Register or Log In To remove these advertisements. |
|
|
|
Thread Tools | Display Modes |
|
07-10-2019, 03:39 PM | #1 |
Registered User
Join Date: Sep 2015
Location: fergus falls mn
Posts: 116
|
bump steer after disc brake upgrade
68 c10. installed the cpp disc brake kit. stock height spindles. after installing the upper ball joint angle seems more aggresive than before. also im getting way more bump steer than before. also using cpp 3' drop springs in front, cpp sway bar, viking double adjust shocks. any ideas on how to remedy the bump steer? is it a mismatch of components? An alignment was done.
|
07-10-2019, 04:39 PM | #2 |
Post Whore
Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,362
|
Re: bump steer after disc brake upgrade
I recommend you move this to the suspension section. Where bigger brains than mine will see it.
Then my first question is did you only change the spindles and brakes and then problem appeared or did other components get changed or added at the same time and the problem appeared.
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
07-10-2019, 04:39 PM | #3 |
Registered User
Join Date: Dec 2017
Location: Elkhart, Texas
Posts: 1,844
|
Re: bump steer after disc brake upgrade
The shorter springs are the cause of the bump steer.. The shorter spring places the upper ball joint at a higher location in relation to the upper arm pivot shaft.. As the spindle travels up and down going over bumps, the camber angle and toe angle changes drastically, which translates to bump steer.. The solution is to go with stock or maybe 1" shorter springs and dropped spindles..
|
07-10-2019, 05:25 PM | #4 |
Senior Member
Join Date: Dec 1999
Location: TX
Posts: 1,624
|
Re: bump steer after disc brake upgrade
Is it possible you swapped the upper control arm side to side? The other thing that comes up is the center steering link can be put in backwards. Post some pictures of your setup.
|
07-10-2019, 11:35 PM | #5 |
Registered User
Join Date: Mar 2012
Location: Hillsboro, OR
Posts: 286
|
Re: bump steer after disc brake upgrade
+1 on the possibility that you installed the center/drag link backwards. Been there, done that myself.
Jon |
07-12-2019, 12:16 PM | #6 |
Registered User
Join Date: Sep 2015
Location: fergus falls mn
Posts: 116
|
Re: bump steer after disc brake upgrade
control arms never left truck, drag link never left truck. truck has been lowered for 10 ish years on these springs with the drum brakes. i installed a full kit with spindles, rotors, tie rods, ball joints etc. its using the newer 73 plus style joints. the inner tie rod is on the back side of the drag link with the nut facing the front of the truck.
|
07-12-2019, 12:54 PM | #7 | |
Post Whore
Join Date: Feb 2016
Location: Portland Oregon
Posts: 11,362
|
Re: bump steer after disc brake upgrade
Quote:
What are you using for bump stops?
__________________
Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help. RIP Bob Parks. 1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo If it breaks I didn't want it in the first place The WMB repair thread http://67-72chevytrucks.com/vboard/s...d.php?t=698377 |
|
07-12-2019, 12:17 PM | #8 |
Registered User
Join Date: Sep 2015
Location: fergus falls mn
Posts: 116
|
Re: bump steer after disc brake upgrade
can and admin move this to suspension section if needed?
|
Bookmarks |
|
|