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 comparing the performance of Champion L88 and K.L.G. FL830X spark plugs on a 6-cylinder engine.
| Identifier | ExFiles\Box 162\2\ img001 | |
| Date | 19th May 1938 | |
| COMPARISON TESTS OF CHAMPION L88 AND K.L.G. FL830X PLUGS. TESTS PERFORMED ON CHASSIS 3BIV. NO. 6 CYL. BEING USED THROUGHOUT. CHAMPION L88 CURVES SHOWN THUS K.L.G. FL830X MAX. VOLTAGE ACROSS POINTS. (K.V.) PLUG GAP PICK-UP SLOW RUNNING HIGH SPEED T.S.D./394 19.5.38 | ||