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Page 2
Issue 8002
REAR SUSPENSION INFORMATION
| Q |
What is the latest length of the rear springs and how are they measured? |
| A |
The designed laden length of the rear Spyder spring
is 11" plus or minus 1/8". The measurements should be taken from
the top of the spring to the bottom of the spring. The vehicle should be placed on level ground, no occupants,
spare wheel in place, boot space empty and 1/2 fuel load. Remember - measure
the spring only, not the rubber pad or lower spring seat. |
| Q |
Why is the laden length of the rear springs important? |
| A |
Because it has an effect on the camber angle of the rear wheels. Also,
the springs should place the dampers in the mid portion of their stroke.
On most road going sports cars, a minimum of 6" of rear wheel travel is
allowed - 3" of bump and 3" of droop. |
|
Q |
Will Two Spyder springs correct excessive negative
camber ( wheel leaning in at the top) ? |
|
A |
Not necessarily. Assuming a tie channel is fitted and
the radius arms are straight and in good shape, camber angles can be
affected by other factors. For example, the condition of the universal
joints, wheel and differential bearings and rear toe settings will also
influence the stance of the wheels. |
|
Q |
Can the conventional alignment equipment used at the
front of the vehicle, provide meaningful toe readings at the rear? |
|
A |
No, not with enough detail. Separate toe readings are required at the
rear and not a
collective reading at the front. |
|
Q |
Will new Spyder springs guarantee a correct laden length ? |
|
A |
Not always. Variations in the weight of the sprung
mass (bodyshell, contents and mechanical components) from car to car will
affect the laden length of the springs. |
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