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Time Trial

NASA TT utilizes a car classification system that is easy to understand, and gives HPDE 4 drivers a taste of competition by allowing them to compete for top lap times, in advanced, open passing run sessions, against similarly prepared cars for awards, prizes, and recognition.


1,805 topics in this forum

  1. Ballast Limits

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  2. TT/ST Hit for Transmissions - Revision Needed

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  3. REGIONAL AWARDS

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  4. GR86 ST5?

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  5. 2022 TT Rules Release Today

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  6. Transmission Rule Clarification

    • 3 replies
    • 669 views
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    • 1.2k views
  7. Baby Grand

    • 1 reply
    • 708 views
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  8. 2022 ST/TT Car Classification Calculator

    • 0 replies
    • 771 views
  9. 2021 ST/TT Car Classification Form

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  10. Rule Clarification ?

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    • 1 reply
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  11. Tire Size (section width) +/- PWR Review

    • 11 replies
    • 1.1k views
  12. Tire size question for TT4

    • 6 replies
    • 2.1k views
  13. 2022 Rule Changes

    • 1 reply
    • 743 views
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