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Using rose joints on the end of the steering rack?
Northy - 28/10/14 at 11:08 AM

Does anyone know how this has been achieved?





Isn't the hole in a Cortina upright tapered?
I'm keen on working out how to do this so I can fit some wider wishbones easier, and play about with adjusting the bump steer

Thanks,

G

rodgling - 28/10/14 at 11:40 AM

I assume by using this kind of thing:

http://cbradleymotorsport.co.uk/suspension-steering/steering/steering/track-rod-end-rose-joint-adaptor-kit.html

Doctor Derek Doctors - 28/10/14 at 12:32 PM

What uprights do you have? I'm currently in the process of making up a kit to convert the Rally Design uprights to use rod ends on the steering rack to sell.

I was also thinking less than 1/2 the price of the CBradley kit as well!

Northy - 28/10/14 at 12:36 PM

I have proper 'ord fashioned Cortina uprights

What is different on the Rally Design uprights?

G

[Edited on 28/10/14 by Northy]

Doctor Derek Doctors - 28/10/14 at 01:06 PM

The Rally Design Uprights have a straight hole in the steering arm and then have a stainless steel insert with an internal taper to fit the smaller RS2000 track rod.

I make all the parts individually so if you like I could design and make you up a set to fit a standard Cortina upright.

coozer - 28/10/14 at 04:51 PM

Int bump steer all to do with the inner joint position on the rack gear? Not sure what using a different joint at the steering arm will help?

43655 - 28/10/14 at 05:55 PM

quote:
Originally posted by coozer
Int bump steer all to do with the inner joint position on the rack gear? Not sure what using a different joint at the steering arm will help?

'
If the rack can't be moved then moving the outer pivots to the correct position can help minimise bumpsteer
In the ideal design the ball-joint end of the steering rack is in line with the upper and lower wishbone pivots on the chassis
The tie rod should be at an angle whereby the UCA, LCA and it all intersect at the same point, as shown here

This will give no bumpsteer in a straight line

taken from
http://www.pro-touring.com/threads/90321-Wilwood-ProSpindle-and-bump-steer

Anyway in't the escort M14x2mm pitch? You could just use a female rose joint instead of the ball joint, no?
Also, what's wrong with standard ball joints? bit heavier but bound to last longer

coozer - 28/10/14 at 06:26 PM

Thats it, nice picture.

Northy - 28/10/14 at 06:26 PM

I thought that the steering arm should be parallel with the bottom wishbone to give zero bump steer.
The top wishbone affects camber change?

So therefore moving the outer joint up or down could help bumpsteer?

G

coozer - 28/10/14 at 08:06 PM

See how it lines up with the axle centre line? The steering arm is already designed with that in mind so making sure the rack is at the correct height would be thee first step.

43655 - 28/10/14 at 09:01 PM

quote:
Originally posted by Northy
I thought that the steering arm should be parallel with the bottom wishbone to give zero bump steer.
The top wishbone affects camber change?

So therefore moving the outer joint up or down could help bumpsteer?

G


Nope, becuase for example if you have the rack in line with the upper wishbone, the angle of the tie rod would be parallel to the UCA instead.

But yes, I'd guess that has the most effect on bumpsteer

Doctor Derek Doctors - 28/10/14 at 09:29 PM

Both rack height and outer ball joint position effect bumpsteer. And both can be corrected.