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).
Performance graph comparing high and low lift rockers on a 114° Camshaft E 82448.
| Identifier | ExFiles\Box 13\2\ 02-page160 | |
| Date | 28th November 1931 | |
| RM.{William Robotham - Chief Engineer} P.38 COMPARISON OF HIGH AND LOW LIFT ROCKERS ON THE 114° CAMSHAFT E 82448 TWIN CHOKE CARBS 1·4 CHOKES OPEN EX: MANIFOLD ONLY C/R 4·65-1 STD: CYL: HEAD AND VALVES 1·9 VALVE THROAT B.H.P B.M.E.P LBS/SQ" R.P.M. STD ROCKERS HIGH LIFT ROCKERS Top Valve Timing Diagram: EX IN .020 CLCE 3·7 10·5 54·5 50·3 Bottom Valve Timing Diagram: EX IN .013 CLCE 1 15 60·3 55 Graph Axis Labels: Left Y (B.H.P): 80, 90, 100, 110, 120, 130, 140, 150 Right Y (B.M.E.P LBS/SQ"): 60, 70, 80, 90, 100, 110, 120 X (R.P.M.): 500, 1000, 1500, 2000, 2500, 3000, 3500 | ||