Sign In
Create Account
Possible dumb question ... Having seen mention of shimming the steering rack (between it and the sub frame), am I correct in asuming that the idea is to "elevate" the rack relative to the spindle to lessen the effect of bump steer?
If so, what is the fabrication method that's being employed?
Rick
Shimming steering rack question
Started by
Qik Nip
, 01-14-2011 02:57 PM
#1
Posted 01-14-2011 02:57 PM
Qik Nip
-
- SMembers
-
- 413 posts
Loose Member
- Location:Florence, Kentucky
- Region:Cincinnati
- Car Year:1990
- Car Number:60
2009, 2010 & 2011 SCCA Great Lakes Div. Reg. SM Champ
2006, 2009, 2010 & 2011 Cincy SCCA Reg. Driver of the year
Powered by: Stewart Engines
Set up by: RAFT Motorsports
SM: The safest race car in the world. It can just
barely kill you.
Back to top
Report
#2
Posted 01-14-2011 04:08 PM
tony senese
-
- SMembers
-
- 177 posts
Not racing bicycles again!!
- Location:Vermont, USA
- Region:Northeast
- Car Year:1997
- Car Number:99
Well, I am not an expert, but if my geometry is right, shimming will actually increase the bump steer. Raising the steering rack moves the inside end of the tie rod even MORE out of plane with the LCA than it already is. If you could lower the steering rack and shorten the tie rods enough you can eliminate the bump steer. I guess that is why the 99's front subframe is better than the NA and NB. I am sure Collins will let me know if I am wrong...... 
Phew...... that was a close one!
Tony Senese
NASA-NE SM Director
'06, '08, '11, '12, '13, '14
NASA-NE SM champ
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users
