SCCA C Stock Discussion
 

I'm probably not the right guy to start this thread but there doesn't seem to be one to go along with the RTR thread. CS guys, lets share our knowledge and kick ass.

I'm a mediocre driver 5 years removed from 5 years of experience in a poorly prepped STX WRX. My first event in the new BRZ will be May 19th with Iowa Region/DMVR.

Setup for this event:
- 245/40-17 Hankook Z214 C51 on stock wheels
- ... That's it. Factory alignment, stock struts, etc.

I'll update with results after the event. This will be my first since a single event in 2008 and first time in a RWD car. Looking forward to it but not expecting to do very well.

i've had mine out at one event so far. stock everything. wow these tires are like driving on ice. i come from a FWD half prepped STF car for the last 4 years.

IMO: in stock either you run R comps or you are just there to have fun, not to win.

anyone think these cars can place top 3 at nationals in CS?

we now can get lighter wheels, better pads, the right tires, good shocks, and muffler deletes. anythign else on the must have list?

I'll be playing in CS for the rest of the year. Then depending on what
happens with the Street classes I'll pick somewhere to go.

What's on the car so far:

Enkei RPF1 wheels, 7x17"
Hoosier A6 tires: 245/40R17
Modified Strano front sway bar
Camber Bolts: gets me about -1.4 deg (if i measured it right)
Koni Sport Shocks

Going on the car (real soon now):
Nameless Performance track pipe
Motul 300 tranny/diff fluid

i think that's it... also working on the steering wheel spacer but i suspect
that is a lost cause.

maybe if none of the MX-5/Solstice/370Z cars show up... ;)

I haven't autocrossed for about 7 years, and then only in AWD cars for the most part, but here is my current setup:

Velox PG-5S wheels, 17x7 +42
Hoosier A6 245/40/17, running 34F, 32R pressures
Strano 22mm hollow front bar, Whiteline adjustable endlinks (currently at about stock length or else the bar hits the frame)
MCS DA shocks
Camber: Front about -1.2 on each side, can't remember the rear
Toe: 0 front, 1/16" toe-in rear
Perrin catback
Radium catch can

I' wasn't able to do any events last year and have done 3 events so far this year so I'm just trying to dial things in. Results so far have been mixed imho, mostly driver related. :)

With a good driver it's definitely capable of trophying but if the right drivers show up in the Solstice, MSR, and 370Z it's not going to be in the top 3. Not on a nationals style course IMHO. Jay Toussaint has a well prepped one but he was pretty discouraged after Dixie (lack of torque and rev limiter) and may not run it nationally any more.

If the rev limiter didn't completely suck the life out of the car it might be a different story. Having to shift or just coast to not hit it just costs time. If we move to streets it may slow things down a little bit so it's not as much of an issue, really a couple MPH makes a decent difference. I won't be running race tires next year, so I'll either be in the Street class or RTR if that doesn't pan out, or STX.

I plan to be attending neosho,MO on the 19th for my first auto x event ever also this is my first RWD car the only mods I will have is the berk muffler delete also have rear seats removed and my spare tire

can you quote the part of the rules that lets you pull the rear seats?

Feel free to use the non-tire sections of my thread.
@dwx, where can I buy those wheels and what's the approximate cost?

This is my first auto x event like I said in the previous post this is what I plan to do obviously if that's an issue it's not going to happen

removing the rear seats puts you in Street Mod, Prepared or Modified.
you do not want to be in any of those categories.

put them back in and go have some fun.

I'm surprised at those running 245/40-17 on 7" wide wheels. Do you get full contact? Any need to adjust pressures lower for a relatively narrow wheel? Or is that the best width? If so, I'd just as soon keep the stock 17X7's with 245/40's and put the cash into intake, exhaust and sway bar for C Stock instead.

physics don't apply when it's hoosiers

First off, no Intake in Stock, just air filter. Second, Intakes tend to suck on this car without a tune.

Third, as this quote sums it up:
Hooiser have SUPER stiff sidewalls that will hold up as long as you are making contact, which they indeed do. The tires are build with small wheels in mind so the bead bends in enough to fit.

I agree, 245 Hoosiers must be huge! How much do sidewalls slant in? I know that the trend has been overly wide r-comps in the stock classes for a while now so I guess I shouldn't be too surprised.

Ideally you'd want a wider wheel with a 245. Since we can't do that we just put the biggest tire on the stock 7" wheel we can. Glad to see I picked the same size as everyone else. :) My GoPro just came so I plan on recording and logging all of my runs, which I'll probably start another thread somewhere for.

s2k guys cram 17x7 in a 275 at the front, lol.

Solid pun?

Actually, it's rather hollow.

Heh not intended but I realized it as I typed it.

subn'

The ITR guys put a 275 on a 6" front.

Unfortunately the PG-5S are discontinued, the only place to get them was direct from Velox. When I bought mine last July they only had 6 wheels left. I actually just bought a fifth wheel about a month ago along with another BRZ owner so they are gone now. They are 13.8lbs in 17x7 5x100.

Had my first event of the season yesterday (and first in 5 years). The results haven't been posted yet and my number was screwed up so I didn't get my times, but I did "alright." Looking forward to some respectable times in upcoming events.

