patinum

It's the specification of "smaller decrease" that makes it confusing. If you ran 205/225, then your smaller decrease would be 245-225 = +20. if you use 235/255, your "smaller decrease" would be 245-255= -10. But since that is not a decrease per say, you could interpret your "smaller decrease" as 245-235= +10.

FormulaRedline

To answer the weight question, alternative minimum weight is definitely the way to go, as you actually get quite a bit of free removal before you'll hit it (you could easily remove the passenger seat and the plastic trim behind the seats). I also heard a rumor (from a NASA official) that alternative minimum weight may be the the only way to asses points for weight in the near future.

I'll agree with this. If your region has competent TTD drivers, a TTD S2000 is a bad choice. You just don't have enough points to play with compared to some of the other cars in the class.

I think they erred on the conservative side here since no one had run one before. That said, I believe the current rules probably place the CR in a similiar spot in C as the base S2000 in D: it's just not feasible. A TTC built S2000 will have better tires, a better wing, better suspension, more power, and the same weight as a TTC CR.

mxt_77

"the smaller decrease of front or rear for cars using split sizes" means the smaller of 10mm for the front or -10mm for the rear. -10mm is smaller than 10mm, however there are no points assessed for -10mm per the previous part of the rule, therefore there are no points returned.

patinum

Even if the CR were TTC +7, I think it would still be slightly less competitive with other fully prepped TTC S2000's. But I would take it instead of trying to build a fully competitive TTB car and still come nowhere close to winning.

For example:
TTC +7
sway bar +2
235/275 RA1 +9
exhaust +1
=+19

3312DC

I know there was alot of speculating before, but did anyone get an official answer on the exhaust issue?

catback and test pipe are +2, or +3....

modified or deleted OEM catback are +1...

Jaku

i calculated 1 time last week, it's around low 30 points, just wanna double check if i do it right but i didn't know u need to add points for weight

mxt_77

^ Catback & testpipe is +3:
http://www.nasaforums.com/viewtopic....164016#p164016

modified catback is +2.

modified/deleted cat only is +1.

FF2Skip

And this is why you won't see them in Time Trials. They are slightly stiffer. They are only slightly lighter. Since the base class is TTC, a 255 tire can be used without penalty. Since the car comes with a wing, I would try running 255 RA-1's without a fsb and see how it feels. That would leave you in TTC.

FF2Skip

mxt already addressed this. Points are based on your car's base class and the largest/widest tire. I currently have a 235/255 setup, but only because I cannot find two more 17x9 Volks.

patinum

Yeah, I was hoping to have a car that I could use for NASA TT and SCCA Autox, but that doesn't look like it's going to happen.