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 ignition advance and detonation characteristics for various piston types and compression ratios using Redline petrol.

Identifier  ExFiles\Box 148\1\  scan0164
Date  1st May 1939
  
PISTONS
IGNITION ADVANCE & DETONATION
MAY 1939
S.84
W III N°4
(BENTLEY CAMSHAFT IDN. SYSTEM)
200 PISTONS
330 PISTONS
470 PISTONS
FLAT TOP PISTONS
COMP RATIO
6.5:1
7:1
8:1
6:1
โ“ MIN. ADV. FOR MAX. POWER
โ“‘ TO AVOID DETONATION
REDLINE PETROL
B.M.E.P.
R.P.M.
IGN. ADV. DEGREES B.T.D.C
C.T.S.
  
  


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