Rolls-Royce Archives
         « Prev  Box Series  Next »        

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).
Comparative table of engine valve specifications for various car models.

Identifier  ExFiles\Box 13\2\  02-page101
Date  17th June 1931 guessed
  
COLUMN HEADERS:
Car, Displacement, Displ. /Cyl., AREA OF VALVE /LITRE (INLET, EXHAUST), VALVE LIFT (INLET, EXHAUST), AREA PAST VALVE /LITRE (INLET, EXHAUST), VALVE TIMING.

TABLE DATA:
Row 6: Car: Auburn 8-98, Displacement: 4410, Displ. /Cyl.: 551, Area Inlet: 2.95, Area Exhaust: 2.81, Lift Inlet: .344, Lift Exhaust: .344, Area Past Inlet: 2.82, Area Past Exhaust: 2.75
Row 11: Car: Buick 8-90, Displacement: 5650, Displ. /Cyl.: 706, Area Inlet: 3.26, Area Exhaust: 2.83, Lift Inlet: .340, Lift Exhaust: .340, Area Past Inlet: 2.62, Area Past Exhaust: 2.41
Row 4: Car: Cadillac 1/12, Displacement: 6030, Displ. /Cyl.: 502, Area Inlet: 3.30, Area Exhaust: 3.30, Lift Inlet: .344, Lift Exhaust: .344, Area Past Inlet: 3.14, Area Past Exhaust: 3.14
Row 1: Car: Cadillac 1/16, Displacement: 7400, Displ. /Cyl.: 462, Area Inlet: 3.58, Area Exhaust: 3.58, Lift Inlet: .344, Lift Exhaust: .344, Area Past Inlet: 3.40, Area Past Exhaust: 3.40
Row 15: Car: Chevrolet, Displacement: 3180, Displ. /Cyl.: 530, Area Inlet: 3.12, Area Exhaust: 2.65, Lift Inlet: .277, Lift Exhaust: .277, Area Past Inlet: 2.33, Area Past Exhaust: 2.20
Row 8: Car: Graham 6, Displacement: 3670, Displ. /Cyl.: 612, Area Inlet: 3.14, Area Exhaust: 2.75, Lift Inlet: .340, Lift Exhaust: .340, Area Past Inlet: 2.72, Area Past Exhaust: 2.57
Row 2: Car: Graham 8, Displacement: 4020, Displ. /Cyl.: 502, Area Inlet: 3.82, Area Exhaust: 3.25, Lift Inlet: .340, Lift Exhaust: .340, Area Past Inlet: 3.30, Area Past Exhaust: 3.14
Row 5: Car: Hissel I8G, Displacement: 4880, Displ. /Cyl.: 610, Area Inlet: 3.41, Area Exhaust: 2.75, Lift Inlet: .344, Lift Exhaust: .344, Area Past Inlet: 2.88, Area Past Exhaust: 2.61
Row 7: Car: Lincoln, Displacement: 6290, Displ. /Cyl.: 786, Area Inlet: 4.00, Area Exhaust: 3.50, Lift Inlet: .32, Lift Exhaust: .32, Area Past Inlet: 2.75, Area Past Exhaust: 2.34
Row 14: Car: Chrysler 8, Displacement: 4960, Displ. /Cyl.: 582, Area Inlet: 2.54, Area Exhaust: 2.30, Lift Inlet: .312, Lift Exhaust: .312, Area Past Inlet: 2.41, Area Past Exhaust: 2.30
Row 17: Car: Marmon 16, Displacement: 8050, Displ. /Cyl.: 503, Area Inlet: 3.02, Area Exhaust: 2.25, Lift Inlet: .328, Lift Exhaust: .328, Area Past Inlet: 2.71, Area Past Exhaust: 2.71
Row 9: Car: Stutz 6, Displacement: 3940, Displ. /Cyl.: 657, Area Inlet: 3.27, Area Exhaust: 3.27, Lift Inlet: .344, Lift Exhaust: .344, Area Past Inlet: 2.70, Area Past Exhaust: 2.70
Row 10: Car: Stutz 8, Displacement: 5270, Displ. /Cyl.: 659, Area Inlet: 3.26, Area Exhaust: 3.26, Lift Inlet: .422, Lift Exhaust: .422, Area Past Inlet: 2.70, Area Past Exhaust: 2.70
Row 16: Car: R.R. P.I STANDARD CAMSHAFT, Displacement: 7668, Displ. /Cyl.: 1280, Area Inlet: 2.45, Area Exhaust: 2.10, Lift Inlet: .435, Lift Exhaust: .435, Area Past Inlet: 2.0, Area Past Exhaust: 1.95
Row 12: Car: R.R. JAPAN L.L2. CAMSHAFT, Displacement: 3670, Displ. /Cyl.: 612, Area Inlet: 2.52, Area Exhaust: 2.42, Lift Inlet: .344, Lift Exhaust: .344, Area Past Inlet: 2.47, Area Past Exhaust: 2.43
Row 3: Car: R.R. JAPAN 'F' CAMSHAFT, Displacement: 3670, Displ. /Cyl.: 612, Area Inlet: 2.52, Area Exhaust: 2.12, Lift Inlet: .441, Lift Exhaust: .441, Area Past Inlet: 3.17, Area Past Exhaust: 3.12

VALVE TIMING (degrees):
Auburn 8-98: Inlet Opens 10, Inlet Closes 40, Exhaust Opens 45, Exhaust Closes 10
Buick 8-90: Inlet Opens 15, Inlet Closes 50, Exhaust Opens 45, Exhaust Closes 15
Cadillac 1/12: Inlet Opens 0, Inlet Closes 40, Exhaust Opens 45, Exhaust Closes 0
Cadillac 1/16: Inlet Opens 10, Inlet Closes 40, Exhaust Opens 45, Exhaust Closes 10
Chevrolet: Inlet Opens 9, Inlet Closes 39, Exhaust Opens 42, Exhaust Closes 4
Graham 6: Inlet Opens 5, Inlet Closes 45, Exhaust Opens 45, Exhaust Closes 5
Graham 8: Inlet Opens 10, Inlet Closes 50, Exhaust Opens 50, Exhaust Closes 10
Hissel I8G: Inlet Opens 10, Inlet Closes 40, Exhaust Opens 45, Exhaust Closes 5
Lincoln: Inlet Opens 15, Inlet Closes 50, Exhaust Opens 55, Exhaust Closes 15
Chrysler 8: Inlet Opens 10, Inlet Closes 48, Exhaust Opens 48, Exhaust Closes 10
Marmon 16: Inlet Opens 20, Inlet Closes 48, Exhaust Opens 48, Exhaust Closes 20
Stutz 6: Inlet Opens 10, Inlet Closes 40, Exhaust Opens 40, Exhaust Closes 10
Stutz 8: Inlet Opens 10, Inlet Closes 40, Exhaust Opens 40, Exhaust Closes 10
R.R. P.I: Inlet Opens 5, Inlet Closes 45, Exhaust Opens 47, Exhaust Closes 5
R.R. JAPAN L.L2.: Inlet Opens 5, Inlet Closes 40, Exhaust Opens 40, Exhaust Closes 5
R.R. JAPAN 'F': Inlet Opens 20, Inlet Closes 60, Exhaust Opens 60, Exhaust Closes 20
  
  


Copyright Sustain 2025, All Rights Reserved.    whatever is rightly done, however humble, is noble
An unhandled error has occurred. Reload 🗙