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  1. #1
    Join Date
    Apr 2012
    Location
    Wrexham
    Age
    48
    Posts
    559

    Power lock diff question

    Hello,
    I have a 3.54 PL and its derated by Rusell.
    This has happened twice to me now so just finding out if happens to others.
    If i floor it and break traction on straight road, i can feel the rears spinning then suddenly the rear pulls to the right and car all lost it then
    I thought with PL, i should be able to spin them up and drive straight?
    When rears are spinning i dont know but i maybe backing off throttle then it might grip suddenly.
    Need a car control course really.
    Just wondering does yours with PL ones have the same effect? I.e. rear end going into right side of road direction...?
    Regards
    Gav
    AK Ls1/t56
    Body on April 2014
    Passed IVA March 2017
    Registered April 2017.

  2. #2
    Join Date
    May 2004
    Location
    Finchampstead, Berkshire, UK.
    Age
    54
    Posts
    3,683
    It’s likely to be when you lift off. Boot it and spin the wheels, you’ve steered into the slide a bit, lift off the throttle and grip is restored BUT your front wheels are now pointing at a jaunty angle and induce the famous “idiot spin”.

    Driving gods would do a Colin McRae and “never lift”, the rest of us I’m afraid just exercise more caution next time round

    Wet empty car parks might be handy to practice is....allegedly

    Jim
    GD Mk3 Jag based
    Supercharged LS1
    GD J1M

  3. #3
    Join Date
    Feb 2011
    Location
    Northampton
    Age
    41
    Posts
    4,135
    Or one of these (Andy Walsh comes highly recommended): https://www.carlimits.com/script/vie...rfieldtraining
    My DeDion build diary..
    Hon Sec of the Digidash branch of the Unpopular Kit Car Design club

  4. #4
    Join Date
    Apr 2005
    Location
    Worcestershire
    Age
    45
    Posts
    2,308
    Quote Originally Posted by Gav View Post
    I thought with PL, i should be able to spin them up and drive straight?
    I would think the opposite, if both wheels are spinning this will allow them to move sideways on the road.

    On an open diff, with only one spinning, the other will try and keep the car in a straight line.

    That's why I've always thought you can't do proper doughnuts unless you have a LSD as the open diff won't allow both wheels to move sideways (as easy).
    Last edited by cperry; 02-03-20 at 08:29 AM.
    Regards

    Craig Perry

    No, I'm not "repairing" it, I'm fine tuning its performance.

  5. #5
    Join Date
    Apr 2012
    Location
    Wrexham
    Age
    48
    Posts
    559
    Quote Originally Posted by aaronjb View Post
    Or one of these (Andy Walsh comes highly recommended): https://www.carlimits.com/script/vie...rfieldtraining
    Thats just what i am after but Essex?? Anything in Wrexham??
    I openly admit i am shit at driving unlike some of you Car Gods lol...
    Have slowly increased limits of car in last 3 years but its a case of handling the car when that line is crossed
    But thanks for replies.
    Regards
    Gav
    AK Ls1/t56
    Body on April 2014
    Passed IVA March 2017
    Registered April 2017.

  6. #6
    Join Date
    Aug 2004
    Location
    Christchurch, NZ
    Age
    59
    Posts
    2,366
    Quote Originally Posted by cperry View Post
    I would think the opposite, if both wheels are spinning this will allow them to move sideways on the road.
    On an open diff, with only one spinning, the other will try and keep the car in a straight line.
    Precisely!
    Cheers

    Myles D-W

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