Rolls-Royce Archives
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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).
Graph comparing engine performance using high lift rockers with different valve lifts and carburettors.

Identifier  ExFiles\Box 13\2\  02-page139
Date  9th August 1931 guessed
  
COMPARISON OF HIGH LIFT ROCKERS RM.{William Robotham - Chief Engineer} P.20
SMALL VALVE HEAD 476 C/R
INLET VALVE THROAT 1.680
114° CAMSHAFT E.82448
TIMING AS IN RM{William Robotham - Chief Engineer} P.19
--- VALVE LIFT .525
- - - VALVE LIFT .470
CLAUDEL CARB.
R.R. TWIN CHOKE CARB
1 1/4 THROAT
B.H.P
R.P.M
B.M.E.P LBS/SQ "
INDUCTION DEPN. INS. HG.
NO APPRECIABLE DIFFERENCE IN LOW SPEED M.E.P. WITH VALVE LIFT.
  
  


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