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    Limited Slip Diff Question

    Does anyone know how different (or difficult) is it to drive a car with LSD? or does it make no difference at all?

    Re: Limited Slip Diff Question

    Quote:
    993c4 said:
    Does anyone know how different (or difficult) is it to drive a car with LSD? or does it make no difference at all?



    It will make the car understeer more in slow corners, so you have to adjust your suspension (swaybars a good start) or driving style (more trail braking for instance) to compensate.

    Re: Limited Slip Diff Question

    I had posted some considerations about the options, and the -20mm chassis with LSD in particular, which I think can be dangerous for some drivers : here is the translation by Fanch of the PM I sent him about this subject:

    "What I meant regarding the -20 mm chassis doesn't concern the suspensions but the rear limited slip differential.
    During my brief test drive, I noticed that the threshold of grip of the car (due to the rear LSD) came almost instantly (It had the same effect on my Honda S2000, also due to rear LSD).
    This very sudden loss of grip can surprise certain drivers and make them do a wrong move. It seems fair to me to warn those who have never driven a powerful car equipped with that device."

    Re: Limited Slip Diff Question

    Quote:
    Grant said:
    It will make the car under-steer more in slow corners, so you have to adjust your suspension (sway bars a good start) or driving style (more trail braking for instance) to compensate.



    My old '74 IROC-911/RS had LSD and it was one of the most forgiving 911s I had ever driven at the track in its era. One could drive it like a dirt-track car!

    LSD may make the car "push" while accelerating out of slow corners, but Grant is quite correct in suggesting that only a minor driving adjustment is required to compensate.

    Drivers un-used to piloting rear-engined Porsches have something of a learning curve to overcome anyway. I wouldn't be too concerned about LSD's potential to bite the driver as long as due respect for rear-engined driving dynamics is taken into account.

    Conquering rear-engined dynamics is what makes driving 911s so rewarding for me. As long as one doesn't carry excessive speed into corners and, instead, relies on the superior traction to deliver exit power from a late-apex decision, 911s can be one of the safest fast rides on the planet.

    Re: Limited Slip Diff Question

    Quote:
    W8MM said:
    Quote:
    Grant said:
    It will make the car under-steer more in slow corners, so you have to adjust your suspension (sway bars a good start) or driving style (more trail braking for instance) to compensate.





    Conquering rear-engined dynamics is what makes driving 911s so rewarding for me. As long as one doesn't carry excessive speed into corners and, instead, relies on the superior traction to deliver exit power from a late-apex decision, 911s can be one of the safest fast rides on the planet.



    Well said: The golden rule for 911s, Mike!

    SLOW IN, FAST OUT!

    Re: Limited Slip Diff Question

    Quote:
    W8MM said:
    Quote:
    Grant said:
    It will make the car under-steer more in slow corners, so you have to adjust your suspension (sway bars a good start) or driving style (more trail braking for instance) to compensate.



    My old '74 IROC-911/RS had LSD and it was one of the most forgiving 911s I had ever driven at the track in its era. One could drive it like a dirt-track car!

    LSD may make the car "push" while accelerating out of slow corners, but Grant is quite correct in suggesting that only a minor driving adjustment is required to compensate.

    Drivers un-used to piloting rear-engined Porsches have something of a learning curve to overcome anyway. I wouldn't be too concerned about LSD's potential to bite the driver as long as due respect for rear-engined driving dynamics is taken into account.

    Conquering rear-engined dynamics is what makes driving 911s so rewarding for me. As long as one doesn't carry excessive speed into corners and, instead, relies on the superior traction to deliver exit power from a late-apex decision, 911s can be one of the safest fast rides on the planet.



    Could not have been summarized better... tnx!

    Re: Limited Slip Diff Question

    Well said!

    Re: Limited Slip Diff Question

    If you are referring to the -20mm sport suspension for the 997 w/ LSD, then the suspension is already tuned to work with the LSD (this is the reason that the two options are not available independently). You should have no surprises with this option, particularly with PSM to help as well. I think it's a great option and one that I would surely order if I were to order a 997

     
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