Performance graph comparing an original standard camshaft with a present production camshaft for a Phantom II 8 Litre No.7 unit.
| Identifier | ExFiles\Box 123\3\ scan0172 | |
| Date | 20th March 1934 | |
| H.S. 1338 PHANTOM II 8 LITRE N°7 UNIT COMPARISON BETWEEN ORIGINAL STD. CAMSHAFT (116° E 80070) & THE PRESENT PRODUCTION CAMSHAFT (114° E 82448) PRODUCTION S.E. CARBURETTER - LARGE INLET VALVE HEAD 5-25 C.R. OPEN EXHAUST (SHORT PIPES) * 114° E 82448 CAMSHAFT | TIMING IO° TDC | E.O. 53.5° BBDC | E.C. 4° PTDC .020 CLE. I.C. 47.7° PBDC o 116° E 80070 CAMSHAFT | TIMING I.O. 8° PTDC | E.O. 52.2° BBDC | E.C. TDC .020 CLCE I.C. 43.2° PBDC B.H.P. M.E.P. (LBS/□) R.P.M. | ||
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).