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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.


1,795 topics in this forum

  1. 2022 TT Rules Release Today

    • 8 replies
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  2. Transmission Rule Clarification

    • 3 replies
    • 526 views
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    • 786 views
  3. Baby Grand

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    • 511 views
    • 0 replies
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  4. 2022 ST/TT Car Classification Calculator

    • 0 replies
    • 625 views
  5. 2021 ST/TT Car Classification Form

    • 1 reply
    • 2.4k views
  6. Rule Clarification ?

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  7. Tire Size (section width) +/- PWR Review

    • 11 replies
    • 920 views
  8. Tire size question for TT4

    • 6 replies
    • 1.9k views
  9. 2022 Rule Changes

    • 1 reply
    • 620 views
  10. TT4 questions for a 1998 Mustang GT

    • 2 replies
    • 520 views
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  11. Mazda Miata Floor Pan

    • 3 replies
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  12. How competitive is the ND2 Miata in TT5?

    • 4 replies
    • 1.2k views
  13. Kinda lost in the rules

    • 5 replies
    • 1k views
    • 38 replies
    • 14.8k views
  14. TT4 Chassis mount rear wing allowed?

    • 3 replies
    • 1k views
  15. 2021 TT Form Submission

    • 1 reply
    • 809 views
  16. ST5 Mod Factor Questions

    • 4 replies
    • 1.1k views
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