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 showing the effect of induction pipe diameter on twin carburettor engine performance.

Identifier  ExFiles\Box 13\3\  03-page380
Date  27th November 1931
  
EFFECT OF PIPE DIA. ON TWIN CARB.
RM.{William Robotham - Chief Engineer} P36
27/11/31
114° CAMSHAFT T.H.O INLET CAMS HIGH LIFT ROCKERS
OPEN EXHAUST COMP. RATIO 4.65:1 1 3/4" CHOKES
INDUCTION PIPE DIA. 1.875 ------
1.550 _____
Valve Timing Diagram Text: Ex, In, 49, 52, 25, 15, T.D.C., 020 CLCE
Left Y-Axis: B.H.P.
Right Y-Axis: B.M.E.P. LBS/SQ'
X-Axis: R.P.M.
  
  


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