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  • #1

    classification help

    I believe I have finally convinced a friend to come give autocross a try and need a little help classing his car. It is a 2000 BMW Z3 M Coupe. The car is eligible for STR, but he has replaced his front rotors with an aftermarket floating type so I think he may end up in BSP.

    ST rules for brakes say:
    "Cross drilled and/or slotted brake rotors may be fitted (same size/type/material as standard) provided all such voids are within the disc area, and comprise no more than 10% of that area."

    SP rules say:
    "Alternate brake rotors are permitted, subject to the following restrictions:
    1. Rotors must be ferrous metal except for standard parts. Aluminum rotor hats are allowed. Rotor dimensions (diameter and thickness) must be equal to or greater than standard parts. Cars originally equipped with solid (non-vented) rotors may utilize vented rotors.
    2. Cross-drilled and/or slotted brake rotors may be used. Slots/holes are permitted only in the braking area of the rotor. Rotors featuring a drum-type parking brake in the hat area of the rotor may not be drilled or slotted in the parking brake area."

    Whaddya think?

    Thanks!
    Rod H
    Bringing a knife to a gun fight.
    Tags: None
  • #2
    Sounds like SP to me.
    Darryl E.
    Blue Miata with ricer stickers.
    Wizzer Motorsports

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    • #3
      yup, those rotors def. moved him up. I would considering going back to oem size, just b/c I'd rather be at the top of a lower class than the bottom of a higher one.
      Jeremiah Hodgins
      99 BMW M3
      Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car.
      Horsepower is how fast you hit the wall and torque is how far you take the wall with you.

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      • #4
        Thanks guys.

        I told him he needed to go back to stock so I could thrash him in STR

        He has done several track days in the M Coupe and had brake issues which led him to the floating rotors. I doubt he would be open to going back.
        Rod H
        Bringing a knife to a gun fight.

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        • #5
          I'd probably let him run in STR if everyone else in class has no objections.I doubt he will get any braking advantage on that gravel surface
          Bill Clinton "It depends on what the meaning of the word 'is' is."

          "Irony can be pretty ironic sometimes!"

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          • #6
            And if he's new to autocross, it's not going to make any difference whatsoever.
            M. Cholewa

            Because they heard I liked my name, so they put my name as my name so I could have my name in my name... all the time.

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            • #7
              I recommended that he run in novice to take advantage of C & Sara's wisdom/course walk and the ride along before his first run.
              Rod H
              Bringing a knife to a gun fight.

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