Mazda RX-7 - CHASSIS;STEERING AND SUSPENSION; Description and Explanation of Competition Parts

CategorY
tem
Comp.
spec.
Stock
spec.
Remarks
Steering
Steering
wheel
same
as
stock
380
mm
dia.
Steering
gear
14.5:1
17-2O:1
-inkage
same
as
stock
Front
suspension
)oil
spring
'ate
3.4
kg/mm
1.9
kg/mm
f
ree
length,
comp:252mm
stock:338
mm
\nti-roll
bar
25
mm
dia.
23
mm
dia.
comp.
location:
1
=2.92i2
-
2.79;
3=2.65;
4=2.53
jhock
lbsorber
adjustable
Piston
rod.22
mm
dia.
non-adlust.
Piston
rod.20
mm
dia.
max.length/travel,
comp:540/145
stock:5961177
3ump
stoP
30
mm
ht.
40
mm
ht.
(nuckle
arm
reinf
orced
Rear
susPension
)oilspring
ate
3.2
kg/mm
2.0
kg/mm
f
ree
length,
comp:
278;
stock:
31
5
ihock
rbsorber
adiustable
non-adjustable
max.
length/travel,
comp:5221168
stock:548/190
{nti-rollbar
19
mm
dia.
1.5 kg/mm
18
mm
dia.
1.2
kg/mm
lump
stop
37.5
mm
ht.
52.5
mm
ht.
CHASSIS/STEEHI
NG
An
r--i $
U
SiPEN$tlO
N
CHASSIS'STEERING
AND
SUSPENSION
Specificatiorle
l.
DescriPtion
and
ExPlanation
of
ComPetition
Parts
A.
Steering.
1. Steering
gearbox.
for
right-hand
drive:
4352
BO
030
for
left-hand
drive:
435232920
3.
This
gearbox
has a
quicker ralio
of
14.5:1.
Compared
to
the
stock
unit,
they
have
less
travel.
They
are
adjustable
to allow
for
chassis
tuning.
(2)
(3)
B.
Front
susPension.
1.
Coil
sPring,
4352
34
01
1
To
lower
the
car,
reduce
roll
when
cornering
and
Pitch
when
brak'
ing,
this
is
a shorter,
stiffer
spring'
Tht
design
details
are
as
follows:
Competition
Stock
Wire
diameter
(mm)
12
12
Free
length
(mm)
252
338
Spring
rate
(kg/mm)
3.4
1.9
2.
Strut
assemblY,
R: 4352
34
91
0
L:435234920
(1)
The
damPening
characteris-
tics
of
these
shocks
have
been
selected
for
racing
PurPoses.
(4)
The
knuckle
sPindle
is strong-
er
for
increased
durabilitY
and
safetY.
Bump
stops,
435234111
To
retain
sufficient
susPension
travel
with
the
lowered
ride
height
of
the shorter
sPrings,
the
bumP
stops
are
shorter
than
stock
bY
10
mm.
Anti-roll
bat,4352
34
151
The
details
of
this
larger
bar are
as
follows:
AdditionallY,
this
bar
has
four
positions
for
the
connecting
link,
providing several
combinations
of stiffness
and
allowing
ease
of
chassis
tuning.
5.
Lower
arm
assemblY,
R:
4352
34
300
L:4352
34 350
4.
Competition
Stock
Diameter
(mm;
25
23
Rate
(kg/mm)
2.75
2.O
39