Bad Bump Steer
#1
Bad Bump Steer
Hey guys, I gotta question for you guys. I am having some bad bump steer going on. It started doing it a little bit after I turned my T-Bars. But it really started doing it really bad after I got my new Tires and installed my Shakles and AAL's. I went up to 33's with the tires. Is there anything I can do to eliminate the Bump steer I am getting??
Thanx in advance.
Thanx in advance.
#3
#4
My alignment is good (I did have it checked and am within limits). I checked it first before I posted anything on it. I havent checked my tire pressures yet, I will do that today if I have some time. What should I be running on them?
It really started when I did the tires so I am guessing cause the added weight and size against the steering system might be causing it.
Is there a kit that is made to help out with the Bump steer?
It really started when I did the tires so I am guessing cause the added weight and size against the steering system might be causing it.
Is there a kit that is made to help out with the Bump steer?
#7
#8
Member
iTrader: (5)
Join Date: Jun 2007
Location: Grovetown, Ga
Posts: 650
Likes: 0
Received 0 Likes
on
0 Posts
Bump Steer is the term for the tendency of a wheel to steer as it moves upwards into jounce. It is typically measured in degrees per metre or degrees per foot.
On modern cars the front of the tire moves outwards, as the suspension is raised, a process known as the front wheels "toeing out". This gives roll understeer. The rear suspension is usually set up to minimise bump steer, where possible.
A typical value is two degrees per metre, or perhaps more, for the front wheels.
Excessive bump steer increases tire wear and makes the vehicle more difficult to handle on rough roads.
Solid axles generally have zero bump steer, but still have roll steer, in most cases. That is, if the wheels move upwards by the same amount, they tend not to steer.
Roll steer is an important part of the budget used to define a vehicle's understeer, known as a Bundorf analysis
#9
#11
My alignment is good (I did have it checked and am within limits). I checked it first before I posted anything on it. I havent checked my tire pressures yet, I will do that today if I have some time. What should I be running on them?
It really started when I did the tires so I am guessing cause the added weight and size against the steering system might be causing it.
Is there a kit that is made to help out with the Bump steer?
It really started when I did the tires so I am guessing cause the added weight and size against the steering system might be causing it.
Is there a kit that is made to help out with the Bump steer?
My dad is running 30psi with his 33x12.50x15's.
#13
#17
I Have bump steer It is not too bad though. My truck has the stiffest springs from the factory and my tires are 36 psi.
#18
Well, I checked the entire front end and everything is tight. I checked the tires and they all had 42 psi in them. I brought them down to 34 psi and when I get out in the truck again I will see if it is an better and if not, I will bump them on down to 30 psi and see if that is any better.
I really think that will help it alot. I will keep you guys posted on it next time I take the truck out, lol.
I really think that will help it alot. I will keep you guys posted on it next time I take the truck out, lol.
#19
#21
#22
What is "bump steer"?
Bump steer is a condition that happens when the suspension path (in this case of the upper and lower control arms) does not match the steering arch between the inner and outer tie rods. The tire will turn slightly (called “toe change”) as the suspension moves through it's travel. This results in wandering. All production cars have some small amount of bump steer.
Raising or lowering the car can place the suspension out of the intended toe curve and create bump. Older cars have shock towers that can be anywhere with regards to the upper arm location. It is possible that the tower could be out far enough to affect the steering geometry. A bump steer kit can correct the steering angle for matching the suspension movement.
Raising or lowering the car can place the suspension out of the intended toe curve and create bump. Older cars have shock towers that can be anywhere with regards to the upper arm location. It is possible that the tower could be out far enough to affect the steering geometry. A bump steer kit can correct the steering angle for matching the suspension movement.
Thread
Thread Starter
Forum
Replies
Last Post
LayingFrame89
Ranger Products, Company, & Member Reviews
34
12-01-2007 06:59 AM
ranger
General Ford Ranger Discussion
32
07-31-2007 11:50 AM