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Thread: Lr stack rates

  1. #1

    Default Lr stack rates

    Anybody have any experience with stack springs on the left rear when a heavier driver is in a car? Chassis builders basic setup sheet calls for a 75# spring preloaded 1.5 inches at full droop (112.5 lbs). But when utilizing this set up and driver climbs in car it causes car to lose bar angle making car lazy on restarts Went to a 125 spring and car seems to be more predictable and fire better on restarts. I only preloaded this spring about a half inch. Should I set preload to get close to the 112.5 lbs or try to come up with some kind of stack setup? I have a spring smasher but car builder says to use the preload method to set the left rear. Thanks in advance guys

  2. #2
    Join Date
    May 2007
    Location
    Batavia, OH
    Posts
    13,615

    Default

    Quote Originally Posted by doyle hargraves View Post
    Anybody have any experience with stack springs on the left rear when a heavier driver is in a car? Chassis builders basic setup sheet calls for a 75# spring preloaded 1.5 inches at full droop (112.5 lbs). But when utilizing this set up and driver climbs in car it causes car to lose bar angle making car lazy on restarts Went to a 125 spring and car seems to be more predictable and fire better on restarts. I only preloaded this spring about a half inch. Should I set preload to get close to the 112.5 lbs or try to come up with some kind of stack setup? I have a spring smasher but car builder says to use the preload method to set the left rear. Thanks in advance guys
    Just prop it up with a bumpstop. Don't overthink it.
    Modern Day Wedge Racing
    Florence -1

  3. #3
    Join Date
    Feb 2013
    Posts
    413

    Default

    I can tell you this much them fat boys win races no bs!!!!!!!!

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