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).
Comparison of High Power and Chevrolet cylinder heads, showing valve sizes and cross-sectional diagrams.
| Identifier | ExFiles\Box 133\1\ scan0083 | |
| Date | 11th July 1926 | |
| High Power Head Fig II COMPARISON OF HIGH POWER AND CHEVROLET HEADS VALVE SIZES CHEV. HIGH POWER INLET 1.15" 1.75" EXHAUST 1.25" 1.50" CHEVROLET INLET EXHAUST HIGH POWER ALTERNATIVE PLUG POSITION INLET EXHAUST JLE{J. Lee Evans - Chassis Test Manager} 11.7.26 | ||