Road Speed Data; Gear Ratios - Triumph TR3 Instruction Book

VALVE TIMING.
Inlet and exhaust valves to be equally open at T.D.C. on the exhaust
stroke.
VALVE-ROCKER CLEARANCES
IGNITION TIMING
Set to fire at 4° before top dead centre (distributor contact points just
opening). As the advance is fully automatic, the setting is at full retard.
Contact breaker gap should be set at 0.015" (0.4 mm.).
Engine Speeds (3.7 axle)
Using Dunlop Textile
Tyres:
at 10 m.p.h.
at 10 km./hr.
Using Michelin X Tyres:
at 10 m.p.h.
at 10 km./hr.
Engine Speeds (4.1 axle)
Using Dunlop Textile
Tyres:
at 10 m.p.h.
at 10 km./hr.
Using Michelin X Tyres:
at 10 m.p.h.
at 10 km /hr.
Gearbox Ratios
3.7 : 1 Axle
Overall Ratios
4.1:1 Axle
Overall Ratios
GENERAL SPECIFICATION
[ With valve-rocker clearance set at 0.0165" (0.42 mm.)].
(see page 31).
(see page 31).

ROAD SPEED DATA

O.D.
Top Top
412
501
250 310
409 498
... 254 309
455 556
... 283 345
... 452 552
281 343

GEAR RATIOS

O.D.
Top Top
... 0.82
... 3.034 3.7
4.17
... 3.36
O.D.
3rd
3rd
545 664
340 410
541 660
336 410
736
604
375 467
601 731
373 454
O.D,
3rd 3rd
1 1.09 1.325
4.02 4.9
4.46 5.44
7
O.D.
2nd 2nd 1st
825 1007 1573
510 620 970
820 1001 1563
509 622 971
916 1170 1744
579 694 1083
1733
910 1110
1077
565 691
O.D.
2nd 2nd 1st
1.65 2.01 3.139 3.223
6.1 7.44 11.61
6.76 8.24 12.87
SPORTS CAR
Rev.
1615
1005
1605
997
1790
1112
1779
1105
Rev.
11.93
13.21