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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.

1753 topics in this forum

  1. 2022 ST/TT Car Classification Form is Live

    By Roman V.,
    • 0 replies
    • 138 views

  2. 2022 TT Rules Release Today

    By Greg G.,
    • 5 replies
    • 843 views

  3. 2021 ST/TT Car Classification Form

    By Roman V.,
    • 1 reply
    • 1.8k views

  4. Technical Bulletin: Goodyear DOT Radial RCMD - Provisional Classing as "Autocross" for ST4-6-- 6-10-21

    By Greg G.,
    • 0 replies
    • 1.5k views

  5. AVG HP Calculator Instructions

    By Roman V.,
    • 0 replies
    • 2.6k views

  6. Can I Take My Convertible Vehicle on a Race Track in HPDE or Time Trial Groups?

    By Roman V.,
    • 0 replies
    • 2k views

  7. How To - ST/TT Submission - Edit Link Request

    By Roman V.,
    • 0 replies
    • 2.3k views

  8. NASA TT Event Schedule

    By Greg G.,
    • 0 replies
    • 7.6k views

  9. Links:TT License Application,Classification Forms,Rules,more

    By Greg G.,
    • 6 replies
    • 21.4k views

  10. Regional TT Director List--updated 11-10-21

    By Greg G.,
    • 0 replies
    • 17.6k views

  11. 2022 TT5/6 Scion FRS Build

    By TT686,
    • 3 replies
    • 44 views

  12. Transmission Rule Clarification

    By yuba,
    • 3 replies
    • 103 views

  13. Transmission Tunnel Modification Clarification

    By weenrock,
    • 2 replies
    • 63 views

  14. Should an aftermarket subframe really get forced into tt3+

    By Scott Johnston,
    • 2 replies
    • 183 views

  15. Baby Grand

    By Joey23,
    • 1 reply
    • 69 views

  16. 2022 ST/TT Car Classification Calculator

    By Roman V.,
    • 0 replies
    • 141 views

  17. Rule Clarification ?

    By Brian Clarke,
    • 1 reply
    • 189 views

  18. #66 driver (white cayman s / gulf radical sr3) — looking for contacts

    By b1gstuff,
    • 1 reply
    • 230 views

  19. 2022 Rule Change Suggestion - Consolidation of Classes

    By MemphisRob,
    • 13 replies
    • 719 views

  20. Looking for the white 981 cayman driver (TTU)

    By b1gstuff,
    • 0 replies
    • 134 views

  21. TT/ST Hit for Transmissions - Revision Needed

    By Brian Clarke,
    • 7 replies
    • 505 views

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

    By kayha12,
    • 11 replies
    • 435 views

  23. Tire size question for TT4

    By BabyFerrariRacing,
    • 6 replies
    • 1.2k views

  24. 2022 Rule Changes

    By 243R,
    • 1 reply
    • 272 views

  25. TT4 questions for a 1998 Mustang GT

    By Depaja,
    • 2 replies
    • 164 views
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