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).
Modifying inlet valve guides for engines with increased valve lift.
| Identifier | ExFiles\Box 123\5\ scan0139 | |
| Date | 29th October 1938 | |
| BR/NS{Norman Scott} C. Rm.{William Robotham - Chief Engineer} 1044 File DA.{Bernard Day - Chassis Design}5/G.29.10.38. SWDC - B.60. INLET VALVE GUIDES. On the engines which have the increased inlet valve lift i.e. .437 and .450, it will be necessary to reduce the height of the guides. Herewith PD.294 shewing the modification. It will be noticed also that in a cylinder head with a ratio of 7 to 1, the valve if it remains open just fouls the piston top. DA.{Bernard Day - Chassis Design} | ||