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Rules/Classification

Time Trial Rules - The latest rules on the NASA Site.

Time Trial Car Classification Form TTA-TTF

Time Trial Car Classification Form TTS/TTU/TTR

Time Trial License Application

Time Trial/HPDE Car Tech Form

Online Classifier--Temporarily Off-line.  The Classer is getting updated for the '08 Rules.  For assistance in classing, contact your Regional TT Director by e-mail.

Important Note: For in depth rules for HPDE participation please download the Club Codes and Regulations (CCRs) to get specifications on racing harnesses, seats, roll bar, and other safety related items. As a general rule, an "unmodified" factory vehicle will pass tech without any problems, but cars that have been modified (seats, roll bars, belts, etc) must conform to the preparation rules listed in the rulebook.





Rule Addendums and Clarifications Read More...



Provisional TT Classifications Read More...



NASA TT Approved Motor Swaps Read More...