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).
Page discussing exhaust welding, silencer performance, and engine power increase.
| Identifier | ExFiles\Box 152\3\ scan0032 | |
| Date | 11th May 1925 guessed | |
| .2. If these results are not obtained then the welding of the exhaust has not been properly done or something in front of the Silencer is impeding its action. The startling change will at once be apparent to the driver and he will intelligently co-operate with the Silencer. With this co-operation the economy in petrol consumption ought never to be less than 20 to 25% and the power of the engine increased beyond belief. | ||