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 comparing high and low lift rockers on the 114° camshaft E 82448.

Identifier  ExFiles\Box 179\2\  img021
Date  28th November 1931
  
RM.{William Robotham - Chief Engineer} P.38
28/11/31
COMPARISON OF HIGH AND LOW LIFT
ROCKERS ON THE 114° CAMSHAFT E 82448
TWIN CHOKE CARBS 1·4 CHOKES OPEN EX. MANIFOLD ONLY
C/R 4·65-1 STD. CYL HEAD AND VALVES 1·9 VALVE THROAT
I.H.P.
B.M.E.P. LBS/SQ.IN.
RPM
STD ROCKERS
HIGH LIFT ROCKERS
Top Diagram:
I.S
10 S
37
IN
50·3
.020 CLCE
EX
54·3
Bottom Diagram:
I S
15
IN
55
.013 CLCE
EX
60·3
  
  


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