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 110° and 114° camshaft timings, showing B.H.P and B.M.E.P against R.P.M.
| Identifier | ExFiles\Box 13\2\ 02-page112 | |
| Date | 24th June 1931 guessed | |
| BEST TIMING 110° SHAFT COMPARED WITH BEST TIMING 114° SHAFT CAM. FORMS E.32381 4.9 C.R. OPEN EXHAUST TWIN CARBS. 1.4 CHOKES. ALUM. HEAD. STD. VALVES INLET 2.0" EX 1.85" .020 CLCE STD CAMSHAFT SAME CONDITIONS TAPPET CLCE .020 B.H.P. B.M.E.P. R.P.M. H.S. 404 Valve Timing Diagram (STD CAMSHAFT): 02, 46, 47 Valve Timing Diagram B: 19, 7.5, 67, 59 Valve Timing Diagram A: 17, 18, 56, 59 | ||