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 comparison graph between S.U. and R.R. carburettors, plotting Brake Horsepower (BHP) and Brake Mean Effective Pressure (BMEP) against engine Revolutions Per Minute (RPM).
| Identifier | ExFiles\Box 1\8\ B001_X100 Engine Chassis-page229 | |
| Date | 4th October 1932 guessed | |
| R.M.PR.31. COMPARISON OF S.U. & R.R. CARBURETTERS L.E.C. 3157) C/R 6.24 INLET VALVE 1.125 THROAT HEAD E.100520 OPEN EX. R.R. SEMI EXPANDING S.U. 1 5/8 BORE 108 1/2° CAMSHAFT. LONG TOE TIMED WITH .020 CLEARANCE IO T.D.C. EO 38° B BDC IC 45° P BDC EC 13° P TDC SUCTION PISTON R.R REMOVED B.H.P. R.P.M. B.M.E.P. DEPN INS. HG | ||