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Old 04-30-2019, 12:44 PM   #1
sls_06ion
Scooby Newbie
 
Member#: 262615
Join Date: Oct 2010
Chapter/Region: NWIC
Location: Star, Idaho
Vehicle:
18 WRX
CWP

Default 18 WRX classing help

I'm fairly new to autocrossing (something other than a stock car), I can't figure classing. I've got a 2018 WRX with the following modifications:
Rota KB F wheels - (+38 offset), Factory tires (re71r's soon), STi Brakes (F&R),full Nameless exhaust, Whiteline RSB 22mm, endlinks (F&R), AP, and Shifter.

I know that it will put the car is ST, but would it fall under X or U? Our local group has a SU (Street Unlimited, as a catch all) but we only get one year to run in it before we have to pick a class. I'm also aware that until I can get a proper coilover setup that I most likely wont be super competitive in the ST classes, given that I can't dial enough chamber into the car. And the tires need to be 200 treadwear, the 240 of the sportmax's are a certain short coming. The local guys haven't been much help in this, so I'm hoping you all might be able too

TIA
Tony
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Old 04-30-2019, 01:05 PM   #2
yellowblur
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Member#: 485903
Join Date: May 2018
Location: South Dakota
Vehicle:
2018 WRX w/PP
White

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2015-2019 WRX's are in STH. They haven't been in STX since 2017. BRZ's are in STX and STI's are in STU. It's possible your local club hasn't used STH since its a rather new class. Your car technically could also be in STU, but STH is the correct class.
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Old 04-30-2019, 01:36 PM   #3
sls_06ion
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Member#: 262615
Join Date: Oct 2010
Chapter/Region: NWIC
Location: Star, Idaho
Vehicle:
18 WRX
CWP

Default

Thank You, I've looked at the rulebook a handful of times, and apparently my brain only saw the turbo hatchback part but apparently never saw the Sedan part...
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Old 04-30-2019, 03:30 PM   #4
quiksilver_dragon
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Member#: 246479
Join Date: May 2010
Chapter/Region: MWSOC
Location: Wisconsin
Vehicle:
2005 Impreza WRX STi
Silver

Default

You have down "Full Nameless Exhaust." Does this include a catted j pipe? Or is it catless?

What is the wheel size and tire size you are going to run?

I'd want to check, but the brake swap will probably bump you into SM.
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Old 04-30-2019, 03:56 PM   #5
sls_06ion
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Member#: 262615
Join Date: Oct 2010
Chapter/Region: NWIC
Location: Star, Idaho
Vehicle:
18 WRX
CWP

Default

catted J pipe, wheels are 18*8.5 (same as factory, just changed offset to clear Brembo's). and when reading the st rules it said you could runner other calipers as long as they mounted the same as what was originally equipped and the piston count was the same or higher than stock

from the rulebook:


Disc brake calipers and mounting brackets may be replaced provided they bolt to the standard locations and the number of pistons is equal to or greater than standard. A functioning emergency brake of the same type, operation, and actuation as OE must be present.

Last edited by sls_06ion; 04-30-2019 at 04:00 PM. Reason: info added
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Old 04-30-2019, 04:05 PM   #6
Thorium06
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Sounds like STH
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