We had 6 runs, the first of which was a DNF. I only got that and my 2nd run (my slowest by far) on video because of mind blowing horrible battery life on my new GoPro.

[ame="http://www.youtube.com/watch?v=K5htDszs_28"]Iowa Region SCCA Autox - May 19 - Run 2 - YouTube[/ame]

After reading this forum I'd planned to run my nearly stock FR-S in SCCA RTR but found that my region doesn't have that class listed in results. It appears that they either put the lightly prepped twins into either C Stock or Street Tire, or the entrants choose other classes. I emailed them to ask if it was OK to run RTR but haven't heard back yet.

If the entrant pays the SCCA fees and chooses RTR, do they have to open that class for the first time this year?

They'll let you run in whatever class you want. The only reason you might want to change is to actually have someone else in your class.

Got any pictures of the fitment on that? That sounds pretty crazy lol.

Looks smooth, like the low angle.

What RPM did you launch? It sounded like it bogged for a moment. Is there an optimum launch RPM for the FA-20? My previous limited launch tests with Toyota VVT-i on a 2JZ IS300 5M/T showed a lower RPM (2,500 or so) produced better times than a wheel spinning start. Apples and oranges, but might be similar.

I'd enjoy competing against other twin pilots but all of them (3) are in STX so are probably more prepped than my budget allows.

It's not too bad. Race tires are made to go on too-narrow wheels. Hoosier makes a 255/45-17 that I would like to try but the extra $75 a tire and being taller means I probably won't.

http://i.imgur.com/BBJAZhk.jpg?1?2858

That was a pretty bad run, almost 5 seconds slower than my fastest. I hadn't actually launched the car once until that autox. I just hit 1000 miles on the car when I pulled in to the site. That launch was probably at about 4k and I probably dumped the clutch too fast. I played with it and by my last launch I was better, about 4500 and let the clutch out a lot slower.

The camera was mounted to the tow hook with a handlebar mount.

You'll be competing against them, officially or not. ;) Honestly if your car isn't fully (or at least nearly) prepped I wouldn't worry about what class you're in at all. Just go out there and have fun, register in whatever class you want. The classes that your region are listing are just what people have registered in. If you register in RTR it will show up.

One thing I forgot to mention - I brought my sprayer, air hog, pyrometer and tire pressure gauge but decided after my first run I wasn't going to mess with them and would just concentrate on driving. I did take temps on the front tire after one run though. 93-91-89, outside to in. They're begging for more than my stock camber. I'm having a tire mounted tomorrow (the tire place damaged one of my brand new wheels!) so I'll put the crash bolts in tonight and have them throw it on the alignment rack.

I read the SCCA rules updated 5/1/2013 but didn't see RTR even listed as a class in Appendix A. What did I miss?

http://scca.cdn.racersites.com/prod/...ated%205-1.pdf

That has me all confused too. I had already bought tires when I heard about it so I didn't look in to it much. There's an RTR thread with guys I'm sure could help you out though.

RTR is a supplemental class for SCCA Nationals and National Tour events.
as such, your local region may or may not offer it.

The only difference between C Stock and RTR is the R compound tires are not
allowed in RTR. RTR tires must have a tire wear rating of 140 or higher.

I would suggest you register in CS and just go have some fun. (unless your local
region implements RTR or has a street tire PAX class).

Does anyone know the thread pitch of the tow hook? I'd like to just replace it with a threaded rod to better mount my camera.

Ptuning makes a great mount but after having it aswell as the suction cup mount I prefer the suction cup it's easier to use and can be mounted literally anywhere

I'd rather pay $2 for a piece of threaded rod than $80 for one that's anodized.

i think this is what i use for my camera mount.
it's between your 2 buck bolt and an $80 anodized mount.... :)

[ame="http://www.amazon.com/Panavise-809-Camera-Window-Suction-Cup/dp/B000246ST6/ref=sr_1_11?s=electronics&ie=UTF8&qid=1369849359&s r=1-11&keywords=camera+mounts"]Amazon.com: Panavise 809 Camera Window Suction-Cup Mount: Electronics[/ame]

I have a suction cup mount but I can't bring myself to trust it. I had a handlebar mount on my tow hook for the last event but it's not quite long enough to work very well. So.. anyone know the thread pitch and size?

Hi Ed, what tire pressures are you using in the A6s?

I replaced the stock brake pads with some Stoptech Sport pads before our event this last Sunday, they are definitely much better than stock.

mid 30's.

above 37-38 the car was starting to skate.

ymmv

Okay I had been using 34F/32R but this last event switched it up to 32F/33R, didn't seem to make much difference.

M16x1.5

from what I've read it's not that easy to find this size. might be easiest to just buy an extra tow hook and cut/weld/modify it.

or what I did, as I had already bought a GrimmSpeed license plate mount that screws into the tow hook hole, I figured out the bolt size that goes into the front of that piece. (M8x1.25). Went to Home Depot, bought a bolt and piece of sheet metal bent in a 90* angle for about $4 total. Drilled a hole to fit the bolt through it, painted it black and used an adhesive GoPro mount on it.

http://i78.photobucket.com/albums/j1...ps5dbbf1d2.jpg

http://i78.photobucket.com/albums/j1...ps06aec6c0.jpg