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 showing the effect of increased valve lift on a standard camshaft and cylinder head.
| Identifier | ExFiles\Box 13\2\ 02-page146 | |
| Date | 24th November 1931 guessed | |
| RM.{William Robotham - Chief Engineer} P.25 EFFECT OF INCREASED VALVE LIFT ON STANDARD CAMSHAFT AND CYL HEAD. TWIN CHOKE CARB. 1.4" CHOKES. OPEN EXH: 4.75 C/R.{Sir Henry Royce} STD ALUM. HEAD 1.9 VALVE THROAT VALVE LIFT .430 VALVE LIFT .480 .013 CLCE EX IN 68 51 54 B H P R.P.M. INDUCTION DEPN. INS HG B.M.E.P. LBS / SQ" | ||