From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Ignition timing and the effects of carburetter sizes on a deturbulated cylinder head.
| Identifier | ExFiles\Box 83\1\ scan0261 | |
| Date | 23th October 1936 | |
| -2- Rm{William Robotham - Chief Engineer}/FD.{Frank Dodd - Bodies}16/JH.23.10.36; The difference between small and large carburetters and pipes, is not nearly so noticeable when fitted to the deturbulated head, as with the fully deturbulated type. The ignition timing was set at 3.5º ATDC with the hand control fully advanced, this is set to suit the Delco Remy ignition curve required with the deturbulated cylinder head. Rm{William Robotham - Chief Engineer}/F.Dodd. | ||