How bad do you want to check your bump steer?

[ssray]

This is probably more for the racing arena but I’ll throw it out FWIW.

Intercomp bump steer gauge

 

[Broncobowsher]

Piece of scrap metal, I like angle iron.
Clamp one side to the tie rod, the other to the axle tube. Big vice grips, maybe a C-clamp.
Unbolt the front shocks.
Bounce the front up and down.
The more the steering wheel cycles as it bounces, the worse the bump steer.

 

[ssray]

Piece of scrap metal, I like angle iron.
Clamp one side to the tie rod, the other to the axle tube. Big vice grips, maybe a C-clamp.
Unbolt the front shocks.
Bounce the front up and down.
The more the steering wheel cycles as it bounces, the worse the bump steer.

6$ vs 600$ …. Yup, I think I like that idea!

 

[m_m70]

6$ vs 600$ …. Yup, I think I like that idea!

Love it. Reminds me of why I joined this site so long ago......

 

[ssray]

Love it. Reminds me of why I joined this site so long ago......

Low budget, high budget, it’s all here with lots of good folks!

 

[m_m70]

Low budget, high budget, it’s all here with lots of good folks!

Agreed..................

 

[Yeller]

I draw the points on the floor then draw the arcs, soap stone or chalk works best

In all seriousness it’s a great tool, I’ve used one (do not own one) but even with it still wound up drawing it on the floor to fix it. Really helpful chasing drivability issues on race cars.

 

[nvrstuk]

Good stuff for sure!

 

[Speedrdr]

I draw the points on the floor then draw the arcs, soap stone or chalk works best

I was following fairly well with the angle iron and all that process…and then you kinda lost me when you started talking about drawing arcs on the floor.

Randy

 

[ssray]

I was following fairly well with the angle iron and all that process…and then you kinda lost me when you started talking about drawing arcs on the floor.

Randy

Well, me too. I’m thinking about it in the vertical plane and the relationship between the track bar and drag link. I ran across this when looking at their digital inclinometer. The bump steer tool doesn’t look like there’s much to it but maybe it has some pricy angle finding tidbits on it to measure actual wheel angle?

 

[Yeller]

I was following fairly well with the angle iron and all that process…and then you kinda lost me when you started talking about drawing arcs on the floor.

Randy

Well, me too. I’m thinking about it in the vertical plane and the relationship between the track bar and drag link. I ran across this when looking at their digital inclinometer. The bump steer tool doesn’t look like there’s much to it but maybe it has some pricy angle finding tidbits on it to measure actual wheel angle?

Drawing the points on the floor at ride height, then drawing arcs on the axle end to see how parallel the arcs are through suspension travel.

@nvrstuk has some nice pics in his 500 page build thread, if we didn’t banter and hi jack it it might only be 40, joking of course

 

[pcf_mark]

Some people got a little lost but is because you have to look at the problem from above not from the front. You need to imagine as the wheel moves up and down as viewed from the front the entire wheel/tire is moving in an arc due to how it is attached to the vehicle. While it is moving up and down in this arc the due to a wide variety of issues in the steering, as viewed from the TOP the front of the wheel will move and left and right as it you were steering the vehicle. Wheels go up and down causes the wheel to pivot on the steering points causing un-=intended steering or bump steer.

 

[Speedrdr]

Some people got a little lost but is because you have to look at the problem from above not from the front. You need to imagine as the wheel moves up and down as viewed from the front the entire wheel/tire is moving in an arc due to how it is attached to the vehicle. While it is moving up and down in this arc the due to a wide variety of issues in the steering, as viewed from the TOP the front of the wheel will move and left and right as it you were steering the vehicle. Wheels go up and down causes the wheel to pivot on the steering points causing un-=intended steering or bump steer.

That helps immensely! Never thought about it being the view from above. Still think I’ll go back through nvrstuk’s build thread and peruse it in its entirety…and I may possibly be part of the hijacking.

Randy

 

[Speedrdr]

Well, me too. I’m thinking about it in the vertical plane and the relationship between the track bar and drag link. I ran across this when looking at their digital inclinometer. The bump steer tool doesn’t look like there’s much to it but maybe it has some pricy angle finding tidbits on it to measure actual wheel angle?

Pricy inclinometers, indeed!