Steering Rack and Mounting Modifications
The design of the suspension and steering is such that it
is impossible to eliminate bump steering completely on
the X1/9. However, raising the steering rack by the same
amount as the inboard suspension pick-ups will keep
bump steer from becoming a serious problem with the
lowered car. The required parts are part of PBS Kit
Number 9.
Remove the plastic bushing inside the right-hand end
of the steering rack and fabricate a new one from alu-
minum bar. Reassemble the steering rack. Be sure to
constrain the bushing from falling out by swaging over
the end of the rack tube or welding a retaining washer
on the end of the rack.
Fabricate the two new steering rack mounting
brack-
Steering Rack Brackets and Mounting Modification
ets per Drawings
8
and 9. These are used to move the steer-
ing rack up
2-112
inches and to provide a solid mounting
for the rack, rather than the stock rubber cushioned
mounting.
Cut a flat on the left hand steering rack mounting
boss to match the flat area on the left bracket.
The inner front
trunk skin must be cut in several
places, to provide access to the new rackmounting brack-
ets, to allow vertical motion of the connecting links be-
tween the rack and the steering arms, and to allow access
for adjusting the front toe. See the pictures for guidance.
Don't cut the battery box back more than necessary as
the floor must be left wide enough to support the air-
craft battery. All holes cut must be covered to comply
with the
G.C.R.
Install the steering rack after cutting a new hole for
the steering splined shaft to feed through into the driver
compartment. Cover the original hole.
Front Anti-Roll Bar
The rationale for a front anti-roll bar parallels that given
for the rear bar. The front bar in general should contrib-
ute more roll stiffness than the rear bar, particularly
with a mid-engined car, in order to preclude excessive
oversteering. The car is low enough that it is very difficult
to find adequate room for a bar and mounting brackets
under the front of
thc car. Thcrcfore, it is recommended
that the front anti-roll bar pass through the front trunk
compartment even though this creates a few problems.
The front bar is essentially the same as the rear one ex-
cept for diameter.
A
13/16 inch diameter front bar is
recommended if the suspension is modified as described
in this manual. PBS Kit Number
5
includes this bar.
Front Anti-Roll Bar Mounting Bracket
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