GENERAL
DATA
(MINI-COOPER
'8')
The following information is applicable to the
Mini-Cooper'S'
and should be used in conjunction with the preceding
specifications.
•
ENGINE
Number
of
cylinders
..
4.
Bore (all models) . .
..
2·780 in. (70,6 mm.).
Stroke: 970
C.c.
.. ..
2·4375 in. (61'91 mm.).
1071
C.c.
..
..
2·687 in. (68'26 mm.).
1275
C.c.
..
..
3·2 in. (81,33 mm.).
'Cubic capacity: 970
C.c.
..
..
59·1
cu. in. (970 c.c.).
1071
c.c.
..
63·35 cu. in. (1071 c.c.).
1275
C.C.
77·9 cu. in. (1275 c.c.).
Compression ratio: 970 c.c.
..
10:
1.
1071
C.C.
9·0 :
1.
1275
C.C.
9·75 :
1.
Capacity
of
combustion chamber (valves
and
sparking plug •
fitted) 1·306 cu. in. (21,4 c.c.).
B.M.E.P.: 970
C.C.
1421b.jsq. in. (9'98 kg.jcm.
2
)
at
4,500 r.p.m.
1071
C.C.
. .
143
lb.jsq. in. (10'05 kg.jcm.!)
at
4,500 r.p.m.
1275
C.C.
153
Ib.jsq. in. (10'76 kg.jcm.
2
)
at
3,000 r.p.m.
Torque:
970
C.C.
"
57
lb. ft. (7'88 kg. m.)
at
5,000 r.p.m.
1071
C.C.
62
lb. ft. (8'58 kg. m.)
at
4,500 r.p.m.
1275
C.C.
79
lb. ft. (10'92 kg. m.)
at
3,000 r.p.m.
Compression pressure 190
to
200 Ib.jsq. in. (13'36
to
14'07 kg.jcm.
2
)
at
500 r.p.m.
Engine idle speed 500 r.p.m. approx.
CRANKSHAFT
Main
journal diameter
Minimum regrind diameter
Main
bearings
Material
Length
..
Running clearance
,CONNECTING
RODS
Little-end bore diameter
:PISTONS
Type
Clearance: Bottom
of
skirt (pressure face)
Top
of
skirt "
PISTON
RINGS
Compression: Plain
Tapered
..
Width
..
Thickness
Fitting gap
Clearance in groove
Oil control type
Width
..
Thickness
Fitted gap
Clearance in groove
..
General
Data
14
2·0005
to
2·0010 in. (50'81
to
50·82 mm.).
1·9805
to
1·9810 in. (50,30
to
50·31
mm.).
· . Steel-backed copper-lead;
thin
wall.
1'000 in. (25,4 mm.).
·001
to
'0027 in. (,025
to
·068 mm.).
•
· . ·8110
to
·8115 in. (20,60 to 20·61 mm.).
Solid skirt.
'0019
to
·0025 in. (,048
to
·063 mm.).
·025
to
·0283 in. (,63
to
·72 mm.).
Top
ring.
..
Second
and
third ring.
..
·0459
to
·0469 in. (1'16
to
1·19 mm.).
· . ·116
to
·122 in. (29'4
to
30·9 mm.).
·008
to
·013 in. (,20
to
·33
mm.).
·0015
to
·0035 in. (,04
to
·09
mm.).
·1153
to
·1563 in. (3'94
to
3·96 mm.).
..
·116
to
·122 in. (29,4
to
30·9 mm.). •
·008
to
·013 in. ('20
to
·33
mm.).-
·0015
to
'0035 in. ('04
to
·09 mm.).
MINI. Issue
1.
4908
mk1-performance-conversions.co.uk
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