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).
Performance graph showing the effect of increasing valve lift on a China engine.

Identifier  ExFiles\Box 13\2\  02-page124
Date  5th August 1931 guessed
  
CURVE II
EFFECT OF INCREASING VALVE LIFT
ON CHINA ENGINE
ENGINE UNIT C9 CHINA.
ACCURATE C/R 5.35-1
SINGLE S.V. 1 5/8" CARB.
OPEN EXHAUST 110° SHAFT.
INDUCTION PIPE DEPRESSION.
INS / Hg.
B.H.P.
R.P.M.
B.M.E.P.
.020 TAPPET CL'CE
---- STD. VALVE LIFT .344
____ INCREASED VALVE LIFT .395
DIA. OF INLET VALVE THROAT 1.35"
INCREASE IN PEAK POWER DUE TO HIGHER VALVE LIFT 6 1/2 %
EX
IN
4
16
28
37
  
  


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