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).
Analysis of engine induction systems and performance, comparing American and Bentley designs.
| Identifier | ExFiles\Box 173\1\ img420 | |
| Date | 6th February 1934 guessed | |
| 3 exhaust and inlet are taken out on the same side and a simple hot spot arranged, with a thermostat controlled butterfly unbalanced which by passes the heat when once warmed up. By developing the materials the Americans have made this work every time, siamesed induction ports, four branch pipe for 8 cyls. This is not bad for M.E.P. because on the Cadillac 16, with a short duration camshaft having accelerations only 80% of ours, a carb for each 4 cyls expanding type, induction ports in no way more streamlined than the Bentley and 6.5 C/R.{Sir Henry Royce} they have the following M.E.P. curve R.P.M. 400 800 1200 1600 2000 2400 3600 B.M.E.P. 106 116 120.5 121 122 121 97 For a Rolls Royce, as opposed to a Bentley, I think this is pretty good, Steadman should be able to show if a siamesed port fundamentally loses any volumetric efficiency. The M.E.P. for Cadillacs new La{L. A. Archer} Salle side valve eight is definately down. | ||