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 plotting B.M.E.P. against back pressure for back pressure tests at 4000 R.P.M.
| Identifier | ExFiles\Box 134\2\ scan0141 | |
| Date | 9th August 1937 | |
| HIGH POWER HEAD FIG VI BACK PRESSURE TESTS - 4000 R.P.M B.M.E.P. BACK PRESSURE "HG ① STANDARD BENTLEY (3 1/2 LITRE) C.R. = 6.4. VALVE TIMING:- I.O. 4°E; I.C. 51°L; E.O 51°E; E.C. 7°L. ② INCLINED VALVE HIGH POWER HEAD C.R. = 6.3. VALVE TIMING - I.O. T.D.C. I.C. 30°L. E.O. 35°E; E.C. T.D.C. ③ AS ② BUT VALVE TIMING MODIFIED TO I.O. 2°E; I.C. 28°L; E.O. 51°E; E.C. 7°L. | ||