The Autocross thread. Got questions? Get them answered here!
 

Lets direct all Auto-X specific technical questions to this thread.

Please be sure to specify your class when asking questions, as it will determine what the "best" or "proper" setup could be for your given setup!

What class will the 2017 BRZ's be placed in? I read through the draft rules that where put out by SCCA in December, but that specifically only listed BRZ's up to 2016.
Completely OEM.

Street Touring


#20344 Please class the 2017 BRZ and 86
Per the STAC, add the following new listings in Appendix A:
STX
Subaru
BRZ (2017)
Toyota 86 (2017)

Street class hasn't been announced that I've seen. A BRZ is prepped the same for CS or DS, so if that's your plan, forge ahead with at least camber bolts to start.

C

As of right now, all standard models will be DS. Toyota(Scion) FRS Release Series with TRD Springs will remain in CS. And by that logic, i'd assume Yellow and Black Series BRZ with sachs shock and brembos will also be in CS.

Edit: didn't know 15s had sachs shocks. well in that case, the brembos sure will keep it in CS.

My SACHS shocks put me in STX ;)

All the 2015+ have the Sachs dont they? And might not be in CS considering they don't get the sway bars or springs like the TRD, though they do get the aero bits.

Didn't realize 15s got Sachs. well in that case, doesn't the yellow and black series come with Brembos? if they do, i'm fairly sure it will stay in CS instead of dropping to DS.

They do have the Brembos in the performance pack option, and I believe it's standard on the yellow.series.

They also did get a more aggressively valved SACHS shock, I believe. That's probably what you were thinking of. But starting in '15 the supplier for the shocks on all models switched from Showa to SACHS.

OE dampers don't matter that much given that a prepared street class car will have Koni or Bilstein instead of whatever came OE. Crazy competitive guys will get those custom valved to get an edge.

2017 86 and BRZ got there own line due to changes made to the cars overall.
It will allow them to be re-classed on there own if needed.

The really crazy competitive guys will have something more hardcore such as MCS shocks. Just and FYI, there will be a local twin in DS with MCS two-way non-remotes this coming season.

2017 twins are likely to stay in CS unless otherwise classed.
Per the December FasTrack:

Move from CS to DS
BMW M3 (E36 chassis) (1995-1999)
Scion FRS (w/o TRD suspension components)(2013-2016)
Subaru BRZ (2013-2016)

What's the mandatory prep to jump from CS/DS to STX in these cars and be competitive at Nationals? Trying to decide if selling my RS1.0 or jumping it to STX is the better choice. Leaning towards selling...

To be competitive at nationals:

1) Driver that is Nationally competitive
2) A Coilover suspension setup with a proper alignment
3) 17x9 inch wheels with a competitive tire (new tires on the horizon but RE71R is a safe bet)
4) Basic power bolt-ons such as header, high flow catted over/frontpipe, exhaust and a tune to make it all work well

Carried over from CS would be a front bar and maybe the exhaust.

imo:

1. Wheels and tires, standard recipe is 17x9 w/ 245-40 good tires (re71r, bfg-rs)
2. Full adjustable alignment (camber plates, rear LCAs) over -3 degrees camber front, ~-2 rear. Toe to preference.
3. Coilovers, ~400# springs is the norm, quality valving, sway bars to taste
4. Header and Tune
5. LSD
6. Bushings
7. Weight reduction

Maybe flip header and LSD, idk I haven't done either yet.

An aftermarket LSD is not needed to win or trophy at all.

Locally or nationally? I'm not going to say your wrong, all I know is the top guys local to me are running 'em and they land top 10 at Nats.

:iono:

But I did put it further down my list because I think that suspension, alignment, and tire choice are all more important (along with the unspoken driving talent).

Edit: And from what I know about Minis, the LSD was critical to the STX win last year.

How competitive? Good coilovers and alignment, header and tune, 9" wheels and the tire of the year. That should get you pretty far.

You may be looking at full exhaust, an intake, and attention to weight to win (which means things like AP Sprint) so choose wheels wisely.

