ENGINE
10.
Drive
pulley,
4352 11
601
This
pulley
has
the
following dif-
ferences f rom the stock
version:
(1)
The
material is
aluminum
alloy
to
reduce
weight and
rotating
inertia.
(2)
The oil seal lip's contact area
has
been
treated
for
wear re-
sistance.
(3)
The diameter
is
90
mm.
1 1.
Flywheel, 4352
1
1 755
This flywheel is fabricated from
steel but
is
significantly lighter
than stock
to reduce rotating
in-
ertia.
12. Needle
bearing, 082278 184
The needle
bearing
has
a
higher
load
capacity to withstand
severe
clutch engagements.
C.
Intake
and exhaust
group.
1. Intake
manifold,
4352 13 100
This
manifold has
the following
features:
(1)
lt is cast from aluminum
alloy.
(2)
lt has
been designed to accept
and
work with the DDW 48lDA
carburetor.
and
to
match
an
engine
installation
angle of
4"40'.
(3)
The
length
of
the intake
pas-
sages
has
been determined
for optimum tuning and effi-
ciency at
the
designed engine
speeds.
2. Gaskets,
rotor housing
to
intake
manifold:
086278205
intake manifold to
carburetor:
.
086278206
3. Carburetor support,0862
78240
This
support
reduces the transfer
of
engine
vibrations to the
carbur-
etor and
thereby
prevents
fuel
surging and bubbling.
4. Exhaust
header
and
pipe,
header:
435278 250
pipe:4352
78260
Some of the
main features of
exhaust system are:
(1)
Both the header and
pipe
are
fabricated from stainless steel.
(2)
The header
is
a tubular design,
and the
pipe
terminates in
a
megaphone.
(3)
The
header
and
pipe
are
join-
ed by a sliding
connection to
allow
for engine
vibration
and
movement.
5. Exhaust
system
support
brackets
See
page
10 for
details.
D.
Lubrication
group.
1. Oil
pump,
1058 78
220A
The shaft
and
rotors in
the com-
petition
oil
pump
are more resis-
tant to wear and seizing.
Oil
pressure
regulator
assembly,
4352 14
250
This regulator
will
maintain
oil
pressure
at
6.5
-r
0.5
kg/cm'.
Engine oil
cooler, 1058 78
180
This
larger-than-stock
cooler will
increase
cooling capacity
by 50
percent
over
stock.
E. Cooling
group.
1. Water
pump,4801
15
010
The competition water
pump
is
aluminum alloy.
Water
pump pulley,4801
15151
To
reduce
weight this
pulley
is
made from
aluminum alloy, and
its larger-than-stock
130 mm
dia-
meter
will
enhance V-belt
life
and
reduce
the
speed of
the
water
pump.
Radiator, 1058 78 190
The
aluminum alloy
competition
radiator's larger
core will
increase
engine cooling capacity
by 60
per-
cent
over stock.
V-belt, 1058 78 154
This
notched V-belt is more resis-
tant to
heat.
stretch and
vibration.
F.
Electrical system.
1. lgnition coil,4801
1B 100
This
higher output coil
is
exclu-
sively
designed for
use
with the
Mazda competition
capacitive dis-
charge
ignition
(CDl).
2.
High tension wires,
coil-to-distributor: 4352 1B 110
distributor-to-spark
pl
ugs:
4801 1B 150
These
high
tension wires
have
a
metal wire
core to
reduce voltage
drop.
3.
Distributor,4B0l
1B 200
These are the
main
features of the
distributor:
(1)
lt
is
breakerless,
having
a
magnetic
trigger.
(2)
There is no
advance
mechan-
ism.
2.
3.
2.
3.
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