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 detailing improvements to the J1 engine's power output for the Bensport car.
| Identifier | ExFiles\Box 3\4\ 04-page158 | |
| Date | 18th January 1933 guessed | |
| IMPROVING J1 POWER OUTPUT FOR BENSPORT CAR S.U.C/B 2, 1.625 THROTTLED DIA S.U.S. OPEN EXHAUST C.13. UNIT CYL. HEAD TO L.S6504 BALANCE PASSAGE BETWEEN TWO HALVES OF INDUCTION PIPE 1.062 DIA. Graph Key: 1) STANDARD CAMSHAFT E.57177 2) BENSPORT CAMSHAFT L.E.C.3268 3) AS 2 CLEARANCE ROUND INLET VALVE INCREASED AS V 1452 Axis: B.H.P. R.P.M. Diagram 1 (Standard): STD. 25 H.P. CAMSHAFT E.57177 Ex Iv 110.5° 0.20 4.869 45 Diagram 2 (Bensport): BENSPORT CAMSHAFT L.E.C.3268 & E.55272 T.D.C. 8.7 113.5° Iv 0.20 55 45 Other Text: SINGLE CONTACT BREAKER LIMITS SPEED | ||