I hope they include the NC.
The SEB has approved a new supplemental class as recommended by the STAC, to be added to Appendix A as “Supplemental
Street Touring Class 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 are 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 (removed)
- Porsche 944 non-turbo
- Pontiac Solstice
- Saturn Sky
Excluded vehicles due to performance potential:
- Lotus cars
Additional class notes include:
- Tire Allowances (add to 14.3):
- AWD – 225mm
- 2WD – 245mm
- Wheel Allowances (add to 14.4):
- AWD – 7.5”
- 2WD – 8.5”
- Catalytic Converters (add to 14.10.E):
- Same as ST, STS allowance.
- Limited Slip Differentials (add to 14.10.K):
- 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 [email protected].
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
SCCA Fastrack News June 2009 Page 22
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?
http://www.scca.com/documents/Fastra...-june-solo.pdf
If they include the NC, it will probably become the car to have for the class. It is the lightest and best developed chassis that can run the maximum tire size.
Ironically, a bone stock S2000 CR would be illegal for the class, since the car comes with 255/40-17 rear tires.
Iain
"We don't stop playing because we grow old, we grow old because we stop playing." - George Bernard Shaw
I agree that the NC will be a great car for this class. A good 245 street tire is a lot of grip for this car and with a modified suspension you get rid of the big problems that the stock NC had.
Ironically, nobody forces a CR driver to run 255 tires on the back of the car. A bone stock CR already has a place to play, ask Mr. Maxcy he won the Houston tour in one (great driving Stu!!!). After driving a few well prepped S2000s I think They shouldn't have a problem keeping up with the NC. You just need a very good driver.
Thomas
V-to-the-Dub
I think the 2003 Club Sport Miata will actually be the car to have. The ST allowances improve the power a lot, it's fairly light weight in places that aren't touched by the ST rules and will take a fairly wide tire with a legal fender roll.
I'm not sure that the Club Sport will be any more of a threat in STR than it was in C Stock. I'm not even sure why it would be a better choice than a '99 Sport or PEP.
I'm pretty sure a 2003 Club Sport is still heavier than a minimum option '99 Sport, even with the soft top delete. The '99 Sport has the same fender clearance as a Club Sport and a better engine (no VVTi).
The biggest problem with the NB chassis is going to be the inability to fit 245 tires with the right rolling diameter. Now if Bridgestone or someone decides to offer a 245/35-15, all bets are out the window, but I'll take an NC on 245s over an NB on 225s. I also think the NC will have better power/weight and torque/weight ratios than an NB when fully developed for the class, and there's no question that the NC has better brakes.
Last edited by altiain; 05-29-2009 at 01:37 PM.
Iain
"We don't stop playing because we grow old, we grow old because we stop playing." - George Bernard Shaw
This sounds like a fun class.
"Racing makes heroin addiction look like a vague longing for something salty" - Peter Egan
Yay, I can run my miata in STR instead of CSP now!
Not that it matters with the preps on my car.....
94 Miata R package RPF1 195 RS-R RB FSB FCM Bilstein Ebay Coilover 550/350
91 Civic Si Daily Beater
"Its more fun to drive a slow car fast, than it is to drive a fast car slowly".
I'm with Iain on this other than the '99 sport engine. It's going to be a matter of time before the Megasquirt guys are able to control the VVTi and they are already fitting them in 90-93 ECU boxes. The higher compression and VVTI (once controlled) will be an advantage over the better head design of the '99-00 sport. Guess what engine the top CSP guys are using.
The extra torque, bigger tires, better brakes and ABS will definitely override the weight advantage of the NB. Non prepped NCs are probably around 2400 even and they will definitely save some weight in STR trim.
Thomas
V-to-the-Dub
I think it will be a NC, S2000 battle.
VW Bug in running shoes
M Porcupine sedan
M Porcupine coupe
Crusty old e46 beater
Battery Powered appliance car
"That which does not kill us, just makes us madder"
Cletus Nietzsche (Friedrich's half-brother on his sister's side)
Yup. The way I read that, the 2.7L Cayman is eligible for the class. The only specifically excluded vehicle is the Elise/Exige.
Iain
"We don't stop playing because we grow old, we grow old because we stop playing." - George Bernard Shaw
Looks like the NCs are in and 255 tires on 9in. wheels. Also the 350Z and after market diffs.
I wounder how much tire you can get under an MR2 Spider? 2195 lbs. stock!
Last edited by Robert; 07-20-2009 at 05:01 PM.