New guy confused by suspension terms

[rusty63ss]

I am all new to changing suspension and do not understand what some of the terms mean. I understand some of this stuff like instant center, roll center. But some for instance;

Bump
Bump scrub

What does this mean and why is it important?

Thanks for educating the new guy.

Dhamen

[jay72nova]

The common use of bump is simply when you suspension is "absorbing in its travel" like when A arms go up to absorb a possom in the road. I don't know what bump scrub is. I could guess but I won't

[rusty63ss]

Originally Posted by jay72nova

like when A arms go up to absorb a possom in the road.

I hope to never collect one with my Nova but that is funny.

Thanks for the reply and helping me understand another term. I am sure there will be more.

[jay72nova]

Originally Posted by rusty63ss

I hope to never collect one with my Nova but that is funny.

Thanks for the reply and helping me understand another term. I am sure there will be more.

yeah...it happens..

just to take a guess on bump scrub ..would it be your scrub line at full bump?

so whatever parts on the headers engine chassis hangs down lowest creates your scrub line and whatever that would be at full bump could be your bump scrub?...just thinking outloud here....

[pragmatist]

Bump scrub is another name for bump steer. No, we are not talking cows here. If your suspension is not fully maxed out one of the problems you may encounter is bump steer. When a wheel goes though it's travel if the inner and outer tie rods for the steering are not placed in the proper location the wheel will actually change direction as it goes through the bump. This is a most unsettling feeling and restricts your best efforts of achieving a fast ride. Usually only a few washers either raising or lowering the outer tie rod will correct the problem.

[jay72nova]

Originally Posted by pragmatist

Bump scrub is another name for bump steer. No, we are not talking cows here. If your suspension is not fully maxed out one of the problems you may encounter is bump steer. When a wheel goes though it's travel if the inner and outer tie rods for the steering are not placed in the proper location the wheel will actually change direction as it goes through the bump. This is a most unsettling feeling and restricts your best efforts of achieving a fast ride. Usually only a few washers either raising or lowering the outer tie rod will correct the problem.

ahhh...weird name for it