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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.

1,802 topics in this forum

  1. NASA 2018 ST5 Rules Released 11-29-17

    By Greg G.,
    • 22 replies
    • 9.6k views

  2. NASA TT Classification - How does classing work?

    By weenrock,
    • 1 reply
    • 2.9k views

  3. TTD for 2018

    By lutfy,
    • 3 replies
    • 3.6k views

  4. How prepared are most TT cars?

    By Your_Drunkle,
    • 4 replies
    • 2.6k views

  5. Who’s running TT5 this year?

    By truegearhead,
    • 1 reply
    • 2.6k views

  6. TT5: Hood Venting

    By truegearhead,
    • 4 replies
    • 3.1k views

  7. 2018 PT Rules posted

    By Greg G.,
    • 0 replies
    • 3k views

  8. Anyone else still waiting to get valid working HAWK Codes?

    By CWeber,
    • 9 replies
    • 3.4k views

  9. Application of Min Comp Weight

    By dsc off,
    • 1 reply
    • 2.3k views

  10. 2018 ST/TT Car Classification Form Now Online! - 1-12-18

    By Greg G.,
    • 2 replies
    • 3.2k views

  11. Ballast

    By adprescott,
    • 15 replies
    • 7.1k views

  12. NASA 2018 ST1-4 & SU Rules Released 11-29-17

    By Greg G.,
    • 6 replies
    • 5k views

  13. PTC/TTC & PTD/TTD Update for '18

    By Greg G.,
    • 2 replies
    • 4.9k views

  14. 2nd Track Car Decision

    By Bcoffin23,
    • 4 replies
    • 5.4k views

  15. H4 Setup in Time Trial

    By 10dsbrennan,
    • 1 reply
    • 3.2k views

  16. Proposed changes for '18 for upper level classes

    By Greg G.,
    • 4 replies
    • 4.2k views

  17. Replacement Parts Original vs OEM Replacements

    By rough68fish,
    • 2 replies
    • 3.1k views

  18. S2000 time trial classing?

    By outlawevans,
    • 4 replies
    • 4.4k views

  19. TTC Entries for 2017 Western States Championships

    By djqd36,
    • 1 reply
    • 2.8k views

  20. Bridgestone / Hankook / BFG / Kumho / Dunlop

    By Sissyfoot,
    • 7 replies
    • 5.8k views

  21. Oil Accumulator points?

    By Fr3AkAzOiD,
    • 5 replies
    • 4.9k views

  22. can an 05-07 sti be competitive in tt4?

    By aaronsti,
    • 16 replies
    • 9.1k views

  23. Greg, Can I get a classing for 2017 Mini Cooper S

    By Revolution Mini,
    • 15 replies
    • 9.8k views

  24. rear wing question

    By aaronsti,
    • 0 replies
    • 2.8k views

  25. Pro Challenge for TT4

    By Z06phile,
    • 0 replies
    • 2.7k views
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