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).
Graph of B.M.E.P. curves for a PII standard engine with different exhaust configurations.
| Identifier | ExFiles\Box 13\2\ 02-page080 | |
| Date | 5th June 1931 | |
| CURVE 2A. PII B.M.E.P CURVES STANDARD ENGINE A TWIN CARBS. 1.300 CHOKES (COMPLETE SILENCER CUT OUT OPEN) B " " " ( " " CUT OUT SHUT) B.M.E.P R.P.M. 2/48 5.6.31 | ||