E90Post
 


 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Tracking, Autocrossing, Dragstrip, Driving Techniques > SCCA STX Wheels & Tires for 330i



Reply
 
Thread Tools Search this Thread
      06-22-2012, 11:47 AM   #1
BigSkyBimmerfan
Private
BigSkyBimmerfan's Avatar
1
Rep
92
Posts

 
Drives: e90 330i
Join Date: Apr 2012
Location: Big Sky Country

iTrader: (0)

I had my first go at SCCA Solo this past weekend in my 330i and am hooked!



The car has a few upgrades which put it into ST, and the 275mm rears (Goodyear F1 Asyms on 19" Morr VS8.1's) bumped it into STU.

What I'd like to do is switch to the stock 18" wheels (style 162's which currently have Blizzaks on them) for now, with stickier tires, and reconsider the rims when whatever tires I choose are due for replacement.

If I use something at 265mm or less I will drop to STX and I think I'll actually be faster on 18's with stickier tires than the 240 treadwear F1's. I can go as low as 140 in STX.

My question is, does this sound like a reasonable budget-minded approach to get me into a lower class where I'd be more competitive? What is the anticipated performance impact of going from the current wheel / tire setup to what I've proposed? I really don't know how rim size / weight & tire width / compound interact on the track at this level.

Assuming this is a reasonable approach, any tire recommendations?

Thanks in advance for any feedback!

Edit: list of major mods...

- BMW Performance Exhaust & Intake
- BMW Performance Strut Brace
- Koni FSD/Eibach pro kit
- RPI Scoops
- Rogue SSK
- Goodyear F1 Asym. 245F/275R
- 19" Morr VS8 forged wheels
- M-tech aero kit
- Carbon fiber splitters/diffuser/spoiler
- Clutch Delay Valve delete
- BMW Performance electronic steering wheel
__________________
e90 330i with goodies.
Appreciate 0
      06-22-2012, 12:18 PM   #2
vwong
Lieutenant
vwong's Avatar
United_States
11
Rep
594
Posts

 
Drives: All Euro
Join Date: Jul 2007
Location: SoCal

iTrader: (3)

Send a message via AIM to vwong Send a message via Yahoo to vwong
I posted in the other thread. If you're planning on getting new wheels, I would maximize the allowance from the STX rules and go square 18x9 wheels with 265/35 tires. However, if you want to stick with your OEM wheels, then go for 235/40 front, 255/35 rear. Yokohama Neova AD08 would be my first choice, Dunlop Direzza Z1 Star Spec would be the second.

And since you mentioned that it was your first event, I would recommend you to get more seat time after you sort out your tire selection.
__________________
2010 Audi S4 6MT
2009 BMW 335i Coupe 6MT
YouTube Channel
Appreciate 0
      06-22-2012, 12:31 PM   #3
BigSkyBimmerfan
Private
BigSkyBimmerfan's Avatar
1
Rep
92
Posts

 
Drives: e90 330i
Join Date: Apr 2012
Location: Big Sky Country

iTrader: (0)

Thanks, I appreciate the advice. I understand that seat time is the most critical factor here, I just want to get my class figured out and an initial build set up out so I can start working on consistency without frequently changing things up.
__________________
e90 330i with goodies.
Appreciate 0
      06-27-2012, 03:11 PM   #4
Brian@bavarianx
Banned
United_States
77
Rep
2,268
Posts

 
Drives: E36 M3
Join Date: Feb 2011
Location: Brea, CA

iTrader: (8)

Send a message via AIM to Brian@bavarianx
Apex usually has great fitments available for autox. PM paintpro21 on here and he'll be able to answer all the questions regarding track wheels and tires.
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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


All times are GMT -5. The time now is 05:42 AM.




e90post
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST