BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Suspension | Brakes | Chassis
 
Lux Angel Eyes
Post Reply
 
Thread Tools Search this Thread
      03-14-2013, 09:44 PM   #1
yz490
Enlisted Member
 
Drives: 08 E90
Join Date: Nov 2010
Location: Washington DC

Posts: 44
iTrader: (0)

Too much rear toe?

I recently upgraded to a 275/35/18 square setup, and just had the car aligned today. I had them pull the pins, and asked them (At Speed Motorsports, Baltimore MD) to give the car as much negative camber as possible and set it up with neutral toe. The car is now at -1.5 up front on both sides with 0.00 degrees toe, and -1.6 both rear, but with A total rear toe of 0.40 degrees, 0.20 per side.

Looking at about a million posts in the last hour, it seems that I might have been a bit hasty in thinking that neutral rear toe was the way to go: perhaps a tiny bit of toe-in might keep me from killing myself, and my shop may have simply assumed as much. But is 0.40 degrees total rear too much? Will this hamper turn-in or the ability to rotate the car?

Thoughts?

Last edited by yz490; 08-11-2013 at 06:40 PM.
yz490 is offline  
0
Reply With Quote
      03-18-2013, 02:22 AM   #2
HP Autosport
BimmerPost Supporting Vendor

 
Drives: E82 1M
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Quaife, Stoptech, Vorshlag

Posts: 10,914
iTrader: (29)

A little rear toe-in can help generate slip angle and thus cornering force. However, too much rear toe-in can cause some instability in corner entry and may cause the rear to slide.
HP Autosport is offline   United_States
0
Reply With Quote
      03-18-2013, 08:48 AM   #3
yz490
Enlisted Member
 
Drives: 08 E90
Join Date: Nov 2010
Location: Washington DC

Posts: 44
iTrader: (0)

So is 0.20 degrees to in both sides too much for this car?
yz490 is offline  
0
Reply With Quote
      03-18-2013, 11:43 AM   #4
HP Autosport
BimmerPost Supporting Vendor

 
Drives: E82 1M
Join Date: Mar 2007
Location: Santa Barbara, AP, Brembo, GIAC, Koni, Ohlins, Quaife, Stoptech, Vorshlag

Posts: 10,914
iTrader: (29)

Quote:
Originally Posted by yz490 View Post
So is 0.20 degrees to in both sides too much for this car?
On E9x M3, 0.20 each side is too much, you should be at no more than 0.20 total toe-in.
HP Autosport is offline   United_States
0
Reply With Quote
Post 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 10:08 PM.




m3post
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