- Details
Here is the full range of performance profiles for the two types of cams fitted to these 4 cylinder engines.
Small Bearing 1147/1290cc
Fast Road - 280° - Open road profile - (212164/TH5)
Fast Road 89 - 290° - Weber profile - (TT13051N)Large Bearing 1296cc
Road 89 - 272° - Good road profile - (TT14041N)
Fast Road - 280° - Open road profile - (TT1405N)
Fast Road 89 - 290° - Weber profile - (TT14051N)Large Bearing 1500cc
Blueprint - 256° - Standard class competition - (TT1483)
Road 83 - 266° - Basic road profile, excellent - (TT10504N)
Fast Road 83 - 280° - Best road profile - (TT10505N)
Fast Road 89 - 290° - Weber profile, more top end power - (TT14051N)
Race 83 - 290° - Wider power band, high lift - (TT10906N)TRIUMPHTUNE PROFILES
Profile name Inl. timing Exh. timing Camshaft lift Power range Max. BHP at - RPM
Road 89 22-70 62-88 0.276 2600-6000 5250
Road 83 30-56 74-28 0.288 2200-5200 4750
Fast Road 30-70 70-30 0.270 2500-5500 5500
Fast Road 83 37-63 74-28 0.288 2500-5500 5250
Fast Road 89 34-76 58-34 0.293 2750-6250 5750
Race 42-80 74-48 0.280 3500-6500 6000
Race 83 42-68 78-32 0.302 3300-6500 6000