Welcome to the North American Subaru Impreza Owners Club Wednesday July 30, 2014
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
South East Region Club
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 Regional Areas > South East Region Forum

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 11-15-2002, 07:21 PM   #1
Burnout
Scooby Specialist
 
Member#: 4721
Join Date: Mar 2001
Chapter/Region: South East
Location: Asheville
Vehicle:
2002 2.5 RS
1997 Brighton

Question Autocross tire and rim decision help

Iím contemplating getting 15" rims for autocross fitted with Azenis. For comparison how do you think the grip would compare with my current setup? Right now I have 18x7.5 around 21lb. with Parada Spec. II 225/40/18, I would be switching too 96 legacy 15 inch alloys with a 205/50/15 Azenis?
Thanks
* Registered users of the site do not see these ads.
Burnout is offline   Reply With Quote
Old 11-15-2002, 09:57 PM   #2
DrBiggly
Scooby Guru
 
Member#: 11482
Join Date: Oct 2001
Chapter/Region: South East
Location: Winston-Salem, NC
Vehicle:
02 WRX
Acute Stickeritis

Default

That would improve your gearing a bit, giving you a little better acceleration. Plus I think the grip on those would be noticeably improved over what you have...but that's my opinion.

Hopefully some of the experts here in the SE will give their opinions too...
DrBiggly is offline   Reply With Quote
Old 11-15-2002, 10:21 PM   #3
silverscooby
Scooby Specialist
 
Member#: 15060
Join Date: Feb 2002
Location: NC
Default

Dude, get the new Niche Orca rims. They come in 22" and they only weigh 30 plus pounds. Plus they're chrome so you could blind the other guys with your bling bling!

Good luck with your tire choice man and go kick some tail!
silverscooby is offline   Reply With Quote
Old 11-15-2002, 10:55 PM   #4
Warp3
NASIOC Supporter
 
Member#: 161
Join Date: Aug 1999
Chapter/Region: South East
Location: WNC
Vehicle:
06 WRX TR (SGM)
89 MR2 (Ice Blue)

Default

You'll DEFINITELY notice a difference in acceleration due to the gearing changes (and lower polar moment of inertia (ie. the weight is closer to the center)) This will give you an advantage on any course where you can stay in 2nd with the smaller tires as you have better acceleration the entire time. This increase is negated (maybe even to being a slight detriment) if you get to a course that requires you to shift to 3rd and others can hold 2nd, though.

I ran 195/50-15 S-03s (on 15x6 Legacy alloys) on my car this season (except for a few races toward the end of the season when I ran 205/50-15 Azenii) and while my tire size will be changing for next season, I'm definitely planning to stay with the smaller than stock sizing concept.

Shane -- http://www.warpthree.com
Warp3 is offline   Reply With Quote
Old 11-15-2002, 11:29 PM   #5
Burnout
Scooby Specialist
 
Member#: 4721
Join Date: Mar 2001
Chapter/Region: South East
Location: Asheville
Vehicle:
2002 2.5 RS
1997 Brighton

Default

I was thinking it might make my gears a little bit smaller. On the courses I drive on now I hit third for a couple of seconds.

Do you think the grip level would be same or even better? And going smaller tire could I still be in STS?
Burnout is offline   Reply With Quote
Old 11-15-2002, 11:32 PM   #6
DrBiggly
Scooby Guru
 
Member#: 11482
Join Date: Oct 2001
Chapter/Region: South East
Location: Winston-Salem, NC
Vehicle:
02 WRX
Acute Stickeritis

Default

I think you would have more grip due to the tire change. Plus you would have more acceleration due to the wheel size change.
DrBiggly is offline   Reply With Quote
Old 11-15-2002, 11:55 PM   #7
Fred
Scooby Specialist
 
Member#: 3560
Join Date: Jan 2001
Chapter/Region: South East
Location: Four Oaks, NC
Vehicle:
06 STi, 02 WRX
94 Open Light 2.5RS

Default

I'm going with 17X7.5 next year - subzeroes and azenis. I'm not too fond of upshifting to / downshifting from 3rd gear that much. If I start feeling like I'd be better off the other way, I'll switch and let them be my street wheels and the stock wheels be my autox wheels. I wouldn't want to go with 15" wheels, though. Trying to keep it as simple as possible for the first year.

Got a question for the brainiacs - how much contact patch would you give up by decreasing the diameter & width of the wheel? Would that cancel out the (slightly) quicker acceleration? It seems to me that you'd want to maximize the grip, instead of going for acceleration...

Fred is offline   Reply With Quote
Old 11-16-2002, 01:09 AM   #8
Burnout
Scooby Specialist
 
Member#: 4721
Join Date: Mar 2001
Chapter/Region: South East
Location: Asheville
Vehicle:
2002 2.5 RS
1997 Brighton

Default

Quote:
Got a question for the brainiacs - how much contact patch would you give up by decreasing the diameter & width of the wheel? Would that cancel out the (slightly) quicker acceleration? It seems to me that you'd want to maximize the grip, instead of going for acceleration...
This was my main concern, cause I was thinking thatís quite a difference in size. The plus with running with the 15's is the coast, it's only $63 a tire or 252 a set, rather than buying new tires for my rims now that are around 141 apiece. That right thereís almost worth it.

