Let's discuss SCCA Stock Class
 

I'd like to get a thread started for those that are going to race their car in Stock Class.

What have you guys done to your cars so far?

Alignment. Tires. Done.

did you get the oem crash bolts to add some camber?

Yeah, didn't want to kill my star specs that quickly :)

For Stock, you're going to need to get some R-comps.

Anyone out there on purple crack yet? If so, how are the tires wearing with the little camber adjustments the car can get? I'm afraid R-comps on the BRZ/FRS will be similar to the HS Minis who cord shoulders after 20 runs :/

There is various information spread across a few different threads in here. The RTR thread is basically stock setup on street tires. There is also another generic autox setup thread.

I have 245/40/17 A6s right now but have yet to race on them the next event is next week and I'm hoping to try them out then. Others have been racing on that size but either aren't on the board or are not as active. I have a 275/40/17 A6 I am going to try and test fit but I doubt it will fit in the front.

As far as setup thus far it's really just an alignment with the crash bolts and some have done muffler deletes and air filters. I have a Nameless muffler delete and aFE filter.

Swaybar options are coming. Right now Cusco has a couple front solid bars, Tanabe has a hollow one, Strano will have a hollow one as well.

Shocks will come too but nothing out right now. The car feels pretty good on the stock shocks.


As for tire wear most have gotten -1.2 to -1.6 in front with the bolts. It won't be like the mini at all. That car has more weight in the front and it's FWD. I would expect at least 70 runs out of a set of Hoosiers unless you are overdriving them.

good info. do you think the r compounds will overburden the stock suspension? is this when you would add a stiffer sway bar to reduce the roll due to the added grip?

we have a c stock street tire index that allows us to race in c stock but on street tires. i'll most likely get a set of star specs once i wear out the OEM tires. do you think a set of 215/45/17 star specs will be too sticky for the oem suspension to handle? would a 'medium' stiffness sway bar be needed to compensate?

I want to drive it with the stock swaybar first to see what the effects are before jumping on the swaybar bandwagon.

You aren't going to really overburden the stock suspension, plenty of guys are using star specs in wider sizes with the stock suspension.

I think a front bar may end up being good for race tires for maintaining camber but also keeping the inside rear on the ground so the Torsen LSD works. Although I haven't really heard any stories of major wheelspin autocrossing. I don't think the car will need a big bar even on race tires.

I think it's going to need an FSB, and might be like the RX8 where it needs one on street tires more so than race tires thanks to the way the Torsen wants to work. The runs I took this past weekend I suffered from the lack of confidence in the rear in transitions so the FSB will be huge until we get shock options that really can fix that behavior IMO. I'll be doing more testing soon, next time on Star Specs after Nationals.

I've driven about 80 runs in my car so far on the Star Specs, maybe half with the stock bar and half with the Cusco bar. It needs a bar. The rear tires just don't connect very well without it. It really needs an even bigger bar, but none is available until Strano releases his.

Maybe this won't be as big an issue once we get some shock options, but for now ...

Des, what kind of rear toe setting are you running with the Cusco?

20mm Cusco?

Phil

One eighth total, dialed back to zero, and now back to one eighth. Until I unlearn my FWD habits, mild push is preferrable.

yes, 20mm Cusco

where did you guys purchase the camber bolts? the toyota/scion dealers are asking for $10 per bolt. online parts stores are looking for $5 per bolt plus $10 in shipping. it ends up being about the same.

Local dealer sold me mine for $6ea plus tax.

anyone experience any chunking on the oem or other street tires?

You can on OEM and all season tires, even some summer tires if you don't manage the heat and get your camber dialed in. Did let them get very hot? Are you spraying them down with water between runs?

didn't get any real chunking. i got some some small cracks here and there. maybe small pieces of rubber missing in some spots. i didn't water them down when i ran, but i will in the future. i suppose i'm not complaining about toasting the oem tires too much as i plan to get star specs once they're done.

I put my BRZ on the scales tonight, no spare, tools, cover, floor mats, cup holder, Gas light just came on. Still has full stock exhaust, stock wheels/tires.

2,645 lbs

http://i710.photobucket.com/albums/w.../brzweight.png

Simmons

Wow, that's light. I got a fat one!

I weighed mine stock except for 235 Dunlops at the SoCal Divisional, right after I got the car; it came in at 2,720. Kevin Taylor's FR-S, with exhaust cutoff, lightweight wheels and 225 RS3s, was 2,675 if I recall correctly.

I'm sure scales skew a few pounds one way or another, but I thought the FR-S was supposed to have a little less heft.

I got a stupid question.. Is it against stock rules if I get a BRZ premium and add the OEM trunk spoiler?

