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).
Optimal timing for a new camshaft, part number E.82448 1140, including a timing diagram.
| Identifier | ExFiles\Box 102\5\ scan0148 | |
| Date | 13th December 1932 | |
| X5090 By.{R.W. Bailey - Chief Engineer} From Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} c. to E.{Mr Elliott - Chief Engineer} c. to Mx.{John H Maddocks - Chief Proving Officer} Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson}6/MA.13.12.32. TIMING NEW CAMSHAFT E.82448 1140. We have established that the best results are obtained with a timing (measured with .020 tappet clearance) where the inlet valve does not open earlier than 2° B.T.C. or close later than 50° A.T.C. The timing, measured at the mean of these two positions, is approximately:- [Diagram Text] Top: 2° Right: IN 50 Bottom Left: EX 50 Center: .020 CLOSE Hs{Lord Ernest Hives - Chair}/Rn.{Mr Robinson} | ||