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).
Specifications for 22-EX valve timing, clearances, and tyre dimensions.
| Identifier | ExFiles\Box 155\1\ scan0026 | |
| Date | 23th July 1932 guessed | |
| 22-EX Valve Timing. .020" Tappet Clearance. I.O. .35" PTDC 2.6o E.O. 6.75" BBDC 50.2o I.C. 7.2" PBDC 53.6o E.C. 1.25" PTDC 9.4o Inlet valve lift = .451 + .005 clearance Exhaust " " = .450 + .009 " 7 x 20 tyres - 104.25" 7 x 21 " - 107" with 50 lbs pressure. | ||