Introducing myself. I ran STX for 5-6 years in my 2002 WRX (I had started what became the definitive STX setup thread over on NASIOC). Won a few STX titles (locally only) before I quit autocross for ~5 years. I was burned by the STX rule changes in the past (specifically the 265 tire allowance for RWD that dethroned the 2.0L WRX from its title as "the car to have" for STX, and later the inclusion of the newer 2.5L WRX models into STX. So I'm wary of rule changes burning me again.
With that said, I'm building the BRZ for me. I have an end vision in mind, and that will be in SM class, where I'll probably lose every event but at least the car will be fun. Along the way, though, I would like to build the car to be reasonably competitive in STX, and maybe I'll stick around in the class if I like the way the car drives. Once I got my BRZ I got back into autocross (casually) and ran CS with literally no setup other than RE71Rs (not even an alignment lol).
Finally decided to move the BRZ to STX. Looking for some general setup advice. Will be running RS4s in 255/40, unless you can convince me otherwise. Know it's not the faster tire, but didn't like the wear on my RE71Rs, and with this being a semi-daily driver, wanted better wear. Also will be likely doing a few track days this summer or next, and I know the RS4s will survive that better.
1. I will have FA500 coilovers w/ custom rates to start with, with SPC control arms in the rear. Saw some recent conversation on this but wanted to check: If I lower ~1" to 1.5" in the rear, can I achieve 0 toe with the OEM toe arms? My end goal for camber in the rear will be -2 to -2.5 degrees. I know that lowering the car adds camber, but if I dial it out with the LCA I believe it will add toe out correct? I'm only familiar with mcpherson strut suspensions so any help here is appreciated. So maybe running more camber will be beneficial for getting 0 toe in the rear with the OE arms?
2. Fronts I will run the FA camber plates with an OEM crash bolt in the top hole. Hoping for -3 camber but would love more (around -3.5?). Any thoughts as to if this is possible? Maybe I should consider a different (eccentric) camber bolt? I seem to recall running 2 camber bolts up front in my WRX without camber plates, but I couldn't remember if you could run camber plates + 2 camber bolts or not.
3. Could you elaborate more on what you found here regarding the axle issues?
Quote:
Originally Posted by jbailey8748
I am 3/4" lower rear and 1" front. And don't have that bad of a time. Might have gone lower but research told me that 1" and lower in the rear causes axle problems
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Really sorry for the long post. Brevity is not in my skillset. The main goal of this post is to avoid multiple trips to the alignment shop - trying to get it right the first time (don't want to find out I need more parts or need to change ride height at the shop).