Wilcox has to have an LSD is much different than a FRS needing one.

Marcus last year didn't have a Aftermarket LSD, Pallotta didn't have one. Those are the last 2 winning FRS nationally.

There are also top 10 with just what he said (happens to match my list...)

Yeah should have phrased that differently on Wilcox. Interesting that '14 & '15 were won on the OE Torsen, I'll shut my mouth on that one then and consider easing my budget for this year.

:cheers:

Edit: Still sticking to the top 4 items on my list, that's probably minimal prep work for heading into a big event with a shot at the win, but it's not a bolt on and go setup, lots of knobs to turn in the ST setup.

I like the diff but it's not necessary.

As always, nationally competitive driver is step #1.

Yeah, where do we buy that upgrade? Would sure help me...

Personally I'd put it after an AP BBK kit.

I'm just starting my build, but this is current priority for 2017 season.

MCS Shocks/Springs/Plates
Header/OP/FP/Exhaust/Tune
Rear LCAs
17x9 ET35 Wheels
Intake
LTW battery
Minor Bushings
Rain wheels/Tires


For next years (or if I get magical money)
BBK
Diff
More Bushings


Sent from my iPhone using Tapatalk

He meant the driver mod...

And with regards to that, people rave about EVO school. And if you can get a nationally competitive co-driver in for even just a few runs odds are you'll pick something up.

Data analysis with said competitive driver will also help. Hell data analysis with someone on your skill level is also beneficial if you can build off each other.

Edit: And the BBK is really there for weight reduction right? Even street pads on stock brakes can provide ample stopping power, although I've started to fade mine at bigger courses, hybrid pads are on the docket for me this year, likely AX6s.

You did ninja edit, but I was going to say http://www.evoschool.com/

Also, Solostorm works wonders. Getting someone else quicker in the car and comparing data will show you what you can't see.

This list because it's the only one that starts off with driver mod.:thanks:

Yeah... No help yet, but I have data and faster codrivers. I think everyone is faster in my car than me. Looking into school timing... But I still have fun, even when someone beats me in my car...

I did phase 1 last year, loved it.

As far as shocks, I'm tempted to sell my singles and get doubles for this year, but there's no real reason to bother. That's not what's holding me back (that'd be lack of talent lol).

I really want to do Evo school, but doesn't come back to Norcal til October.

They will run the Advantage School on the test-n-tune day at crows for regionals though. Anyone have experiance with that one? Wonder if its worth it or just wait for phase one. I wont be running the event either so it would only be for the instruction

To be competitive?

Suspension: Adjustable coilovers, top hats for more camber, camber bolts, rear lower control arms to dial out too much rear camber
Wheels: 17x9....TR Motorsports stuff is pretty cheap nowadays
Tires: 245 or 255 Rival-S or RE71R
Power: Tune (power and extra rpm in 2nd) and Headers, assuming you already have exhaust

Top it off with a good alignment, I think that would be about the minimum to be "competitive"

Yeah, I'm playing with setup more just because I enjoy it, whether I can realize the results fully or not. It's likely I'll always be too cautious to be competitive at the top levels, but I might get close... And can certainly get closer.

I think that's my achilles heel for autox -- I don't do that much playing with setup and testing, just more or less go and drive.

I think I'd rather sell the car than drop $20,000 on STX. Thanks guys.

Since when did STX prep cost $20,000?

I did a full-tilt build on my 128i and never came close to that number


Sent from my iPhone using Tapatalk

lolwut $20k.

Annie just got MCS 2 ways, buy her old KWs, then just a header and tune (Drift office is close enough to you), and then just some 17x9s, 245s, and like $100 in whiteline bushings. LCA and a couple other things and you're on your way.

I can hit 20k if I go max build and put half that toward coilovers...

8k and competitive should be easy, buying new. That's only a little more than people spend on CS.

Just read this thread. brakes and diff are not required to win in STX, just because someone has one doesn't mean you need it too.

Pesos?