- Details
Camshaft Specifications
STANDARD PROFILE
Inlet
Exhaust
Lift
Identification
2 litre I
10-50
50-10
0.230”
Plain
2 litre II
24-64
64-24
0.230”
Groove
2.5 saloon
24-64
64-24
0.230”
Groove
TR5-6 P.1
35-65
65-35
0.250”
2 Rings
TR6 P.1 1972 on and all models 1972 on
18-58
58-18
0.240”
3 Rings
TRIUMPHTUNE PROFILES
Inlet
Exhaust
Lift
Power Range
Max BHP at RPM
Road 83
30-56
74-28
0.288
2200-5200
4750 RPM
Fast Road 83
37-63
74-28
0.288
2500-6000
5250 RPM
Fast Road
30-70
70-30
0.270
2500-5500
5500 RPM
Fast Road 89
34-76
58-34
0.293
2750-6250
5750 RPM
Sprint 83
34-74
74-34
0.275
2700-5750
5750 RPM
Sprint
38-70
70-38
0.274
3000-6500
5750 RPM
Race
42-80
74-48
0.280
3500-6500
6000 RPM
Race 83
42-68
78-32
0.302
3300-6500
6000 RPM
Race 86
54-86
86-54
0.290
3400-7000
6250 RPM
Note – all BHP data listed is with at least the recommended modifications in the text above.