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 comparison graph of high and low lift rockers with ramming, for different valve and timing configurations.
| Identifier | ExFiles\Box 102\1\ scan0039 | |
| Date | 1st January 1940 guessed | |
| R.M.145 COMPARISON OF HIGH & LOW LIFT ROCKERS WITH RAMMING CLAUDEL CARBS. JAPAN A.{Mr Adams} C/R 5.15 HEAD MACHINED TO GIVE .125 CLCE ROUND INLET VALVE BEST TIMING FOR POWER 112° CAMSHAFT VALVE LIFT .395 VALVE LIFT .344 B.H.P. B.M.E.P. R.P.M. Graph A Timing Diagram: IN: 10.6, 46 EX: 46, 32 .013 CLCE C. AS ABOVE BUT INLET VALVE SHROUDED TIMING TOO EARLY FOR MAX POWER VALVE LIFT .395 VALVE LIFT .344 Graph C Timing Diagram: IN: 2, 55 EX: 40, 4.6 .013 CLCE | ||