Kevin I was just browsing through the vender GB forum and came across these Attacks http://forums.nasioc.com/forums/show...readid=275674, nice looking wheels and price. I think they weigh the same as the subzero's also.
Burnout is offline   Reply With Quote
Old 11-16-2002, 09:25 AM   #9
Fred
Scooby Specialist
 
Member#: 3560
Join Date: Jan 2001
Chapter/Region: South East
Location: Four Oaks, NC
Vehicle:
06 STi, 02 WRX
94 Open Light 2.5RS

Default

Yeah, I don't like those. Thanks for the link, though.

I think the price difference on 215/45/16 vs. 225/45/17 is around $40/ set of 4 Azenis. Big jump from 205/55/16, though...
Fred is offline   Reply With Quote
Old 11-16-2002, 12:22 PM   #10
Evegan
Scooby Newbie
 
Member#: 16578
Join Date: Mar 2002
Location: Greensboro, NC
Vehicle:
2000 Outback - 89E30
2003 NCAC DSP Champ

Default

Hmm, anyone know of a 15x7 or 15x8 wheels that'll fit subarus? I run in DSP (maybe SM next year) and would love to find a set of smaller wider rims. Maybe put some hoosiers on them, I don't know. Any ideas?
Evan
Evegan is offline   Reply With Quote
Old 11-16-2002, 06:03 PM   #11
Opie
Floresbian
Moderator
 
Member#: 470
Join Date: Oct 1999
Chapter/Region: South East
Location: Riverview, Florida - U.S.A.
Vehicle:
2015 Forester 2.0XT
'14 XV Crosstrek, '99 SF

Default

This depends entirely on the courses in your area.

I ran 16" the for 2 years and then switched to 15" last year, I am now back to running the 16". If you run only short, technical courses the smaller size will help you because of the increased acceleration.

If you constantly run courses (like I do) that are faster courses requiring top of 2nd and/or 3rd gear you will be having to change gear so often that many times you will end up losing time.
Opie is offline   Reply With Quote
Old 11-17-2002, 01:31 PM   #12
Warp3
NASIOC Supporter
 
Member#: 161
Join Date: Aug 1999
Chapter/Region: South East
Location: WNC
Vehicle:
06 WRX TR (SGM)
89 MR2 (Ice Blue)

Default

Quote:
Originally posted by Fred
Got a question for the brainiacs - how much contact patch would you give up by decreasing the diameter & width of the wheel? Would that cancel out the (slightly) quicker acceleration? It seems to me that you'd want to maximize the grip, instead of going for acceleration...
True, but you don't HAVE to decrease the width of the wheel just because you drop diameters (though it's harder to find wide small wheels). I mean you could always run a 15x7.5" Volk TE37 with 225/50-15s if you wanted (which I would in a heartbeat, if I had the cash).

The only reason I ran the 195/50-15 and 15x6 combo was availability and price. Since it looks like I'll be picking up your RS rims (16x7), I'm probably going to run a 205/45-16 or 225/45-16 next season, instead.

And, yes, 15s are a LOT cheaper than 16s or 17s. That's another plus for going that route.

Shane -- http://www.warpthree.com
STS 729
Warp3 is offline   Reply With Quote
Old 11-17-2002, 02:23 PM   #13
Burnout
Scooby Specialist
 
Member#: 4721
Join Date: Mar 2001
Chapter/Region: South East
Location: Asheville
Vehicle:
2002 2.5 RS
1997 Brighton

Default

Quote:
The only reason I ran the 195/50-15 and 15x6 combo was availability and price.
Quote:
And, yes, 15s are a LOT cheaper than 16s or 17s. That's another plus for going that route.
This is the main reason Iím thinking of going with a 15.

I also run at the track and believe I could probably drop three tenths just by loosing the weight and the shorter gearing of the combo, maybe even a little bit more.

What is the diameter difference between the 225/40/18 and the 205/50/15?
Burnout 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
Dedicated autocross tires and for autocross only. cid369 Tire & Wheel 16 01-11-2012 09:43 PM
I'm going to be getting tires and rims in next 2 weeks *help* blackout801 Rocky Mountains Impreza Club Forum -- RMIC 7 08-31-2008 08:12 PM
Autocross tires and rims CNC Scott Tire & Wheel 18 08-14-2007 04:55 PM
Help me get tires and rims!!! seasons Tire & Wheel 9 05-17-2004 08:47 PM
need help on tires and rims WReX_rated Bay Area Impreza Club Forum -- BAIC 11 08-16-2002 07:59 PM


All times are GMT -4. The time now is 07:34 PM.


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.