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 camshaft and high compression configurations for an engine.
| Identifier | ExFiles\Box 5a\5\ 05-page115 | |
| Date | 24th April 1930 | |
| 112° CAMSHAFT & HIGH COMPRESSION 'CHINA' ENGINE No. G.G. 58. STANDARD INDUCTION MANIFOLD STANDARD CARBURETTOR (1.75) COMPRESSION RATIO = 5.1:1 OPEN EXHAUST 112° CAMSHAFT, E55340 INLET OPENS 12° BEFORE TDC INLET CLOSES 30° AFTER BDC EXHAUST OPENS 31° BEFORE BDC EXHAUST CLOSES 11° AFTER TDC 112° CAMSHAFT 110° CAMSHAFT, E55365 I.O. 18° BEFORE TDC I.C. 30° AFTER BDC E.O. 43° BEFORE BDC E.C. 5° AFTER TDC STANDARD ENGINE STOCK 112° CAMSHAFT I.O. 12° BEFORE TDC I.C. 30° AFTER BDC E.O. 31° BEFORE BDC E.C. 11° AFTER TDC BRAKE HORSE POWER R.P.M. OF ENGINE B.M.E.P. (LBS PER SQ. IN.) WHP | ||