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Performance Camshafts - Triumph 6 Cylinder

Performance Camshafts - Triumph 6 Cylinder

All of the recommendations listed are with the proviso that the Triumph 6 engine must be allowed to breath first and not change the cam profile until at least some initial improvements are made. We recommend for all models that an Extractor manifold and GT system are fitted first.

For 2 litre models and 2.5 litre carburettor models we also recommend that Twin HS6 carburettors and K&N air filters are fitted. The first stage of conversion will improve the flow through the engine to improve the power within the standard rev range although this will also be extended. We also recommend the addition of a gas flowed cylinder head for all models to give worthwhile improvement in torque.

The cam profiles could be fitted earlier but the benefit will not be felt until the modifications above are installed. The change of camshaft profile will alter the power range further up the rev range, but the tractability will be improved by the correct matching of the engine components. The cam profile will always be more ‘peaky’ when used in 2 engines against 2.5L.  Its worthwhile to note that after the Road 83 profile, the metering unit may require attention to the fuel supply, this can only be carried out on the car and with a rolling road.

All camshafts listed with the suffix 'N' are new, made from chill cast iron, eliminating problems resulting from regrinding worn old camshafts.

New cam followers should be fitted when replacing the camshaft. You will also need Cam Lube (KEN2) and a camshaft timing disc (TT2929).

See bottom of page for more information and specifications. For individual camshaft info, please click on the part number below you wish to find out more about.

  Description Price
(each)
Qty  
Camshaft, road 83, new Part Number: TT10404N Notes: 266° duration – mild profile for everyday use Application: 2.5-2.7 litre
£372.70
Camshaft, fast road, new Part Number: TT1204N Notes: 280° duration – good road profile Application: 2 litre
£354.00
Camshaft Camshaft, fast road 83, new Part Number: TT10405N Notes: 280° duration – very good profile for all round use Application: 2 litre, 2.5-2.7 litre
£352.80
Camshaft, fast road 89, new Part Number: TT12041N Notes: 290° duration – higher lift road cam for fast road use Application: 2 litre, 2.5-2.7 litre
£354.00
Camshaft, sprint, new Part Number: TT1205N Notes: 288° duration – best all-round fast road cam (CP engines) Application: 2.5-2.7 litre PI
£354.00
Camshaft, sprint 90, new Part Number: TT1244N Notes: 290° duration – new sprint profile giving improved power band Application: 2.5-2.7 litre PI
£334.20
Camshaft, race 86, new Part Number: TT1706N Notes: 320° duration – very top end power Application: All
£348.70
Cam Follower Part Number: 143552 Application: All
£4.19
Cam Follower, lightweight Part Number: TT1209 Application: All
£8.59
  • 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.

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