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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.

1,798 topics in this forum

  1. Who’s running TT5 this year?

    By truegearhead,
    • 1 reply
    • 2.5k views

  2. TT5: Hood Venting

    By truegearhead,
    • 4 replies
    • 3k views

  3. 2018 PT Rules posted

    By Greg G.,
    • 0 replies
    • 2.9k views

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

    By CWeber,
    • 9 replies
    • 3.4k views

  5. Application of Min Comp Weight

    By dsc off,
    • 1 reply
    • 2.3k views

  6. 2018 ST/TT Car Classification Form Now Online! - 1-12-18

    By Greg G.,
    • 2 replies
    • 3.1k views

  7. Ballast

    By adprescott,
    • 15 replies
    • 7k views

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

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

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

    By Greg G.,
    • 2 replies
    • 4.8k views

  10. 2nd Track Car Decision

    By Bcoffin23,
    • 4 replies
    • 5.3k views

  11. H4 Setup in Time Trial

    By 10dsbrennan,
    • 1 reply
    • 3.1k views

  12. Proposed changes for '18 for upper level classes

    By Greg G.,
    • 4 replies
    • 4.1k views

  13. Replacement Parts Original vs OEM Replacements

    By rough68fish,
    • 2 replies
    • 3k views

  14. S2000 time trial classing?

    By outlawevans,
    • 4 replies
    • 4.3k views

  15. TTC Entries for 2017 Western States Championships

    By djqd36,
    • 1 reply
    • 2.7k views

  16. Bridgestone / Hankook / BFG / Kumho / Dunlop

    By Sissyfoot,
    • 7 replies
    • 5.7k views

  17. Oil Accumulator points?

    By Fr3AkAzOiD,
    • 5 replies
    • 4.9k views

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

    By aaronsti,
    • 16 replies
    • 9k views

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

    By Revolution Mini,
    • 15 replies
    • 9.7k views

  20. rear wing question

    By aaronsti,
    • 0 replies
    • 2.8k views

  21. Pro Challenge for TT4

    By Z06phile,
    • 0 replies
    • 2.7k views

  22. newbie - new car decision

    By thibbert,
    • 1 reply
    • 3.6k views

  23. Fire Safety

    By Marshall M.,
    • 1 reply
    • 3.6k views

  24. question about modification factor

    By aaronsti,
    • 1 reply
    • 3.1k views

  25. HPDE to TT - B16 CRX & Other Hondas

    By ZeroForceMember,
    • 5 replies
    • 4.3k views
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