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Old 03-21-2012, 04:32 PM   #1
Shifter
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Default How much is too much....bump steer kit.

So I installed a bump steer kit along with aftermarket kmember, a arms, etc....

Here is what I came up with for minimum bump steer.


It's a lot of spacers, and that is a 6" bolt. There is roughly 3" of spacers there. Is this safe? It looks like a lot to me....

Thanks
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Old 03-21-2012, 05:01 PM   #2
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Default Re: How much is too much....bump steer kit.

Can you move the rack Up at all?
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Old 03-21-2012, 05:09 PM   #3
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Default Re: How much is too much....bump steer kit.

Deff not safe.those will flex and act like springs, causing high speed wobble issues.
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Old 03-21-2012, 05:18 PM   #4
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Default Re: How much is too much....bump steer kit.

if you have to have that much.. you are going to need to machine a piece of steel.. thread it on each end and use separate bolts for top and bottom. I dont have any pics of some ive had but usually out of 1" barstock.. cut to length.. flats cut in it for tightening.. and threaded. Drill out the spindle and use a bigger bolt in it too btw. just to help strengthen it. This way there is a big chunk of metal against the spindle to prevent deflection.
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Old 03-21-2012, 05:39 PM   #5
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Default Re: How much is too much....bump steer kit.

The rack needs raised
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Old 03-21-2012, 07:30 PM   #6
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Default Re: How much is too much....bump steer kit.

The rack is raised as much as possible.
I did drill the spindle, it's a 5/8 bolt.

I have access to a lathe so I can make a 1 piece deal if needed
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Old 03-21-2012, 09:22 PM   #7
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Default Re: How much is too much....bump steer kit.

I would be afraid of the steering arm in the spindle. I would move the rack at all costs.
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Old 03-21-2012, 09:33 PM   #8
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Default Re: How much is too much....bump steer kit.

I know I'm going to here that it's not legal' but I kow some cars that have the A-frame mounts lowered to get rid of some of that long spacer. I know you've already said you can't raise the rack, but if you could just raise it a little bit along with the mounts you would be alot safer. that picture scares me and its not my life or my car.
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Old 03-21-2012, 09:54 PM   #9
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Default Re: How much is too much....bump steer kit.

Something I've done before is make a brace that goes from towards the bottom of bump bushing and runnin up on a angle to the front hole in dust cover so put longer bolt in it and slide a peice of tubing over bolt put a nut on it weld apeice of 3/8 tubing between that bolt and the bottom last inch of ur bumpsteer bushing
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Old 03-21-2012, 10:30 PM   #10
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Default Re: How much is too much....bump steer kit.

I hate to say it and I always try to avoid it but had about a 5" spacer with a 5/8" bolt and the car even hit the wall and never had any issues with it breaking and had been 188 mph and never had a steering wobble or other problems.
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Old 03-21-2012, 10:33 PM   #11
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Default Re: How much is too much....bump steer kit.

Thanks for the input, quite frankly it scares me too....thus the reason for the post.

I put as much caster as possible in it, the c/c plates are shifted rearward Their maximum. I'm thinking about shifting it forward a bit so I'm at about the stock 2* or so, that will lower the front of the steering arm and close that gap some. I'm also going to machine some aluminum rack bushings to push the rack up as much as possible. (I have urethane offset ones now)

I'll update this as to how it goes!
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Old 03-21-2012, 10:35 PM   #12
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Default Re: How much is too much....bump steer kit.

Jake, interesting you say that....I sent a picture to an old fab buddy and he said "get the exact length you need, machine a one piece spacer out of 1" stock, use a 5/8 bolt and run it"

I still think I'm going to see what I can do to shorten that gap as much as possible.
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Old 03-21-2012, 10:53 PM   #13
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Default Re: How much is too much....bump steer kit.

Quote:
Originally Posted by Shifter View Post
Jake, interesting you say that....I sent a picture to an old fab buddy and he said "get the exact length you need, machine a one piece spacer out of 1" stock, use a 5/8 bolt and run it"

I still think I'm going to see what I can do to shorten that gap as much as possible.
Thats exactly what I do. I have an assortment I can use to get the bump where I want it then I machine an exact length steel spacer. A good tight hole in the steering arms is a must also.
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Old 03-22-2012, 12:22 AM   #14
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Default Re: How much is too much....bump steer kit.

It appears to be a fox mustang?

I think a Racecraft 2" drop spindle may help this situation.
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Old 03-22-2012, 01:00 AM   #15
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Default Re: How much is too much....bump steer kit.

got a guy with a 56 f-100 with a heidts mustang 2 that took a 3.25 inch spacer to fix the bump steer. thousands of miles with no problems. no wobbles or anything. cayon carved with it and all. seems like if you can move the rack great, if you cant and dont experience an issues it's chill. how much would the itre have to weigh to creat enough centrifugal weight to break a 5/8 grade 8 bolt?
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