Mazda RX-7 - Machining and Fabrication Operations and Procedures

ENGINE
4. lgnitor
and
lead
wiring,
ignitor:4801
18 800
lead
wiring:4801
18 870
This
fully
transistorized
ignition
will
provide
a
stable
secondary
voltage
at
high
engine
speeds.
The
lead
wiring
harness
is sPeci'
fically
intended
for this
ignition.
Alternator
and
alternator
straP,
alternator:399718
300
strap:4801
18 361
Alternator
pulley
part
number:
0833-78-1
53A
The
alternator
output
is
35
amPs,
and
its
pulley
diameter
is 75
mm.
Starter
stay,4352
1B
401
spacer,
'1281
17
383
The starter
stay
reduces
vibration
and
prevents
possible
breakage
of the
transmission
case.
Note:
When
installing
the staY,
the
spacer
must be
inserted
between
the stay
and
the starter
motor.
Spark
plug,
4352
18 600
The
heat
range
of
this
Plug
is 11.5,
which
is colder
than stock.
Fuel
pump,
4352
1B 250
This
fuel
pumP
has
an
outPut
of
100
liters/hour.
Two
of
them
are
needed
to satisfY
the
racing
en'
gine's
minimum
fuel
flow
require-
ment
of
180
liters/hour.
ll.
Additional
Required
Parts.
These
Parts
must
be
acquired
from
outside
sources.
1. Carburetor.
This
engine
uses'a
Weber
48lDA
of the
following
sPecifications:
2.
Tachometer.
We
recommend
using
a
mechan-
icaltachometer.
Temperature
gauges.
Minimum
requirements
include
water
and
oil
temPerature
gauges.
Oil
pressure
gauge.
We
recommend
a
mechanical
gauge
of
the
Belden
tube
tYPe.
5.
6.
3.
4.
7.
8.
lll.
Machining
and
Fabrication
Opera-
tions
and
Procedures
A.
Fabrication
of
oil
separator
tank.
1.
Use
the
stock
oil
filler
PiPe.
2.
The
original
filler
pipe
is
too
long
and
must
have a
40
mm
section
removed
from
the
middle.
Cut
it,
reweld
and
drill
holes
as shown
in
the
illustration.
3.
Fabricate
the
tank
as
shown,
and
weld
it to the
filler
PiPe.
4.
After
welding,
check
for anY
Pos'
sible
oil
leaks.
Eore
x Venturi
(mm)
48x43
Emulsion
tube
F-8
Main
iet
fi230
Main
air
corrector.iet
#1 30
ldle
jet
#80
ldle air
corrector
iel
#120
Accef
erator
nozzle
#50
Needle
& seat
#300
Float
level
21-23
mm
from
the
upper
surface
of the
float
chamber.
ii
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