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).
Performance graph for a 1 5/8' SU carburettor on a standard 25HP cylinder head, comparing different induction configurations.
| Identifier | ExFiles\Box 103\4\ scan0114 | |
| Date | 7th March 1934 | |
| No 2. UNIT C XIII SPEC. RHC{R. H. Coverley - Production Engineer}/WSS 14/AP. & 12. 33. COMP. RATIO 5.7:1 STD. BENTLEY CAMSHAFT. OPEN EXHAUST. 1 5/8" SU CARBURETTOR ON STANDARD 25 HP CYL. HEAD (1) INDUCTION PIPE HS{Lord Ernest Hives - Chair} STANDARD WAY UP (2) DITTO. INVERTED (3) CARB. TO LEG 3638 ON OPPOSITE SIDE OF ENGINE 1.200" HOLE THROUGH BLOCK. CARBURETTOR BOLTED DIRECTLY ON PIPE. B.H.P. R.P.M. DEPRESSION - INS. HG. BMEP - LBS. □'' | ||