Welcome to the North American Subaru Impreza Owners Club Monday April 21, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC General > Motorsports > Autocross

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 08-13-2009, 03:12 PM   #1
Jonnywrx
Scooby Specialist
 
Member#: 207782
Join Date: Apr 2009
Chapter/Region: South East
Location: tallahasse/ ft. luaderdale
Vehicle:
2006 WRX TR
SGM

Default R compound question

So I did my first autox a couple weeks ago in the DS class. However I was running street tires and a couple guys were on r-compounds. Can I run slicks in the DS class according to SCCA rules? Dont wanna buy a spareset of wheels and tires if not needed.
* Registered users of the site do not see these ads.
Jonnywrx is offline   Reply With Quote
Old 08-13-2009, 03:23 PM   #2
CamaroFS34
Scooby Guru
 
Member#: 6850
Join Date: May 2001
Chapter/Region: MAIC
Location: SoBWI, MD
Vehicle:
Lots of ESP cars
'06 IAG WRX & LT1 Z28s :)

Default

You can't run slicks, but you can run DOT-rated tires such as the Hoosier A6 or the Kumho V710.

The key word is "DOT-rated." If it doesn't have the DOT rating, it's not stock legal.
CamaroFS34 is offline   Reply With Quote
Old 08-13-2009, 03:30 PM   #3
Splash
Scooby Specialist
 
Member#: 55936
Join Date: Feb 2004
Chapter/Region: MWSOC
Location: Columbus, OH
Vehicle:
04 WRX STi
PSM

Default

You can run any DOT-approved tire in Stock. This includes the Hoosier A6 and Kumho V710, the top-2 favorites.

There are such things as racing slicks, which are not DOT approved that you can't run in Stock, but you can run them in Prepared and Modified classes.

That said, I recommend you drive on street tires for a season while your driving improves. R-tires will be worth more once you know more about where to push and where not to.
Splash is offline   Reply With Quote
Old 08-13-2009, 03:56 PM   #4
Jonnywrx
Scooby Specialist
 
Member#: 207782
Join Date: Apr 2009
Chapter/Region: South East
Location: tallahasse/ ft. luaderdale
Vehicle:
2006 WRX TR
SGM

Default

What kind of shoulder would be best?
Jonnywrx is offline   Reply With Quote
Old 08-13-2009, 04:16 PM   #5
Draken
NASIOC Supporter
 
Member#: 16
Join Date: Jun 1999
Chapter/Region: BAIC
Location: Chico, CA
Vehicle:
1964 Autodynamics
Formula Vee

Default

I like broad shoulders. And big calves.
Draken is offline   Reply With Quote
Old 08-13-2009, 07:38 PM   #6
Jonnywrx
Scooby Specialist
 
Member#: 207782
Join Date: Apr 2009
Chapter/Region: South East
Location: tallahasse/ ft. luaderdale
Vehicle:
2006 WRX TR
SGM

Default

I saw there were 3 types. And im a serious noob when it comes to r-compounds. Rounded shoulder, Heat cycle, Square shoulder
Jonnywrx is offline   Reply With Quote
Old 08-13-2009, 07:54 PM   #7
Cr0usEEE
Scooby Newbie
 
Member#: 220048
Join Date: Aug 2009
Location: Cincy, OH then Nagoya, Jpn
Vehicle:
2000 Camaro
Black

Default

Don't worry about heat cycle for autox...it really doesn't matter with the current compounds.

Rounded shoulder is for people who have limited negative camber up front...Usually best with stock class cars.

Square shoulder is best if you are running 2 or more degrees of negative camber.

And that would be for Kumho's...

Hoosiers only come in one flavor and they LOVE CAMBER...and hate Mini's
Cr0usEEE is offline   Reply With Quote
Old 08-14-2009, 01:11 AM   #8
MurphysLaww
Scooby Specialist
 
Member#: 171245
Join Date: Feb 2008
Chapter/Region: TXIC
Location: Aeh-town
Vehicle:
99 328i
STX for 2013?

Default

I'm lovin' my Kumho XS'es. They are about as close to an R-comp as you can get. 235/45/17's ran $173/tire @ Tire Rack.

I'll be running DS/Tire class.
MurphysLaww is offline   Reply With Quote
Old 08-14-2009, 08:41 AM   #9
neilschelly
Scooby Specialist
 
Member#: 94902
Join Date: Aug 2005
Chapter/Region: NESIC
Location: Merrimack, NH
Vehicle:
1988 911 Carrera 3.2
Silver

Default

If you do decide to get R-compounds, you'll need another set of wheels/tires for it. They are very expensive tires to drive on the street for all of the few miles they'd be good for before the wear bars are through. And if it's raining, that will be a scary few miles. ;-)

I'd concur with others just to drive for now. Tires will make you faster, but not by as much as just coming to a second autocross.
-N
neilschelly is offline   Reply With Quote
Old 08-18-2009, 01:40 PM   #10
bcblues
Scooby Specialist
 
Member#: 17256
Join Date: Apr 2002
Chapter/Region: MWSOC
Location: America's Outback
Vehicle:
04 STi
Blue w/ custom bug splat

Default

IMHO, tires are the single biggest improvement you can make to your times in AX. Since you just ran your first AX, I would recommend a quality set of ultra performance street tires for your first season. Kumho XS or Dunlop Direzza Star Specs are excellent tires for both street (during the summer) and AX, and are reasonably priced. You will learn more driving on the ultra street tires than you will driving on r-comps the first season - unless you are some sort of driving prodigy.
bcblues is offline   Reply With Quote
Old 08-18-2009, 07:03 PM   #11
Jonnywrx
Scooby Specialist
 
Member#: 207782
Join Date: Apr 2009
Chapter/Region: South East
Location: tallahasse/ ft. luaderdale
Vehicle:
2006 WRX TR
SGM

Default

Thanks for the help guys, Im gunna try to pick up some beater rims to throw on for when I race.
Jonnywrx is offline   Reply With Quote
Old 08-19-2009, 08:15 AM   #12
bcblues
Scooby Specialist
 
Member#: 17256
Join Date: Apr 2002
Chapter/Region: MWSOC
Location: America's Outback
Vehicle:
04 STi
Blue w/ custom bug splat

Default

You can drive daily with the ultra street tires. No problem (except in snow).
bcblues is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
STi swap wiring question BMXspears Subaru Conversions 7 06-04-2010 02:32 PM
Compound allignment question CalcVictim New England Impreza Club Forum -- NESIC 5 04-30-2004 08:09 AM
Hoosier R-compounds Questions uuarex Tire & Wheel 18 04-16-2004 02:49 AM
R Compound Question jonmacs22 Mid Atlantic Impreza Club -- MAIC 7 02-24-2003 08:04 PM
R compound tire wear question??? 2QUICK4U Brakes, Steering & Suspension 24 03-05-2002 12:02 PM


All times are GMT -4. The time now is 09:23 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2014 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.