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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.


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  1. AVG HP Calculator Instructions

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  2. NASA TT Event Schedule

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  3. Regional TT Director List--updated 4-2-24

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  4. NEW TOYO R Classification.

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  5. 2024 rule proposal: force slow cars out of TTU

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  6. Nationals, Fire systems required?

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  7. 5-point harness

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  8. 2022 TT5/6 Scion FRS Build

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  9. National ECU Question.

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  10. Looking towards 2024..

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  11. ST5/6 Rule change

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  12. Dyno Cert Question

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  13. Dyno clarification

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