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 | ||