Race Car Tech Discuss anything related to road racing and auto X.

AutoX Tire/Wheel Choice

Old 10-26-04, 08:27 PM
  #1  
Full Member
10 Year Member
Thread Starter
 
Join Date: Oct 2001
Location: Long Island, NY
Posts: 127
Likes: 0
Received 0 Likes on 0 Posts
AutoX Tire/Wheel Choice

I plan on autocrossing my NA 89 RX-7 this up coming season. I am looking for opinions as to which of 2 tire and wheel choices would be most beneficial. I'm not interested in being in a particular class, just my time vs. others. I don't care about classification rules.

Choice 1 : Stock 15*6 (16 lbs) with 225/50/15
Advantages: Lower gearing due to smaller diameter
Reduced tire weight
Disadvantages: Narrow wheel


Choice 2 : SSR 17*7.5 (14 lbs) with 225/45/17
Advantages: Larger overall contact patch
Less wheel weight
Wider wheel
Shorter sidewall
Disadvantages: Taller gearing
Higher tire weight

I think the reduced weight and lower gearing of the 15" combo is my best bet despite the narrow wheel. Tips? Advice? Thanks in advance.
LI FC Greg is offline  
Old 10-26-04, 11:07 PM
  #2  
Full Member
5 Year Member
 
grafddrx7's Avatar
 
Join Date: May 2003
Location: Bowling Green, Ohio
Posts: 77
Likes: 0
Received 0 Likes on 0 Posts
I would suggest splitting the middle...

Maybe go with 15*7 front, with a 15*8 rear... Watch the offsets to prevent rubbing issues.

I'd probably go 205/50 on front and 225/50 on the back... Pretty decent contact patch, and since NA's don't have an abundance of torque, the reduced unsprung weight (if you wheel-shop wisely...) will definitely help accelerating out of corners.

With a relative lack of torque, it's possible to over-tire the car... You need a little wheelspin at the start to keep the engine from bogging, and you can actually use a slight lack of grip from a not-so-wide tire to help the car rotate thru tight turns.

For wheels, you can pick up pretty cheap, light wheels from Kosei, Rota and a couple others.

Hopefully I haven't sent you down the wrong road... This is just some stuff I figured out on my 88 GTU before I blew it up...

Good luck, and have fun!!!
grafddrx7 is offline  
Old 10-27-04, 06:59 AM
  #3  
Lives on the Forum
15 Year Member
 
DamonB's Avatar
 
Join Date: Feb 2001
Location: Dallas
Posts: 9,617
Likes: 0
Received 0 Likes on 0 Posts
If you're only concern is outright laptime your choice is simple. Get the widest wheels with the widest rubber that will fit. Wider tires will outrun narrower tires everytime.
DamonB is offline  
Old 10-27-04, 01:10 PM
  #4  
^^rotard for life^^
10 Year Member
iTrader: (3)
 
rob81gsl's Avatar
 
Join Date: Sep 2004
Location: Orlando
Posts: 906
Likes: 0
Received 0 Likes on 0 Posts
check out diamond racing wheels. they are cheap so you can buy a couple of sets and see what you like. and they are descently light. i'm autoxing with 13x7's on my fb with some STICKY tires and i have no complaints. they are kinda old school style, i haven't seen any on a FC but i have seen numerous on fb's and they look great if you get the right style.

www.diamondracingwheels.com/
rob81gsl is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
renjiv2
3rd Generation Specific (1993-2002)
55
04-24-16 04:09 PM
He's On Toroids
NE RX-7 Forum
48
10-19-15 08:58 PM
Ian_D
Single Turbo RX-7's
25
10-14-15 12:31 PM
msilvia
3rd Generation Specific (1993-2002)
15
09-11-15 12:13 PM


Thread Tools
Search this Thread
Quick Reply: AutoX Tire/Wheel Choice


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: