Autocross questions

KevinB

I have decided to stay in Stock Touring category. I currently have stillen front/rear sways so I am going to put the rear stock bar back on and set the front to full soft for now. I have a non-sport touring model with the 18" rims and I need recs for a tire setup:

Option 1: keep stock sizes front/rear ... Seems to be limited in tire choices
Option 2: keep stock rims and upgrade tire size ... Uncharted territory for me as i have little knowledge of offsets, sizes, etc. (anyone have a setup that really worked well?)

Any comments appreciated!

__________________
09 6MT MB: Int/Ext LEDs, Stillen G3 + FI test pipes + FI cat back + Stillen sways + Clutch Helper Spring

Shamu

sCCA just announced a road tire class for stock cars that will happen at National tour events. All rear wheel drive cars will run in an indexed class. Given 370z is CS you would have favorable pax. This might be perfect timing for you. Just need to find good street tires that fit your wheels. Not sure what tire would be best?

__________________
Grant

KevinB

Shamu,

I am thinking of going with 245/45/18 up front and 275/40/18 (base, stock 18" rims). This will keep a staggered setup with bigger tires than I have right now.

For tires, I am considering trying the Continental Extreme Contact DW. They have gotten some good reviews:
http://www.modified.com/tech/modp-09...s/viewall.html

And they are about $800 for four corners (including shipping).

Since this is my first foray into autocross I don't have the skills to push the car hard enough to make (in my opinion) a big enough difference that I would need to go with a much more expensive tire.

In regards to sway bar settings ... I have stillens up front and rear ... any suggestions regarding stiffness front vs. rear?

__________________
09 6MT MB: Int/Ext LEDs, Stillen G3 + FI test pipes + FI cat back + Stillen sways + Clutch Helper Spring

Shamu

245 won't be enough front tire for autocross.

I'd reccomend Hankook RS3 in 265/35/18 front and 275/35/18 rear or even 275/35/18 front and 285/35/18 rear. Hard for me to say what will work on your car in bar department as I don't know what else you have but 370 needs lots of anti roll especially with stockish camber settings so I'd start with at least mid settings and then experiment.

If someone were to hear my setup they'd say no way would it work for ax. I have huge 35mm front bar and 1000 lb front springs with stock nismo rear bar and 450 lb rears. I spent lots of time on camber and toe settings but you can't do much about camber in a stock car.

__________________
Grant

IMWEZL

Is the 370Z still CS for stock classes? My local region told me I was BS. I ran against a Subaru WRX STI that put up one heck of a fight throughout the day and edged me out.

Going by the 2011 classification list it states the Z as CS.

Also any tips on psi settings for the RE-11s? I chewed the fronts up a good bit on the course we ran but then again that was more than 15 runs on a 25-30 second course.