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    LSD

    Stupid Question - Can anyone explain what is the purpose for having a limited slip differential (or LSD)? Does the new 997 with PASM has it? What happens to a car if it does not have any differential (or LSD)?

    Re: LSD

    - To lock both wheels.

    -No, gotta equip it.

    -If a car does not have a LSD their are many other combinations of differentials it can have. Most of the time on lots of newer cars they have a simple open differential. When the open differential is stressed, power is sent to the wheel with less resistance. It is meant more for daily driving, and cornering on a two-lane street. A torsen differential is the exact opposite. The power is transfered to the wheel with more grip.

    Re: LSD

    What type of slip differential does the 997S (with PASM) has?

    Re: LSD

    Quote:
    superfans said:
    What type of slip differential does the 997S (with PASM) has?



    none. Only with sport suspension it has one.

    AM

    Re: LSD

    If there is no slip differential, then how can the drive wheels turn at different rates from each other? When making a turn, the inside wheel will need to spin at a slower rate than the outside wheel, right? Any idea?

    Re: LSD

    Saw the title of this post and thought it had something to do with Throts hair...

    Re: LSD

    The following website explains everything you could possibly need to know about differentials:

    http://auto.howstuffworks.com/differential.htm

    Re: LSD

    easy rider911, thanks for the info. Since the 997S does not have limited slip differential, does it then use the open differential?

    Re: LSD

    Yes - I believe that an open differential is correct for the 997 & 997S with their respective standard suspension set up.

    The 40th edition 996 had a LSD, sport suspension, X51 flared rockers, GT silver - what a great car.

    Re: LSD

    Actually the regular 997S with PASM seems to use something called the "Active Brake Differential". What is the difference between the Active Brake Differential and LSD? Thanks in advance.

    Re: LSD

    Quote:
    nick997 said:
    Saw the title of this post and thought it had something to do with Throts hair...



    No Nick, I got the real throt..
    /uploads/147886-afro7.jpg

    Re: LSD

    Quote:
    superfans said:
    Actually the regular 997S with PASM seems to use something called the "Active Brake Differential". What is the difference between the Active Brake Differential and LSD? Thanks in advance.



    The ABD is an "electronic" substitute that uses the brakes to stop the wheel from spinning free due to the open differential and stealing all the troque from the other wheel that has the grip. The LSD on the other hand is a true "mechanical" differenctial.
    The ABD is not as effective as a the LSD, its less sport and more "intrusive". The ABD is tied to the PSM system, but when you turn off the PSM the ABD remains always activated, it never turns off.
    So the LSD is better, and more fit for sportcars. But the ABD is better than just having an open differential.

    Re: LSD

    You got my sissy greg ............. .
    /uploads/148143-147886-afro7.jpg

    Re: LSD

    Quote:
    Carlos from Spain said:
    Quote:
    superfans said:
    Actually the regular 997S with PASM seems to use something called the "Active Brake Differential". What is the difference between the Active Brake Differential and LSD? Thanks in advance.



    The ABD is an "electronic" substitute that uses the brakes to stop the wheel from spinning free due to the open differential and stealing all the troque from the other wheel that has the grip. The LSD on the other hand is a true "mechanical" differenctial.
    The ABD is not as effective as a the LSD, its less sport and more "intrusive". The ABD is tied to the PSM system, but when you turn off the PSM the ABD remains always activated, it never turns off.
    So the LSD is better, and more fit for sportcars. But the ABD is better than just having an open differential.



    every time i read that the LSD fits more to sport car... i feel sad and regretful . please do not mention about that so often

    if i am wrong please correct me: there is no way to fit an LSD to the actual 997S with PASM ...(since there will be multiple systems to correct the torque distribution conflicting?

    Re: LSD

    Don't worry about it too much, the 997 can hold its own without a LSD already. Its just one aspect of the whole car, and its not really evident unless you take the car to the limit such as very agressive street driving or track.

    Yes, you cannot fit an LSD in the PASM fitted car. They are not compatible.

    Re: LSD

    Quote:
    Carlos from Spain said:
    Don't worry about it too much, the 997 can hold its own without a LSD already. Its just one aspect of the whole car, and its not really evident unless you take the car to the limit such as very agressive street driving or track.

    Yes, you cannot fit an LSD in the PASM fitted car. They are not compatible.



    the thing is i really do not worry about the handling of the car without the LSD. i believe my problem is kind of a psychological satisfaction about how a sports car should be exact.... (i mean not because of i am driving on the limits all the time )
    thanks for the answer by the way carlos...

     
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