This thread will be for People pursuing STX in the BRZ.
Lots of "Different" kind of info here vs. the WRX..not much will cross over.

So some basic STX Rules:
-Allowed 265 tires on 9 in wheels if needed>
-Allowed Tune, E85, Headers w/cat, exhaust system and intake system up to the throttle body.
-sway bars, Bushings, Endlinks, Camber plates and any shock/spring package availalbe
-aftermarket BBK as long as they are the same size or larger than stock. Brake Lines can be changed to Stainless with any fluid.
-Lightweight battery as long as it puts out the same voltage. and you can re-locate it if needed to the trunk area.
-engine and tranny mounts as long as they are NOT solid
-Any LSD.
-Any Seats can be used but there is a minimum weight.


What CAN'T BE DONE:
-no engine internals
-no Tranny/rear diff Gear changes
-no throttlebody work
-Radiators have to comply with Stock


thats the Jest of it...there's other particular rules. But these are the basic ones.

Theres a couple of STX Build Threads available:
Scooby South's STX Build

And

Simmons-Racing STX build

this should get you started.

Sweet!! Someone did see my post!

^^^ T'was a great Idea..

*checks watch*

Took you long enough!!!

--kC
(Kids these days. Sheesh)

Count me in.

So I made a wish list of my car and the approximate cost..I need to win the lottery..:/

Future STX mods
***8226; Front Four Pot BBK upgrade with 2 pc Rotors $2000
***8226; Header $500
***8226; Over-pipe $300
***8226; Catted Mid-pipe $400
***8226; Rear Sub-Frame Bushing $50
***8226; Frt LCA Bushings $200
***8226; Rear Control Arms $600
***8226; Engine and Tranny mounts (inserts) $???
***8226; Front Adj Sway Bar $200
***8226; 1.5 way Rear LSD $2500
***8226; Front Splitter $250
***8226; Tune***8230; $1000
***8226; Light weight Seats $750ea

with all this I expect to be around 2500lbs and have 200 Whp(Est) this is extra from what is already done:

* KW Variant 3 Suspension
* Front Camber Plates
* 17x9 Wheels
* Hankook 245/40/17 RS3's
* Kartboy Rear Endlinks
* Kartboy Rear Diff Bushings
* DIY Intake w/K&N panel filter
* Lightweight Battery
* Muffler delete
* Stainless Brake lines
* Motul Fluid Change
* additional Rear Bars as needed 16mm(WRX) 19mm (STi)
* Various other Kartboy items.

I can save you $250...

Splitters are not legal in ST.

Also if you went with aluminum seat, like Ultrashields, or Kirkeys, you could get both for about the $750 price not each. It depends on what you want.


As far as the lottery goes....

ONLY IF I DON'T GET IT FIRST!

1000 for a tune?!?!

thats including dyno time and a custom tune/software/flash

I am purposely shooting these a little high just in case of any issues..


Bill

Well the ECUtek cable and license is $700. Anything beyond that is what the tuner is actually charging you.

Yeah unfortunately right now Ecutek is the only game in town for the BRZ/FR-S and Cobb has zero interest in the car. If you are willing to just get your car tuned (say you live near a tuner) you can save $350 and not get the cable which lets you reflash the ECU yourself, but then when updates come or new features come out you are out of luck or need to borrow a cable from someone. I was hoping open source tuning would be further along but it's not yet.

You can probably get an LSD for a bit cheaper than that. The OS Giken one just released is around $2K, Cusco is around $1500 and I think the Kaaz is a little cheaper yet.

Definitely look for used seats. I have a pair of Sparco Prodrives which have been sitting in my garage for years now. Too bad they are so expensive to ship.

Thats interesting that cobb has no interest. I would hold out until OpenSource tuning is further along...shouldnt be long...its a popular car.

Also, why no interest in fitting a 255 or 265 tire?

255 will be my replacement...MOST likely..however.. I know someone thats using 255 RS3s right now...and with the extra weight penalty, he didn't think it was worth it ..meaning he thinks he's giving up time... soo he wishes he would have went to 245's instead...265's..absolutely overweight for little to no gains..and maybe even given up some time... I didn't mention it because I still have PLENTY of Rubber left for 2013..3000 miles and 107 runs..I will say that the car is VERY EASY on tires...so far.. I havn't even got to the real Goodie of the tire yet... 7/32's right now starting off at 9/32's..

Bill

I too have been very happy with how easy on tires the BRZ is. I only have 1.5 degrees camber up front and 1.0 in the back and my wear has been light AND even. I've run Star Specs and R-comps with this alignment and the wear has been good on both types of tires.

brz is super happy fun time

Why waste $2K on a BBK? That shouldn't be necessary for an AutoX car.

Now...if you are wanting to do other stuff beyond AutoX, then I understand.

In STX it's really for weight reduction and the fact it's a popular mod people do on street cars whether it provides benefit or not on an autocross course. It's certainly pretty far down the list for most people unless you are also tracking the car. It's a way to drop 20+ lbs of weight from the front.

What he said. One package I saw is about 20lbs net and a great location to lose it from.

That's surprising. I can see that benefit, then.

Also, from an aesthetic perspective, the BBK would look much better under a set of 17's than the stockers.

yep...its all about the weight.. matter of fact contemplating Exhaust Strategy right now.. With the header back to be completely replaced for probably about 50lbs of weight savings over the stock stuff.. and thats a guess right now, 50lbs. won't know til some other items become available to see how close that is to the actual savings. Triple benefit on the BBK..

Bill

You should have bought the Premium if you wanted the lightweight

Simmons

18lbs for the extra amenities???..I hear ya tho..

Bill

All Bill has to do is take a dump before he runs and that weight becomes lost in the wash.

My take on autox weight is this... try and reduce the weight of the car, but there's a time where you get diminished returns. When you're running against people that are 50+lbs lighter than you (I'm talking a persons actual weight), does that $500-$1,000 you spent on a mod primariliy to reduce 10 lbs worth it? Not in my eyes. Not for autox anyways.

IOW, drive better.

--kC