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).
Change in cam angle and timing for the 20/25 HP engine.
| Identifier | ExFiles\Box 102\5\ scan0089 | |
| Date | 2nd October 1931 guessed | |
| FILES. X5090 20/25 HP. HIGH LIFT CAMS. If we make the angle between the cams 112º instead of 110½º on the new camshafts E.57177, which we have issued experimentally as per R's memos. we should get the following timing - [Diagram showing cam timing] I.O E.C.12º I.C.50º E.O.47º 15º WITH 110½º 50º By | Cgh{W Clough} | ||