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Thread: tube chassis front strut question

  1. #1
    Junior Member SHOW GUEST
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    Oct 2008
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    tube chassis front strut question

    My first strut car, picked up as a roller, Passenger side strut spring is lower than drivers (and softer), shouldn't the springs on both sides be the same height from the bottom of the strut? Drivers side is very stiff also. previous owner says all was well when he ran 8.40's but not sure if I trust him.

  2. #2
    Senior Member DYNO OPERATOR
    Join Date
    Apr 2008
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    504
    Your description means that you have preload in the driver side. You are looking at the movable part of the spring perch. I always run them exactly the same in front and usually in the rear as well. Someone may have been trying to get preload in the suspension with the front springs. I would not recommend doing it that way. The accepted method in tube cars is to get your preload with the rear suspension. The driver side will be lower to the ground with positive preload. Your previous owner may have tried to preload without changing the rear suspension? I would put the springs in the same position on both sides and be sure that you have 1/2" of shock still available at race weight for bump travel before the rubber snuber begins to hit. You will likely need to check the rear preload after setting the springs in the correct settings so you know where you are.
    Bruce

  3. #3
    Junior Member SHOW GUEST
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    thanks, that is what Strange, Chassis works, and other strut suppliers said, makes sence to me. Im not sure yet if they are 3" or 4" struts, you think 1/2" is enough for a 4" strut?

  4. #4
    Junior Member SHOW GUEST
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    Bruce, maybe "thanks" isn't good enough, I really appreciate the reply, It really helps when someone with experience is kind enough to share his time and knowledge to help someone out. I've googled for 2 days and couldn't get that information from anyone running struts.

    Thanks again,
    robert

  5. #5
    Senior Member DYNO OPERATOR
    Join Date
    Apr 2008
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    You are welcome Robert. You can run between 1/2" and 3/4" showing on the front shocks for bump travel regardless of front shock travel. The rears, it depends on how long the travel is in them, the front are always set to .5 to .75" when best. After pre-loading the chassis from neutral your suspension and shock tops will be at different heights, and that is normal FYI. Have fun with your new car Robert, adjusting them is 1/2 the fun of racing for some of us.
    Bruce


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