Hey guys, sorry for posting another "what class am I in?" but I really have searched through many pages on both here, scca's forum and scca time slips and found nothing. I drive an ss/na with a good amount of mods (full bolts on's and some suspension) and can't quite figure out what class I would be in. I know my mods would place me in the Street Touring category, but I'm not sure where to go from there. The SCCA rulebook only lists the ss/tc which is either in D stock or STX. This leads me to believe I would be in STF, the first Street Touring class with the base model Acura RSX. However I have seen a few timeslips of cobalt's (2.2 or 2.4 engine not specified) in the STS (Street Touring Sport). Is there anyone with an SS/NA that has autocrossed before or knows what class one would be in?


Heres a short list the SCCA gives for examples of STF Cars:

Street Touring FWD (STF)
Acura
RSX
TSX
Ford
Fiesta
Focus (all)
Honda
Civic (non-Si) (2006-11)
Civic (all) (2001-05)
CR-Z
Fit
Kia
Forte
Forte Koup
Mazda
236
MINI
Cooper (non-S)
Mitsubishi
Lancer (non-turbo)
Scion
tC
xA
xB
Toyota
Corolla (2003-12)
Yaris
Volkswagen
Golf (2.5L)


Street Touring Sport (STS)
BMW
Z3 (4-cyl)
Honda
CRX
del Sol & Civic del Sol
Mazda
Miata (non-Torsen differential)
(1990-97)
RX-7 (non-turbo, NOC)
Pontiac
Fiero (4-cyl)
Toyota
MR2 (non-supercharged) (1985-
89)
MR2 (non-turbo) (1991-95)


Sorry about the long read and thanks for any help!

 

It all depends on your mods. Just one thing is enough to bump you up to a higher class. Dig into the rule book.

 

All different classes in the Street Touring category are allowed the same mods. The car is the only thing that determines class in a certain category. I know with my mods I am in the Street Touring category but I am not sure what class in Street Touring. STF or STS?

 

I would say then STF, since you have FWD.

 

There are plenty of FWD cars not in the stf class. Anyone else know?

 

Hopefully it would be in STF. I would send a message to Andy Hollis or Hollis racing on facebook and see if he can help you out. He is FWD autocross God.

ST classes just had a bunch of changes, so those STS results you saw were probably from last year or the cars were classes incorrectly. Just a guess, maybe I'm wrong.

 

Yeah that's what I'm hoping too, but I'm not expecting to place well for the first few events just keep improving. But I will look into that, thanks man.

 

You can't depend on the car model as a specific class determination for any other class except stock. It depends on your mods after that.

Do you have a CAI or a drop in? Wider tires? Wider/smaller wheels?

12.3 of the SCCA handbook also states that cars of the same Make/Model with different designations may be assigned to classes identically.

http://scca.cdn.racersites.com/prod/..._Rules_May.pdf

I would scroll to page 71 Section 13 of the SCCA handbook and start making notes of your mods to see where you match up.

 

That would only denote which class for example:

Stock

Street Touring

Street Prepared

Street Modified

Prepared

Modified


I needed to know which section of street touring I'm in:

Street touring compact (STC)

street touring front wheel drive (STF)

street touring sport (STS)

street touring xtreme (STX)


I figured it out though, the novice chair at the event told me that I should be in STF but technically could be in STC so I decided to take the worse PAX to see how well I would actually do.

 

Understood. Mostly all the classes are allotted the same ST modifications, and the biggest difference between them all are mainly LSD, wheel, and tire allotments, which they tel you in the handbook. Like I stated before, if there is no clear verification as to what class your car is in as a whole or it's not outwardly stated, assume it's the same as other designations of the same model of car (SS, LT, LS, etc).

For instance, here are some examples on how the ST classes differ;

Tires may have section widths up to and including the following:
STF, STC, STS, STR (AWD) – 225 mm
STX (AWD), STU (AWD) – 245 mm
STR (2WD) – 255 mm
STX (2WD) – 265 mm
STU (2WD) – 285 mm

Any wheels are allowed with widths up to the following:
STF, STC, STS, STR (AWD) – 7.5”
STX (AWD) – 8.0”
STX (2WD), STR (2WD) – 9.0”
STU – unlimited

STC, STS, STF – No limited slip differentials are permitted except for
factory standard viscous coupler type units.
STX, STU, STR – Only standard (as defined in Section 12.4) limited
slip differentials (LSD) are allowed on AWD vehicles. For AWD
90 — 2012 SCCA® National Solo® Rules
vehicles that did not come with any type of limited slip differential
(including center differential or transfer case), a single aftermarket
LSD may be added. 2WD vehicles may use any LSD unit.

Those are going to be your biggest differences in your ST classes. If you're running stock wheel/tire width with ST allowed mods, with no LSD you're probably in STF.

 

Yeah I got it figured out now, thanks though man

 

I'm full bolt-ons and they put me in SMF

 

You have a tc or sc?

Either one that's completely unfair to the other cars haha

How'd you do?

 

Meh, depends on your region.

When I tried to run in SMF the people running it were all "Uhhh... what tires are you on? If you're on streets, don't bother, everyone in there is on slicks." So I ended up just running in a street tire class.

 

he sucked it up

 

OH ****... I thought you said "STF" not "SMF" hahahah

Now I understand where your coming from. What exactly are street tire classes? I've heard them mentioned before but my region doesn't have them, how do they work?

 

They are pretty much just to get people out there and participating. Instead of having to figure out your class and whatnot, just show up on your normal tries and go at it. So you'll be with all sorts of other cars. The region I ran in just split up the street tires by FWD, RWD, and AWD.

 

Supercharged or turbocharged 2 liter = STX. You're not an STF car if you have an SS.

Scott