General Specification - Triumph TR4 Workshop Manual

GENERAL SPECIFICATION
Engine
Number of cylinders
Bore of cylinders
. . .
(Special Order)
Stroke of crankshaft
Piston area .
(Special Order)
Cubic capacity .
(Special Order) .
Compression ratio . . . . . . . .
Valve rocker clearances—inlet and exhaust
Valve timing with valve rocker clearances se t
0 . 0165" (0 . 42 mm . )
Performance Data (Engine)
Nett . .
(Special Order )
Piston speed at 100 m .p .h . (top gear) . .
Lubrication (Engine)
Type of pump
Oil filter . . . . .
Release pressure
Ignition Syste m
Contact breaker gap
Spark plugs—Type
4
3 . 386" 86 mm .
3 . 268" 83 mm .
3 . 622" 92 mm .
36 .0 sq . in . 232 sq . cm .
33 . 5 sq . in . 216 sq . cm .
130 . 5 cu . in . 2138 c .c .
121 . 5 cu . in .
1991 c .c .
9 : 1
0 . 010" (cold) 0 .254 mm .
at Inlet and exhaust valves to be equally open at T .D .C . on
the exhaust stroke .
100 B .H.P. at 4,600 r .p .m .
Torque 1,520 lb in . at 3,350 r .p .m .
(Equivalent to 147 lb/sq . in . B .M .E.P .) .
100 B .H .P . at 5,000 r.p .m .
Torque 1,410 lb in . at 3,000 r .p .m .
(Equivalent to 145 lb/sq. in . B .M .E .P .) .
2,850 ft/min . at 4,800 r .p .m . (3 . 7 : 1 axle) .
. .
Hobourn-Eaton eccentric rotor .
. . Purolator ; A .C . Delco ; Tecalemit full flow (replaceabl e
element) .
70 lb/sq . in . 4 . 921 kg/sq. cm .
. . 0 . 015" 0 . 4 mm .
. . Lodge CNY (Normal road use) .
HN (High speed touring) .
2HN (Competition use) .
„ CN (Low octane fuel) .
Gap . . 0 . 025" 0 . 64 mm .
Firing orde r
Ignition timing
1 : 3 : 4 : 2 .
4° B .T .D .C . (Basic setting) .
Pump .
Cooling System
Circulation . .
Water pump type . .
Temperature control
. . Impeller — incorporating by-pass .
Thermostat.
Opening temperature . 70°C (158 °F )
Fully open at 85°C (185°F )
Radiato r
Filler cap . .
— pressur e
Fuel System
Fuel tank . .
. . Pressurised—finned vertical flat tubes—extended header
tank .
A .C . type .
4 lb/sq . in . 0 . 28 kg/sq . cm .
Non-pressure type mounted over rear axle .
Carburettors
. . Twin S .U . H6 .
Needle size — SM .
Air cleaners . .
Fuel pump — type . .
. . Wire gauze type .
A .C . mechanical with filter and sediment bowl .
Clutch
— operating pressure . . . . 1 1 - 2-1/2 lb ./sq . in .
Type . . . . Borg & Beck 9" single dry plate .
Hydraulic . Operation . .
Adjustment . . . . Push rod at slave cylinder .
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