The official NASA website is here: http://nasaproracing.com
The class rules are available here:http://www.nasaproracing.com/rules/Super-Touring.pdf
And there's a brief discussion about them on this forum here: http://www.locostusa.com/forums/viewtopic.php?f=38&t=6327
The NASA ST/SU forums are here: http://www.nasaforums.com/viewforum.php?f=18&sid=90bc04403f32e02246a86577d47599e2
And a thread introducing the class is here: http://www.nasaforums.com/viewtopic.php?f=18&t=26396
Per Greg Greenbaum, NASA's Director of ST/SU:
Greg Greenbaum via the NASA Forums wrote:
The "purpose" of the STR classes is to allow a lot of tube-frame cars running with other organizations to now also run with NASA. In addition, you now have two different classes you can run with in NASA (ie, Supersize at the Championships for two Championship races instead of one).
My concern is that a car based on a street vehicle (from a body & aero perspective) could be at a serious disadvantage when confronted with purpose built, single seat sports racers built to the same rules package. It's also worth noting that NASA's aero rules for STR & SU seem to be completely unlimited at this point.
One possibility might be to attempt to become ST classified and just pay a penalty on the car's power to weight ratio. The ST classification rules do list that kit cars may be granted an exception so you might be able to get the LaBalla classed with a mod factor that way. The ST aero rules are still very open but there is one restriction:
2) ST1 and ST2 only (not applicable for STR1 and STR2): Aerodynamic modifications are unrestricted, except that a rear wing (or rear spoiler for wagon-style bodies), may not exceed a height of eight (8) inches above the roofline (or OEM windshield height for convertibles).
And here's more from general info from the ST/SU rules:
7.1.1 ST1 & ST2
Any closed wheel/fendered production vehicle, approved for street use by the D.O.T., T.U.V., or Japanese government, that complies with all NASA safety requirements in the CCR, and all of the restrictions and limitations listed below in 7.2 and 7.3 is eligible to compete based on the “Adjusted” weight/power ratios below:
Super Touring 1 (ST1) = “Adjusted” wt/hp ratio equal to, or greater than, 5.50:1
Super Touring 2 (ST2) = “Adjusted” wt/hp ratio equal to, or greater than, 8.70:1
Performance enhancing modifications are otherwise unlimited. Some kit cars and purpose-built tube-frame or monocoque racecars may be permitted to compete in ST1 and ST2 with the approval of the NASA National Super Touring Director as they present for competition. The National ST Director will determine and publish any additional modification factor(s) for the Adjusted weight/horsepower ratio for those vehicles, as well as any other specific limitations and restrictions placed on those vehicles. Note, the addition of the STR1 and STR2 classes in February of 2009 does not negate or repeal the previous (or future) approvals of the tube-frame and non-production vehicles for ST1 and ST2 listed in Section 8. All of these approvals will be valid at least through the end of the 2009 season. Many (and possibly all) of them, will continue to be valid through the 2010 season and beyond.
7.1.2 STR1 & STR2
Any closed wheel/fendered racecar, that complies with all NASA safety requirements in the CCR, and all of the applicable restrictions and limitations listed below in 7.2 and 7.3 is eligible to compete based on the “Adjusted” weight/power ratios below:
Super Touring R1 (STR1) = “Adjusted” wt/hp ratio equal to, or greater than, 5.50:1
Super Touring R2 (STR2) = “Adjusted” wt/hp ratio equal to, or greater than, 8.70:1
Performance enhancing and chassis/body/aero modifications are otherwise unlimited.