NASA Time Trial  (NASA TT) is a national auto competition program, utilizing regional series based on a time trial style format, with rules that establish car classifications to provide a contest of driver skill. NASA TT is designed to bridge the gap between NASA HPDE (High Performance Driving Events), and wheel-to-wheel racing.  In most regions, we provide awards on a daily basis, and both awards and sponsor provided prizes on an annual basis for competition winners.

NASA TT provides a venue for spirited on-track competition with a high degree of both safety and convenience. NASA TT competition will take place either in separate TT run groups or in combined HPDE4/TT run groups, depending on the event schedule and number of participants.  In addition to having a set of National NASA TT Rules, the rules, safety guidelines, and driving requirements of the HPDE-4 program apply to NASA TT. These rules can be found in the NASA CCR (Club Codes and Regs).

The best part about the NASA TT series is that any closed-wheel street or racecar can be used to compete in this series. Each car gets placed into one of the nine NASA TT classes. We start with our completely unlimited class, TTU, followed by three semi-unlimited classes, TT1, TT2, and TT3, where classing is based on an “Adjusted Weight/Power Ratio” that is determined by chassis dynamometer testing of the vehicle, vehicle weight, and other Modification Factors that adjust the ratio. For cars in classes TTB to TTF, classification begins with an assignment of a base class determined by the car’s original year, make, model, and equipment level specifications. Modification Points are then assessed for any factory options or modifications done to the car, and after reaching 20, 40, 60, 80, or 100 modification points, the car is up-classed by one, two, three, four, or five classes, respectively.  We have a computer program tool to help you determine your car classification here: TT Classer Program.   Cars in all classes may use non-DOT-approved racing tires, but will be assessed Modification Points in TTB-TTF, and a Modification Factor in TT1, TT2, and TT3.  NASA TT is a contest between drivers competing in a particular class; therefore, a driver may change or substitute a vehicle for one in the same class, and continue to accrue points toward the championship series for the season.  We also have provisions in the rules for drivers that wish to compete together as teams.

TT drivers will generally have four 20-25 minute open passing run sessions at each event (although at times there are five sessions).  Since an “event” is defined as a single day of regional competition, a typical NASA weekend is comprised of two events.  NASA TT competitors will be timed during each run session, and the fastest lap times of the day will be used to determine the winner of each class (The first session of the weekend is generally a warm-up session that does not count toward competition). Championship series points will be assigned to all competitors, and daily awards (medals, trophies, or certificates, etc.) will be given up to third place.

NASA TT competitors receive points in their respective TT class within the region sanctioning the NASA TT event they are competing in. Certain multi-region events will be designated as “crossover events”, and the points earned by a driver at such an event will transfer to his or her respective home region’s championship series. However, a driver may also choose to simultaneously compete in more than one region’s championship series.  In that case, crossover event points will be applied to both series.  A driver must participate in a minimum number of event days to be eligible for championship series trophies, awards, or prizes at the end of the year (as determined by your region).  The points from every driver’s lowest events of the year will be dropped (number of event drop days will be determined by your region, and includes events that the driver was not present at).  Every year, there are two national Championship events, the NASA Western States Championships and NASA Eastern States Championships. They take place at various tracks across the country.  The eligibility requirement for the NASA Championships is that a driver must compete in at least 4 regional TT events.  Obtaining a certain minimum level of placing is not necessary.

Anyone wishing to enter a NASA sanctioned TT Series must meet the following requirements:

• Be at least 18 years old (16 or over with parental consent—see CCR section 3.5) • Hold a current valid state driver’s license—see CCR section 3.5 for minors.

• Have use of an automobile that meets NASA’s technical requirements (CCR 11.4) • Hold a current membership with NASA or a NASA sanctioned car club. (NASA Membership)

• Have proper safety equipment, as per the CCR (Section 11.3—primarily an M95 or better helmet. The       equipment requirements are no different than in HPDE.)

• Roll bar for all Convertibles. (Roll Bar Info) (CCR Section 11.4.7)

• Fully pay all applicable fees.

• Have no outstanding debts with NASA or NASA’s affiliates.

• Have knowledge of all of the rules found in the NASA National Time Trial rules  and Club Codes and Regulations, and fully agree to abide by them.

• All drivers must be deemed physically fit by their physician to participate in a high stress and physically     demanding sport such as auto racing (although a medical form is not required).

• Submit a signed waiver at each event (usually at the track gate upon arrival).

• Must be qualified to drive in the advanced, open-passing, HPDE-4 Group. Entrants will be screened by the TT Director to ensure compliance.

• Entrant must get their car tech. inspected before going on track (Tech Sheets).

• Entrant must fill out the NASA TT Classification Form (TTB-TTF) or NASA TT Classification Form (TT1/TT2/TT3) before beginning competition.

Eligible drivers must complete a NASA TT License Application, and bring it to their first event (unless they have a NASA Competition Race License, in which case a TT License is not necessary).  The Regional TT Director will sign the application after the driver successfully completes the first event if he approves the driver for a National TT License.  The driver can then send the application and $10 to NASA to receive a TT License and be eligible for further TT competition in any region and at the NASA Championships.

All entered vehicles must be in good condition and appearance and must display a three-digit number on both sides of the car (10-inches high), and the rear of the car (4-inches high). Permanent NASA TT car numbers (1-3 digits) may be assigned by your Regional TT Director.  All TT cars must also display a class designation on both sides and the rear of the car (4 inches high). Class designations shall be “TT” followed by the class number or letter.  For example, an “B” Group competitor would display “TTB” as a class designation.

Please contact your Regional TT Director if you desire to compete, or if you just have questions.  You can find your Regional Director’s contact form through the Contact button above, under Contact Us. You can also contact our National TT Director, Greg Greenbaum, on the same Contact Us page if you have national issues.  We have a great group of drivers, and although the majority of us are pretty competitive, our main goal is to have fun.  We often pit in the same area of the paddock, help each other out, and meet for Saturday dinner.  Whether you are new to competition, a current racer, or someone who has years of racing experience that wants a lower stress level competition, we have something for you.

Greg G.—NASA National TT Director