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).
Correcting a car's performance issues related to valve clearance, jets, and fuel consumption.
| Identifier | ExFiles\Box 4\9\ 09-page166 | |
| Date | 30th September 1920 | |
| To Hs.{Lord Ernest Hives - Chair} from R.{Sir Henry Royce} Y5540 R2/1530.9.20. 7-S-C-111 X.5770 X.5840 This car was never quite right, because it always behaved the same. It has been corrected by adjusting the clearance of the 6 rear valves which were too close, and spoiled the slow running, so inducing the low speed jet to be set too strong. You will remember I thought it had a bad induction pipe. The high speed jet has now been strengthened (relatively). Amongst other faults the consumption was bad. I was very disappointed with its behaviour. It is now splendid. It may be stretching valves, but I am not sure the report from France is exactly correct. R.{Sir Henry Royce} | ||