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 different carburetter and induction pipe layouts.
| Identifier | ExFiles\Box 179\2\ img056 | |
| Date | 10th December 1931 | |
| R.M. D45 COMPARISON OF CARBURETTERS AND INDUCTION PIPE LAY-OUTS P1 114° CAMSHAFT E.62448 MANIFOLD ONLY STD. VALVES 1.9 INLET THROATS 5.22 C/R ① STANDARD R.R CARB ② R.R TWIN CARB BALANCED ABOVE CHOKES & IN INDUCTION PIPE 1.4 CHOKES ③ 2 SEPARATE S.U.S 1.25 BALANCE PIPE ④ SINGLE S.U. 2.5 THROTTLE DIA. Left Diagram: EX, IN, 0.20 CLCE, 16.0, 54.5, 50.3, 4, 10.5 Right Diagram: EX, IN, 0.13 CLCE, 15, 55, 60.5, 5 Y-axis Left: B.H.P. Y-axis Right: B.M.E.P. X-axis: R.P.M | ||