HDK Bump Steer 101
Since I posted the HDK "no camber change" photos on this site
there have been numerous queries regarding bump steer readings
on the HDK.
This week, I fitted a new power steering rack equipped HDK into
a mock-up rig to take some measurements.
I bolted an adjustable reference arm to the RF unit body rail and
clamped a straight edge to the surface of the brake rotor. Then
with the suspension at different compression heights, I used an
angle guage to measure the tow change (bump steer) at all points
throughout the suspension travel.
The result? Virtually no toe change at any point in the suspension travel arc
of from 10" compressed to 15.5" fully extended (5.5" at the shock which
equates to 6-7/8" at the tip of the spindle).
Since I posted the HDK "no camber change" photos on this site
there have been numerous queries regarding bump steer readings
on the HDK.
This week, I fitted a new power steering rack equipped HDK into
a mock-up rig to take some measurements.
I bolted an adjustable reference arm to the RF unit body rail and
clamped a straight edge to the surface of the brake rotor. Then
with the suspension at different compression heights, I used an
angle guage to measure the tow change (bump steer) at all points
throughout the suspension travel.
The result? Virtually no toe change at any point in the suspension travel arc
of from 10" compressed to 15.5" fully extended (5.5" at the shock which
equates to 6-7/8" at the tip of the spindle).