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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. Team Entry

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  2. 2015+ Mustang

    • 19 replies
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  3. Classification (for micro sprint car)

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  4. Audi S3 Base Class Request

    • 3 replies
    • 4k views
  5. Downclassing with narrow tires?

    • 4 replies
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  6. Wheel and tire size recommendation for E90 M3

    • 1 reply
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  7. Change final drive gearing

    • 7 replies
    • 4.3k views
  8. Dyno reclass? 1 2 3

    • 61 replies
    • 20.2k views
  9. TT Roll cage question

    • 3 replies
    • 4k views
  10. Licensing

    • 4 replies
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  11. Fuel Lines?

    • 2 replies
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  12. Counterfeit Simpson tethers

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  13. out of spec, spec miata heads

    • 3 replies
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    • 4 replies
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  14. 2015 Proposed Tire Rules (TTB-TTF) 1 2 3 4 5

    • 114 replies
    • 41k views
  15. Hoosier A7s 1 2 3 4

    • 75 replies
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  16. OEM hardtop rule (s2000)

    • 15 replies
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  17. 2015 TT Rules On-line

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  18. 2015 rules/car classifications …

    • 3 replies
    • 3.5k views
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