Mazda RX-7 - Comparison of Specifications RX-7 and RX-3 - Engine and Driveline; Appendix

APPENDIX
COMPARISON OF SPECIFICATIONS
RX-7 and
RX-3
(Engine
and
Driveline)
Engine
Basic
performance
specifications.
270 PS at
9000
RPM
Maximum torque
23 kg-m at 8000 RPM
Basic mechanical specifications.
Major
parts
specif
ications.
Rotor
housing.
Displacement 573 x 2(1146cc)
<-
Layout
two
rotors
<-
Compression
ratio
9.4:1
+-
lntake
system
peripheral
port
<-
Exhaust system
peripheral port +-
Carburetion
down draft Weber
<__
Lubrication
wet
sump
<-
Cooling system
water circulation
<_
lgnition
system
full transistor
CDI
point
dislrib.
Trochoid spec.
_
Rxa
=
l92lt____
improvement for
cooling
Rxa=101x
ntake
timing
l.O./1.C.
=
86"/75"
<-
Port shape
"D"
Port
Round Port
Exhaust
timing E.O./E.C.
=
73"/65"
.+--
Port shape EllipticalPort
<-
Spark
plug
location
and
hole diameter
T/L
=
30/18
TIL
=
4.2112
Side
housing.
Material/surf
ace
treat ment special cast
iron/gas nitrogen
special
cast iron
Intake
port
plugged
recluires
plugging
Ventilation 0.5
liter
oil separator tank
requires making
separator tank
Oilpan.
baf
f le
prevenls
loss
of oil
pressure
2
pcs (both
sides of
baffle
plate)
Conf
iguration
large capacity
with
baf f
le
plate
4T