Rules/ClassificationDyno Re-classing for Motor Swaps, Aftermarket Heads, Aftermarket/Modified Forced Induction, Ported Rotaries, and others requested Read More...
Provisional TT Classifications Read More...
Rule Addendums and Clarifications Read More...
Time Trial Rules - The latest rules on the NASA Site.
Time Trial Car Classification Form TTB-TTF
Time Trial Car Classification Form TTU/TT1/TT2/TT3
Time Trial Dyno Certification Form (ST/PT/TT Dyno Certification Form)
Time Trial License Application
Time Trial License Renewal--sign on to the NASA main website
Time Trial/HPDE Car Tech Form
NASA TT Class Calculator tools (Download the Excel file, and click the enable editing button at the top. Then enter your vehicle's data):
NASA TTU,1,2,3 Class Calculator Tool
NASA TTB-F Class Calculator Tool
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.