Autocross classification

[mangojuice]

Running the M4 this year at local autocross wanted to make sure I got the right class based on mods, I’m thinking maybe street prepared but don’t mind maybe doing street modified as catch all since I’m not 100% sure:

- full exhaust including DP
- camber plates
- coilovers
- tune (can tune back to stock if need be)
- aftermarket 18” wheels that run 275 (front), 295 (rear)
- misc aero parts: front lip splitter, side skirt extensions, rear diffuser, lip spoiler

[F80Speed77]

Here are your options

STU - You would need to take rear tire size down to a 285 since that is the current max width and you would also need to be on a 200TW tire. As long as your misc aero parts are factory like you can run them here too. The car is only legal for local events currently in this class aka you can't run it here at SCCA National Tour Events. That may change in 2020 maybe. I would really recommend getting it to fit this class.

ASP - You can definitely run it here too and Hoosiers are allowed.

SM - Same deal

Also SCCA National office created a new XSA and XSB class this year which is an essentially open rule set but on 200TW.

[Kelse92]

I'm going to echo the above comment,

f8x are not currently classed in STU, only e9x and e46. However, there is a rule change proposal out for comment currently on this with SCCA but would not go into effect until the following year.
However, most locals should be fine with it. I believe there are a few who do this in Colorado region events. OP, ask the local registration chair and other attendees in the class if they are fine with running in their class, mods are pretty much all class-legal outside of the aero bits, but I wouldn't worry about taking those off unless you run a national event or if they are factory parts.

ASP, not competitive unless OP wants to run Hoosiers.

XSA would be where it would really fit at this time, but PAX is super difficult so just don't go in expecting to do super well pax-wise. If you're a novice, go and just have fun!

[mangojuice]

Not running competitively but just for fun to get a handle on how far I can push it... wanted to see what class I fit with current mods not other way around

[Kung Fu English]

Originally Posted by mangojuice

Running the M4 this year at local autocross wanted to make sure I got the right class based on mods, I’m thinking maybe street prepared but don’t mind maybe doing street modified as catch all since I’m not 100% sure:

- full exhaust including DP
- camber plates
- coilovers
- tune (can tune back to stock if need be)
- aftermarket 18” wheels that run 275 (front), 295 (rear)
- misc aero parts: front lip splitter, side skirt extensions, rear diffuser, lip spoiler

Originally Posted by F80Speed77

Here are your options

STU - You would need to take rear tire size down to a 285 since that is the current max width and you would also need to be on a 200TW tire. As long as your misc aero parts are factory like you can run them here too. The car is only legal for local events currently in this class aka you can't run it here at SCCA National Tour Events. That may change in 2020 maybe. I would really recommend getting it to fit this class.

ASP - You can definitely run it here too and Hoosiers are allowed.

SM - Same deal

Also SCCA National office created a new XSA and XSB class this year which is an essentially open rule set but on 200TW.

Run OEM size A052 (255/40/18 F + 275/40/18 R) and run STU. That's your best option I think.

[The Choosey begger]

Originally Posted by Kelse92

I'm going to echo the above comment,

f8x are not currently classed in STU, only e9x and e46. However, there is a rule change proposal out for comment currently on this with SCCA but would not go into effect until the following year.
However, most locals should be fine with it. I believe there are a few who do this in Colorado region events. OP, ask the local registration chair and other attendees in the class if they are fine with running in their class, mods are pretty much all class-legal outside of the aero bits, but I wouldn't worry about taking those off unless you run a national event or if they are factory parts.

ASP, not competitive unless OP wants to run Hoosiers.

XSA would be where it would really fit at this time, but PAX is super difficult so just don't go in expecting to do super well pax-wise. If you're a novice, go and just have fun!

Calculator racer!

[Kelse92]

Originally Posted by anglo

Calculator racer!

LOL just calling it like it is!
Have a few friends that run XSA cause their cars are really TT cars or whatever and they just autox to brush up in their car control skills, and it sucks to see them nearly raw-time everyone and still end up like 20th in the overall results

[F80Speed77]

Looks more and more like the F80/82/87 are getting added to STU next year and there might be allowances for things like charge pipes, TCU tunes, and wider tires (295's) too.

[Ummpwr]

Does anyone know if F82s are now legal in STU?

[Theruleslawyer]

Originally Posted by Ummpwr

Does anyone know if F82s are now legal in STU?

Sst I think. New class this year.

[Ummpwr]

dang SST has a much harder pax than STU. Seems like if you are on 200tw tires its BS to SST or XSA?

Thanks, Eric

[Theruleslawyer]

Originally Posted by Ummpwr

dang SST has a much harder pax than STU. Seems like if you are on 200tw tires its BS to SST or XSA?

Thanks, Eric

Yah, I don't think it'll be competitive in SST. I wish you could just stick with the tire restrictions in stu.