rolls less side-to-side, but also pitches and dives less, too. It must be because of the weight distribution of the 991; much more centred (longitudinally) than previous models.

Mine is a 997.2. When it dives and pitches, with the headlights on, you can see the HID auto-levelling system sometimes go nuts with fast minute adjustments; as you brake to a full stop behind another car you can see the HID-projector beam's horizontal cut-off bounce up and down against the background of another car's rear-bumper.

I kinda like the pitch/dive character of the 911s... Character