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).
Graph comparing the power output and B.M.E.P. of different High Power Bentley cylinder heads.
| Identifier | ExFiles\Box 134\2\ scan0068 | |
| Date | 10th July 1936 | |
| HIGH POWER BENTLEY Fig. III. POWER COMPARISON OF HIGH POWER BENTLEY HEADS CYLINDER HEADS:- STD. BENT. E.B. 2560; T.T. BENT. Ex. 22594 HIGH POWER S/C, L.E.C. 4123 VALVE TIMING:- STD. BENTLEY TIMING FOR THE BENTLEY HEADS HIGH POWER TIMING:- I.O. 2°E.{Mr Elliott - Chief Engineer} I.C. 28°L. E.O. 51°E.{Mr Elliott - Chief Engineer} E.C. 7°L. C.R. = 6.5: OPEN EXHAUST: BORE = 3.50" HIGH POWER TURBULENT HEAD HIGH POWER T.T. HEAD STANDARD LARGE VALVE HEAD. B.M.E.P B.H.P. R.P.M. J.L.E. / 10.7.36. | ||