Mine, weighed at the Super Regional, came in at 2675, sans spare, tools, mats (all of them), light wheels, owners manual, muffler delete pipe, and 215 RS3s.

Yes. Also expensive because you have to install the entire trim along with the spoiler. Plus the spoiler is heavy.

I actually would disagree, locally at least. I don't believe there is any performance advantage so unless you win nationals, I would say this could fall under comfort and convenience on a regional level.


Simmons,

Thanks for the weight, its encouraging! My car should only be 14lbs heavier and you still have the 20lbs of wheel weight to lose, possibly more. Do those scale usually measure pretty accurately?

On the same scales my STX Rx8 weighed 2,810


Simmons

Yes they are accurate. I weighed my other cars on these and SCCA scales with the same results.

Simmons

Cool, thanks again, good info. On your alignment, did you have to wiggle anything in the rear to get your settings? Seems like the rear is pretty good compared to some I had seen. We could probably talk about this at Nats but probably other people are curious.

Gas Is pretty heavy and would explain some of the differences I can't remember anyone weighing the car with the light on.

57/43 weight distribution but that's not surprising. The bulk of the weight loss is in the rear of the car. With some lighter wheels and tires and a muffler delete pipe you could get awfully close to 2600 lbs. I was shooting for 2650 in my limited. There is a good 6-7 lbs if you drain the washer fluid. :)

Of course I could probably stand to lose a few lbs myself.

Granted, the weight wouldn't be a great penalty, in fact, I could lose that much weight or more off of my fat ass, but the expense would still be there, wouldn't it? It is my understanding that any trim change has to include the entire trim, so it would need the leather/alcantra seats, the keyless entry, and on down the line.

Of course, local groups can grant exceptions if they want. Locally, we are talking about letting a 1st generation Boxer run in STR eventhough nationally it can't.

That's crazy talk, I'm not dieting which would save me money when I can more expensively buy lighter car parts and eat like a fatty. :)

According to the Subaru website, a BRZ premium has the Limited wing as an line option. Putting it on the FRS of course isn't as grey but I would do it and make fun of anyone saying I did it to make the car faster.

It may not be legal, but doubt anyone would protest the wing.

My post might have been misleading, My front camber was -1.6 left/ -1.4 right. My rear was only -.5 and -.9


Simmons

That was going to be my next question, hoe Low can you run the gas without starving?

Simmons

That's very low compared to mine (-1.6 and -1.9 but I had nearly a full tank of gas) but again looks consistent with the fact most seem to have more negative camber in the right rear stock. Did you try to change anything or is that just OEM with no wiggle attempts?

I ran the car with not quite the light on with no issue but low grip from the stock tires. If its like the WRX, we might be able to run well into the light being on.

I have only heard of Phil at Element Tuning having a fuel starvation issue but that was on a road course using like 285 Hoosier slicks... I really don't think it will be an issue running the car with less than 1/8th of a tank.

Interesting on the rear camber differences. I'm at around -1.2 in the left and -1.3 in the right with regards to rear camber, I don't remember how much gas I had at the time. -.5 and .-9 seems pretty low. The car really changes camber based on height but you figure maybe 60lbs for gas, I'm not sure about it making that big of a difference.

What trim? It's a standalone option on a Premium.

It's a port installed option which isn't legal to add to a Premium car. So you would have to turn the Premium into a Limited to legally use it.

Subaru has the weird situation where the port options are their factory options installer as you probably know. So many port options are stock legal and listed partially in the rule book. For a WRX things like the port installed short shifter, boost gauge, etc are legal in stock explicitly. You could go and get an SEB clarification on it but again since its no performance advantage, I'd be willing to take my chances.

We've started out with the light on, taken 16 runs on concrete on Dunlops with no fuel-starve issues, and still only been able to put 12 gallons or so into the tank afterward.

All my info is over in the other stock class discussion ;) (http://www.ft86club.com/forums/showthread.php?t=6319) but to address some items here:

I've run 225 AD08's for well over 100 runs (flipped at 115), usually with a co-driver, including some pretty hot days (only felt the need to borrow a sprayer once) with no problems.

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FWIW, my BRZ premium weighed 2,650 on the scales at the Dover SuperShootout. I didn't bother recording corner weights because the setup wasn't perfectly level. That was just finished running - no trunk/interior junk, fuel light just on, 15.5 lb wheels, otherwise completely stock.

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We've run 8+ runs with the fuel light on and not had any problems on AD08's on fairly level lots - however, it has never taken more than 11.X gal. to fill it afterward.

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DWX - please keep us posted on your A6 experience - I'm curious how the life expectancy will turn out!