bump steer kit

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Ron Gusack
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bump steer kit

Post by Ron Gusack » Thu Aug 28, 2014 1:48 pm

I put a bump steer kit on my 70 Nova and the alignment guy adjusted it as close to the steering knuckle as he could but said it needed to be even closer. He said a stock tie rod end would be better for my car. Anybody run into this situation before?
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MadBill
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Re: bump steer kit

Post by MadBill » Fri Sep 05, 2014 11:07 pm

A typical bump steer kit can only move the pivot point in one direction (usually down), which may or may not be what's required. Moving the inboard end of the tie rod down does the same thing as moving the outer end up, so if the kit will fit at the inboard end, just use it there.

Not that I recommend it, but I've seen a big hammer used to 'adjust' the height of the steering arm... :roll:
Here's a useful link from another S/T thread: http://www.pozziracing.com/
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Re: bump steer kit

Post by justahoby » Wed Sep 10, 2014 1:44 pm

I had a bump steer issue in my truck with different spindles,and it was very annoying chirping of tires over railroad tracks and stuff. When I lowered it with springs it went away with the angles changing with the lower A frame and tie rod. Also I made my tie rods more even to help eliminate some...It took a long time to figure out what was better.
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HotRodRay
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Re: bump steer kit

Post by HotRodRay » Tue Sep 12, 2017 9:13 pm

Guessing wont work. Which is what happens when you duplicate somebody elses changes.

There is really no substitute for actually measuring one front wheel, and adjusting as necessary. (Both should be identical)

It is not tough, but takes a little understanding as to how its done.

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Re: bump steer kit

Post by pitts64 » Wed Dec 27, 2017 7:44 am

That Nova is rear steer.. Give it more positive caster.. I like around 6 positive..

dave brode
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Re: bump steer kit

Post by dave brode » Wed Dec 27, 2017 8:31 pm

Fyi, the Dave Morgan book has a very good section on plotting bumpsteer on graph paper, using straight edges on the rotors, and two plumb bobs. It has a chart on what to do with each scenario. The Herb Adams book is also an excellent resource, and taught me a great deal about front end and steering geometry.

I've seen guys drill the steering arm and bolt the heim right tight to the arm.

Fwiw, I'm "trying" to build an Opel GT [goal to have it done when I retire in '19]. I found a Pinto rack was way too wide. I had it narrowed, and although I have a tad bit of camber change, I was able to get zero bumpsteer. With the rack at the proper width and height, moving the rack up or down 1/16" of an inch results in bumpsteer.

Dave
p.s. - ditto on the positive caster, but bumpsteer is dangerous, regardless of caster.

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