mmzh351

So I got the new spindles and thought I would take a few pictures and measurements before I put it back together.
 
ZH spindle on the left, later model XD/XF on the right.
 


 
So the later model spindle is about 10mm taller between the ball joints and the steering arm is shorter and more in board.
 
See below for overall height, old one first, newer one second.
 


 
So what does this all mean?
Increased distance between the balls joints should improve the camber curve, as it will have a similar effect to dropping the upper control arm pivot point, aka the "Shelby" mod.
 
Shorter steering arm should speed up the steering rate. Having the pick up point more in board will increase the amount of Ackerman in steering geometry, which is in line with the requirements of a more modern radial tyre.
 
Happy days.

So I got the new spindles and thought I would take a few pictures and measurements before I put it back together.
 
ZH spindle on the left, later model XD/XF on the right.
 


 
So the later model spindle is about 10mm taller between the ball joints and the steering arm is shorter and more in board.
 
See below for overall height, old one first, newer one second.
 


 
So what does this all mean?
Increased distance between the balls joints should improve the camber curve, as it will have a similar effect to dropping the upper control arm pivot point, aka the "Shelby" mod.
 
Shorter steering arm should speed up the steering rate. Having the pick up point more in board will increase the amount of Ackerman in steering geometry, which is in line with the requirements of a more modern radial tyre.
 
Happy days.

10mm at the ball joints would be less than 5mm difference at the spring.
Might actually measure where the 10mm is, could actually be that the lower ball joint is 10mm lower relative to the spindle line, which means no height difference when the car is on it's wheels.

So I got the new spindles and thought I would take a few pictures and measurements before I put it back together.
 
ZH spindle on the left, later model XD/XF on the right.
 


 
So the later model spindle is about 10mm taller between the ball joints and the steering arm is shorter and more in board.
 
See below for overall height, old one first, newer one second.
 


 
So what does this all mean?
Increased distance between the balls joints should improve the camber curve, as it will have a similar effect to dropping the upper control arm pivot point, aka the "Shelby" mod.
 
Shorter steering arm should speed up the steering rate. Having the pick up point more in board will increase the amount of Ackerman in steering geometry, which is in line with the requirements of a more modern radial tyre.
 
Happy days.

So I got the new spindles and thought I would take a few pictures and measurements before I put it back together.
 
ZH spindle on the left, later model XD/XF on the right.
 


 
So the later model spindle is about 10mm taller between the ball joints and the steering arm is shorter and more in board.
 
See below for overall height, old one first, newer one second.
 


 
So what does this all mean?
Increased distance between the balls joints should improve the camber curve, as it will have a similar effect to dropping the upper control arm pivot point, aka the "Shelby" mod.
 
Shorter steering arm should speed up the steering rate. Having the pick up point more in board will increase the amount of Ackerman in steering geometry, which is in line with the requirements of a more modern radial tyre.
 
Happy days.