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 two different carburettor setups on an 8.1 Litre Phantom engine.
| Identifier | ExFiles\Box 92\2\ scan0189 | |
| Date | 8th December 1933 | |
| HS{Lord Ernest Hives - Chair} 1228 8.1 LITRE PHANTOM POWER TESTS (OPEN EXHAUST) COMPARISON BETWEEN 2 SU CARBS AND SEMI EXPDG CARB (LEC 3432) CURVES WITH 6:1 RATIO CYL HEAD - LARGE INLET VALVES (Ex 12011) 2.000 THROAT 14 M/M SPARK PLUGS KLG 765A - DOUBLE TAPER VALVE SPRINGS A - 2 1-7/8 SU CARBS 1/4 BALANCE HOLE B - 1 SEMI-EXPANDING CARBURETTER LEC 3432 BHP MEP (LBS □') R.P.M TIMING .020 CLCE IO 6° BTDC EO 58° BBDC IC 48° PBDC EC TDC INDN MAN' DEPRESSION INS Hg. RWS 8-12-33 | ||