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View Full Version : Correcting bumpsteer/inverting tie-rod/steering arms



Benn
28-09-14, 12:14 PM
Now my car is quite low. So i know my rack arms point up, but went i saw this pic i thought i need to correct this as they are at a angle that's funny. Which gives me a hell of a lot of bump steer.

Here the angle. (excuse the cars dirty)

http://img.photobucket.com/albums/v321/bennh/Car%20Updates%20July%202014%20on/IMAG0116_zps37fae2de.jpg (http://smg.photobucket.com/user/bennh/media/Car%20Updates%20July%202014%20on/IMAG0116_zps37fae2de.jpg.html)

So i want to swap my steering ball joints from top fit, to bottom (invert them) Now i know you can just drill them and bosh as they are a taped fit. So can i get them drilled and then just have a taper machined and pressed in?
I know a few people have done it, but never seen pics or a guide... Simon? Have you? I'm sure Rick did it too....

Any hints or tips?

Balley
28-09-14, 01:06 PM
Tapered cone drill lol? You may be able to get a drill to match the taper of the Ball joint, or you could use rose joints and fit the taper from the top like normal and bolt the joint on from the bottom.

Benn
29-09-14, 06:09 PM
Tbh im happy with normal ball joints.. so its just the drilling. Maybe if i give my machinest a ball joint and hub he can sort...

Rob H
29-09-14, 06:28 PM
Im almost certain my tre's come in from the bottom, maybe whoever did my conversion had the same problem as you. I just assumed they were all like that didn't even think twice about it lol. Ill have a look at it tomorrow and see hows its been done and report my findings.

Mieran
29-09-14, 06:41 PM
There is no point doing this if you're not going to correct your wishbone angle too.

Benn
29-09-14, 08:00 PM
Im almost certain my tre's come in from the bottom, maybe whoever did my conversion had the same problem as you. I just assumed they were all like that didn't even think twice about it lol. Ill have a look at it tomorrow and see hows its been done and report my findings.

Please, ive only heard of people doing. Never seen it done...


There is no point doing this if you're not going to correct your wishbone angle too.

Some one else has said the same, my arms arnt that bad really... would need bit ball joint spacers...

Iain
01-10-14, 03:49 PM
I looked into doing this at some point. I think Simon said he had inserts pressed into hubs but may be wrong.

I would be happy with a taper drilled into the bottom and finishing in the middle, and an insert pressed/clamped into the top so they could be fitted from the top or bottom easily. Never got quotes from a machine shop to do this though.

Don't get Compbrake rosejointed ones, they require much more modification than implied on their website (cut and shorten the steering arms etc).

Stuart
01-10-14, 04:05 PM
you could always do the rosejoint build yourself and get it right...

mowgli
01-10-14, 05:56 PM
basically Benn, it is steel, so it can be modified. re-tapering holes will be a doddle for a decent engineer.

the big problem is getting the geometry right, and I am in no way qualified or experienced in trying to design a decent setup that will work for you, I think it is either a good educated guess, or pay out for a specialist to design it.

Benn
01-10-14, 06:37 PM
I looked into doing this at some point. I think Simon said he had inserts pressed into hubs but may be wrong.

I would be happy with a taper drilled into the bottom and finishing in the middle, and an insert pressed/clamped into the top so they could be fitted from the top or bottom easily. Never got quotes from a machine shop to do this though.

Don't get Compbrake rosejointed ones, they require much more modification than implied on their website (cut and shorten the steering arms etc).

See that's what i was thinking/wanting to do. I think i might take a hub to my machinest and see what he says/can do.
I didn't really wanna go the rosejoint way.


you could always do the rosejoint build yourself and get it right...

Would it not be a case of buying rose joints and misalignment washers?


basically Benn, it is steel, so it can be modified. re-tapering holes will be a doddle for a decent engineer.

the big problem is getting the geometry right, and I am in no way qualified or experienced in trying to design a decent setup that will work for you, I think it is either a good educated guess, or pay out for a specialist to design it.

Why will geometry be affected?

Stuart
01-10-14, 07:14 PM
What are misalignment washers? Just bore the hole to a parallel one that suits a joint and fit with suitable bolt and spacer

mowgli
01-10-14, 09:09 PM
Benn, the bottom arm follows an arc, as does the steering rod.

the height of the suspension was factory designed to be the best compromise the engineers decided was good enough for 155r13 tyres on a 70hp car at std height.

you have way more hp, weight & grip on much lower suspension.t

he arms being run at a higher angle than before moves them inwards & affects the original geometry, as does the steering rod angle.

simply lowering the mounting of the steering rod will solve half of the problems, but unless you could come up with a way to raise the bottom arm mount, you won't completely solve the issues you have.

Iain
01-10-14, 10:44 PM
What are misalignment washers? Just bore the hole to a parallel one that suits a joint and fit with suitable bolt and spacer
Tapered washer for the RJ movement. Basically a posh spacer on the bolt.

Benn
03-10-14, 10:08 PM
Benn, the bottom arm follows an arc, as does the steering rod.

the height of the suspension was factory designed to be the best compromise the engineers decided was good enough for 155r13 tyres on a 70hp car at std height.

you have way more hp, weight & grip on much lower suspension.t

he arms being run at a higher angle than before moves them inwards & affects the original geometry, as does the steering rod angle.

simply lowering the mounting of the steering rod will solve half of the problems, but unless you could come up with a way to raise the bottom arm mount, you won't completely solve the issues you have.



Ah yes i get what your saying. Without a bloody big spacer or doing like Johnny has done to the hub, to get my arms straight.. so that might be something i have to live with for the time...

Tapered washer for the RJ movement. Basically a posh spacer on the bolt.

Think ill do like you and stu have suggested....

scott.parker
04-10-14, 05:53 PM
Didn't James (count vaux) raise the steering rack position up on the bulkhead? This would help solve the rack rods, but still leave the lower arm issue to solve..

Benn
05-10-14, 08:38 AM
He did, thats aLOT more work tho...