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 of vapor lock tests on an AC combination fuel pump and vacuum booster on a 1935 Pontiac Six.
| Identifier | ExFiles\Box 149\4\ scan0281 | |
| Date | 1st July 1935 | |
| VAPOR LOCK TESTS ON AC COMBINATION FUEL PUMP AND VACUUM BOOSTER ON 1935 PONTIAC SIX. Y-AXIS: REID VAPOR PRESSURE OF GASOLINE X-AXIS: ATMOSPHERIC TEMPERATURE °F SERIES 1: COMBINATION WITH FUEL PUMP BELOW BOOSTER INSULATING GASKET BETWEEN FUEL PUMP AND CRANKCASE - FUEL PUMP SHIELDED BORDERLINE VAPOR LOCK AT 60-65 DURING ACCEL. ON LEVEL FOLLOWING 5 MIN. STOP WITH IGN. OFF. ALSO 4-8 MILE LOSS IN MAX. SPEED ON 11% HILL NO VAPOR LOCK FOUND IN ANY TEST SERIES 2: COMBINATION WITH FUEL PUMP ABOVE BOOSTER NO INSULATING GASKET NOR RADIATION SHIELD MOMENTARY VAPOR LOCK ON 11% HILL AFTER 5 MIN STOP WITH IGN. OFF GASOLINES EQUIV. 9.0 LBS. AT 100° F.{Mr Friese} SERIES 3: 1935 PRODUCTION MOMENTARY CUTTING OUT ON 11% HILL AFTER 5 MIN. STOP WITH IGN. OFF DATA POINTS: 15.2, 10.1, 7.2 | ||