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 the 114° camshaft E 82448.
| Identifier | ExFiles\Box 179\2\ img021 | |
| Date | 28th November 1931 | |
| RM.{William Robotham - Chief Engineer} P.38 28/11/31 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 I.H.P. B.M.E.P. LBS/SQ.IN. RPM STD ROCKERS HIGH LIFT ROCKERS Top Diagram: I.S 10 S 37 IN 50·3 .020 CLCE EX 54·3 Bottom Diagram: I S 15 IN 55 .013 CLCE EX 60·3 | ||