1. Factory differentials only.
2. MX-5 could prove to be an overdog given the same wheel/tire width (8.5"/245) combo over an S2000. I wouldn't be inclined to exclude the MX-5 but perhaps affording the S2000 wider wheels and/or tires would make this more of a fair fight? Here you have a class that S2000 guys have been clamoring for and now you have the MX-5 (or even MR Spyder perhaps) as the car to beat.
Just trying to gather more food for thought.
TOPEKA, Kan. (My 7, 2009) – Sports Car Club of America’s Solo Events Board has approved a new supplemental class—Street Touring® R (Roadster), for competition in 2010.
The approval comes after considerable member support to expand the ST category to include a class for modern roadsters. While many cars are eligible, member feedback helped establish the Honda S2000 and Mazda Miata as the class’ performance targets. Allowances will be tailored for eligible vehicles to establish performance parity.
The class will have the following requirements and restrictions:
- Two seat sports cars
- Engine displacements up to 2.8-liters
- No forced induction
Eligible vehicles will include, but is not limited to:
- All STS eligible vehicles per the requirements and restrictions, plus
- Honda S2000
- Mazda Miata
- Mazda MX-5 Miata
- Toyota MR2
- Toyota MR2 – Spyder
- BMW Z3 (non M)
- BMW Z4 (non M)
- Mazda RX-7 (non-turbo)
- Porsche Boxster
- Porsche 968
- Porsche 944 (non-turbo)
- Pontiac Solstice
- Saturn Sky
Excluded vehicles due to performance potential:
- Lotus cars
Additional class notes include:
- Tire Allowances:
o AWD – 225mm
o 2WD – 245mm
- Wheel Allowances:
o AWD – 7.5”
o 2WD – 8.5”
- Catalytic Converters:
o Same as ST, STS allowance.
- Limited Slip Differentials:
o STR: Only standard LSDs allowed OR Allowance same as STX, STU
The class will run with supplemental status in 2010, meaning that no National Champion will be crowned. Should the class show considerable interest, and meet participation requirements, it may be approved for full National status in future years.
The SEB is seeking input on the following items. Members should send any input on these items to seb@scca.com.
1. OE LSD vs. Aftermarket LSD: All of the target vehicles are available with Limited Slip Differentials (or electronic equivalents) as standard equipment in some optional configuration. Restricting all cars to OE limited slips would reduce costs. That said, not all factory LSDs are equal and an argument can be made that, for reasons of parity, aftermarket parts should be allowed.
2. Inclusion of 2006-present Mazda MX-5: Is this car appropriate given the desired performance level of the class?
I always hear you, "can't" fit this or that, but quite often it's not nearly as difficult as most make it out to be... I'm not sure what the limiting factors are on an NC (other than the fenders) but don't forget you also don't need full lock on an autox course.
, and could it be competitive?