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 of high and low lift rockers with ramming, using Claudel carburettors.
| Identifier | WestWitteringFiles\W\September1931-November1931\ Scan031 | |
| Date | 6th October 1931 guessed | |
| COMPARISON OF HIGH & LOW LIFT ROCKERS WITH RAMMING CLAUDEL CARBS. JAPAN R.M. 45 A C/R 5.15 HEAD MACHINED TO GIVE .225 CLCE ROUND INLET VALVE. BEST TIMING FOR POWER. 112° CAMSHAFT. VALVE LIFT .395 VALVE LIFT .344 B.H.P. B.M.E.P. 60, 70, 80, 90 100, 110, 120 Timing Diagram A: EX IN 32 10.6 46 46 .013 CLCE C AS ABOVE BUT INLET VALVE SHROUDED. TIMING TOO EARLY FOR MAX POWER. VALVE LIFT .395 VALVE LIFT .344 Timing Diagram C: EX IN 4.6 2 40 55 .013 CLCE X-Axis: 500, 1000, 1500, 2000, 2500, 3000, 3500, 4000 R.P.M. | ||