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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. TT4 Chassis mount rear wing allowed?

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  2. 2021 TT Form Submission

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  3. ST5 Mod Factor Questions

    • 4 replies
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  4. NORCAL : ST4 owner of a Bodyshop

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  5. 2021 Rules Time--How about no changes?

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  6. TT6 Aerodynamic Modifications

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  7. TT Car Classification

    • 2 replies
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  8. starting a build for an e30 in TT

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  9. TT3 Rear Diffuser Question

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    • 1.3k views
  10. Spec Miata Time Trial Classing, TT6?

    • 3 replies
    • 1.4k views
  11. Active Aero in TT

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  12. Which Tires are DOT R-comp Autocross?

    • 2 replies
    • 1.1k views
  13. Number and classification marking size

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    • 966 views
  14. 2020 ST/TT Car Classification Form

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  15. 2020 Form Submissions

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  16. Non-Compliant Cage vs No Cage - TT

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  17. TT5-6 Track Width Rule 6.1.9.8

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  18. Clarification of rules for TT/ST6

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