I’ve owned and raced Triumph Vitesses for many years. I’m retired now and I’m studying for a degree in engineering, for which I need a research project. I have chosen to research a question that has concerned Triumph owners of six-cylinder engines since they were developed. Their long crankshafts are vulnerable to torsional vibration, but is the rubber damper in the crankshaft pulley effective?
Even in the day, when the engines were new, Kas Kastner, Triumph’s American race engineer was concerned that they could loosen. The original pulleys are now at least forty years old, and many show signs of deterioration in the rubber. This could lead to the outer ring shifting, making it impossible to time the engine, and to loss of damping and even crankshaft failure. How often this has happened is unknown, and I’m asking experienced Triumph owners what they know about the dampers.
Please will you complete the following short questionnaire?