Mazda RX-7 - Machining and Installation Operations

CHASSIS/STEERI
NG AND
SUSPENSION
6.
7.
Knuckle
arm:
R:
4352
32 301
L: 4352
32
31
1
The
linkage utilizes
a
sPherical
rod
end
instead of
rubber
bush-
ings.
And
the
'knuckle
arm
is
stronger
and
has
been
redesign-
ed for
clearance
around
the
wheel
and
tire.
Tension
rod,4352
34
130
Bracket,
R:
4352
34 850
L:435234
860
To eliminate
longitudinal
compli-
ance
of
the
lower
control
arm
the
forward
end
of the
tension
rod
has a spherical
rod end
joint.
Crossmember,
4352
34 800
This
is the same
configuration
as
stock,
but
is stronger.
8.
Alignment
settings
for
front
sus'
pension:
3.
Rear
anti-roll
bar,4352
28
151
These
are
the design
details:
4. Rear axle
control
arms,
upper:4352
28 300
lower:435228200
The
lower arm
has
sPherical
rod
ends
instead
of
rubber
bushings.
The upper
arm
has
rubber bush-
ings to
prevent
interference
when
cornering
and
is
longer
than
stock.
5.
Watt
link assemblY,
f ateral arms:
4352 28
200
435228
400
center
link:
4352
28
450
The
connections
are
sPherical
rod ends
instead
of
rubber bush'
ings.
To allow
changing
the
roll
center.
the
center
link
has
two
mounting
positions.
6.
Bump
stop
rubber,435228320
To
retain susPension
travel de'
spite
the
lowered
ride height,
this
bump
rubber
is shorter
than
the
stock
version.
ll.
Machining
and
Installation
Oper'
ations.
A. Steering
linkage.
1. Reinforcement
of side
frame
rail
(gear-box
attachment
Poi
nt).
Fabricate
a steel
Plate
and
weld
to the side
frame
rail as
shown
in the
illustration.
This
will
in'
crease
the
rigidity of
the
steering
linkage.
C.
Rear suspension.
1.
Coil
spring,
435228011
This
spring
is
shorter
than
stock;
these are
details:
and
stiffer
the design
2.
Rearshock
absorber,
435228700
(1)
The
dampening
characteris'
tics
have been
selected
for
racing
purposes.
(2)
Compared
to
the stock
unit,
it
has
less
travel.
(3)
lt
is adjustable
to allow
chas'
sis
tuning.
Competition
Stock
Diameter
(mm)
19
18
Rate
(kg/mm)
1.5
1.2
Competition
Stock
Length
of uPPer
link
(mm) 413
247
Length
of
lower
link
(mm) 495
500
Competition
Stock
Camber
-
1
'30'
+1
Caster
30
4"
King
pin
inclination
14"
42'
10" 55
Toe-in
(mm)
O-out
0.5
3r3
Camber
of
fset
(mm) 84.2
38
Caster
trail
(mm)
14
19
Competition
Competition
Stock
Wire
diameter
(mm)
middle,
1 1.2
both
ends.9.0
10.2
Free
length
(mm)
278
315
Spring
rate
(kg/mm)
3.2
2.0