Super Touring and Time Trial Classes Get 2019 Rule Updates

New rules in govern the height of hood vents in ST3 through ST6 and TT3 through TT6 classes.

Super Touring and Time Trial National Director Greg Greenbaum released in late April an update for Super Touring and Time Trial class rules. There are also a number of reminders listed below.

Please be sure your ST and TT cars are in compliance with these new rules, especially at the upcoming NASA Championships at Mid-Ohio Sports Car Course.

  1. All Electric Vehicles are only eligible to compete in SU/TTU.  NASA testing and research is ongoing, with the expectation that eligibility and rules regarding EVs for ST1-6 will occur in 2020.
  2. All Hybrid internal combustion/electric vehicles must be approved by the National ST Director for ST1-6/TT1-6.
  3. All non-subframe/non-suspension cross-members (other than the rear frame cross beam) may be modified.
  4. Strut tower bar(s) addition is specifically permitted.
  5. Modification of the rocker panels for jacking point reinforcement is permitted.
  6. Reminder that the HP number listed on the Car Classification Form can and should be higher than the measured Avg HP found in pre-competition Dyno testing.  Competitors should optimize their listed weight and Avg HP on the Car Classification Form so they end up with an Adjusted Wt/HP Ratio at the limit for the class, leaving as much room as possible for both Dyno variance and weight.
  7. Only one Car Classification Form should be uploaded in the ST/TT Form database at a time for each car in each class.  Use the edit function to make changes.  Don’t re-upload a new form.
  8. Effective July 1, 2019: No changes may be made to the ST Car Classification Form or to the vehicle that would affect the Form after the first Qualifying competition session for the remainder of the event without the approval of the Race Director. Any approved changes will result in the vehicle moving to the back of its class (or back of the field if not gridded by class) on the pre-grid for the next race. It is at the discretion of the Race Director whether a grid position change penalty will apply if the changes are approved after a race, but before the next Qualifying competition session. Note, specifically, this rule will deter most tire type/size and weight changes once competition has started. (NASA is moving in the direction of technical inspection digital and barcode identification and verification, and any changes made after competition begins will hamper this effort.)
  9. Reminder and clarification that failing to meet the declared Minimum Competition Weight listed on the Form will result in a DQ.
  10. Reminder that failing a Dyno test by going over the number listed on the Form by any amount (regardless of the measure Adjusted Wt/HP Ratio), is a Procedural Violation with resulting penalties (not a full DQ).

ST1-3/TT1-3

  1. ST3 BTM Aero—Hood Vent lips/louvers/vent insert mounting hardware must not protrude more than 3/8” from the hood surface.

ST4/TT4

  1. Conversion from coil spring to coilover shock spring configuration is permitted.
  2. ST4 Aero — Hood Vent lips/louvers/vent insert mounting hardware must not protrude more than 3/8” from the hood surface.
  3. Front Splitter maximum thickness is 3/4”.
  4. Rear wing end plates maximum size changed to 144 square inches.

ST5-6/TT5-6

  1. ST5-6 Aero — Hood Vent lips/louvers/vent insert mounting hardware must not protrude more than 3/8” from the hood surface.
  2. Front Splitter maximum thickness is 3/4”.
  3. Rear wing end plates maximum size changed to 144 square inches.
  4. Final drive gears in FWD and “transaxle” vehicles are unlimited.
  5. Subframe connectors beneath the floor are permitted with the addition of a torque arm.
Image courtesy of Brett Becker
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