Comparison Of Specifications Rx-7 And Rx-3 - Engine And Driveline; Appendix - Mazda RX-7 Service Manual

APPENDIX
COMPARISON OF SPECIFICATIONS
RX-7 and RX-3
( E n g i n e a n d D r i v e l i n e )
Eng i ne
Basic performance specifications.
2 7 0 P S a t 9 0 0 0 R P M
M a x i m u m t o r q u e
23 kg-m at 8000 RPM
Basic mechanical specifications.
Major parts specif ications.
Rotor housing.
D i s p l a c e m e n t 5 7 3 x 2 ( 1 1 4 6 c c ) <-
Layout
two rotors
<-
Compression ratio
9 . 4 : 1
+-
lntake system
peripheral port
<-
Exhaust system
p e r i p h e r a l p o r t +-
Carburetion
d o w n d r a f t W e b e r <__
Lubrication
w e t s u m p <-
Cooling system water circulation <_
l g n i t i o n s y s t e m f u l l t r a n s i s t o r C D I
p o i n t d i s l r i b .
T r o c h o i d s p e c .
_
Rxa = l92lt____
i m p r o v e m e n t f o r c o o l i n g
R x a = 1 0 1 x
n t a k e t i m i n g
l . O . / 1 . C . = 8 6 " / 7 5 " <-
Port shape
" D " P o r t
R o u n d P o r t
E x h a u s t t i m i n g
E . O . / E . C . = 7 3 " / 6 5 "
.+--
Port shape E l l i p t i c a l P o r t
<-
S p a r k p l u g l o c a t i o n
a n d h o l e d i a m e t e r
T/L = 30/18
TIL = 4.2112
Side housing.
Material/surf
ace treat ment
s p e c i a l c a s t i r o n / g a s n i t r o g e n s p e c i a l c a s t i r o n
Intake port
p l u g g e d
r e c l u i r e s p l u g g i n g
V e n t i l a t i o n
0 . 5 l i t e r o i l s e p a r a t o r t a n k r e q u i r e s m a k i n g
s e p a r a t o r t a n k
O i l p a n .
b a f f l e p r e v e n l s l o s s
o f o i l p r e s s u r e
2 p c s ( b o t h s i d e s o f
b a f f l e p l a t e )
C o n f i g u r a t i o n
l a r g e c a p a c i t y w i t h
b a f f l e p l a t e
4 T