2021 STU Discussion
Jan 13, 2022, 07:07 PM
#212
Evolving Member
Jan 14, 2022, 05:21 AM
#213
Here's the OLD SCCA wording for STU:
Non-standard brake rotors may be used provided they
are of equal or larger dimensions (diameter and thickness) and made
of ferrous material (e.g. iron). Thickness includes the individual plates
of a vented rotor, as well as the overall dimension.
For 2021 - Now the rules only talk about diameter and rotor thickness, which the Ultralites technically have the same OD/Thickness as an OEM rotor. Someone can correct me if I'm wrong here, but I'm quite certain they are legal currently given they dropped some of the wording of old. The wording for ASP brakes is exactly the same as STU and I know there are evos running these in ASP at a National level as well.
More info on these rotors here: https://www.evolutionm.net/forums/ev...or-review.html
On a side note, it seems Girodisc is no longer making these variants according to a few websites....
Doug, excellent clarification! You are indeed correct and I could see how since I posted that in this STU thread, it could be misconstrued as being legal, which it isn't. Thanks!
Last edited by LV///R; Jan 14, 2022 at 05:38 AM.
Jan 15, 2022, 07:23 AM
#215
I don't know if that's true any more...
Here's the OLD SCCA wording for STU:
Non-standard brake rotors may be used provided they
are of equal or larger dimensions (diameter and thickness) and made
of ferrous material (e.g. iron). Thickness includes the individual plates
of a vented rotor, as well as the overall dimension.
For 2021 - Now the rules only talk about diameter and rotor thickness, which the Ultralites technically have the same OD/Thickness as an OEM rotor. Someone can correct me if I'm wrong here, but I'm quite certain they are legal currently given they dropped some of the wording of old. The wording for ASP brakes is exactly the same as STU and I know there are evos running these in ASP at a National level as well.
More info on these rotors here: https://www.evolutionm.net/forums/ev...or-review.html
On a side note, it seems Girodisc is no longer making these variants according to a few websites....
Here's the OLD SCCA wording for STU:
Non-standard brake rotors may be used provided they
are of equal or larger dimensions (diameter and thickness) and made
of ferrous material (e.g. iron). Thickness includes the individual plates
of a vented rotor, as well as the overall dimension.
For 2021 - Now the rules only talk about diameter and rotor thickness, which the Ultralites technically have the same OD/Thickness as an OEM rotor. Someone can correct me if I'm wrong here, but I'm quite certain they are legal currently given they dropped some of the wording of old. The wording for ASP brakes is exactly the same as STU and I know there are evos running these in ASP at a National level as well.
More info on these rotors here: https://www.evolutionm.net/forums/ev...or-review.html
On a side note, it seems Girodisc is no longer making these variants according to a few websites....
Feb 5, 2022, 11:23 AM
#217
Evolving Member
Jul 4, 2022, 01:03 PM
#223
Jul 5, 2022, 05:53 AM
#224
I've gotten some feedback. Figured I would take it here (suggested) to get more viewpoints. Is everyone going out and upgrading their intercoolers or is that a low yield upgrade? Seems our runs are so short that heat soak and timing being pulled would not be an issue. Thoughts?
Jul 5, 2022, 03:49 PM
#225
FYI - there's a 2022 thread 
https://www.evolutionm.net/forums/mo...cussion-3.html
For me, I was updating the car for the new rules and wanted to get all the power stuff done at once so I could get it tuned once and call it a day. (opted for the 3" ETS so nothing crazy - 24 lbs). It is more weight up front (though it's low, at least) and at these power levels I don't think you need one.
https://www.evolutionm.net/forums/mo...cussion-3.html
I've gotten some feedback. Figured I would take it here (suggested) to get more viewpoints. Is everyone going out and upgrading their intercoolers or is that a low yield upgrade? Seems our runs are so short that heat soak and timing being pulled would not be an issue. Thoughts?