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).
Analysis of the effects of carburettor size and enlarged inlet valve ports on engine power and torque.
| Identifier | ExFiles\Box 85\4\ scan0179 | |
| Date | 6th August 1937 guessed | |
| 3 increase in carburettor size would give any more power. A considerable drop in low speed torque is noted. This is a characteristic on all the six carburettor systems, due probably to too rich a mixture As a check, the results given on a standard unit with six Amal carburetters were corrected up for 9:1 C.R. & compared with curve ③ on Fig. III. A discrepancy in power was noted which almost exactly corresponded to the gain in power. due to the enlarged inlet valve ports – 1.350” to 1.625” – on the T.T. head. Conclusions:– From the above tests we are able to draw | ||