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).
Valve lift and timing specifications for a Packard car engine.
| Identifier | ExFiles\Box 127\1\ scan0070 | |
| Date | 23th February 1920 | |
| PACKARD CAR. Degree on Flywheel. valve lift. .075" 10 .078" 20 .095" 30 .1225" 40 .160" 50 .203" 60 .2625" 70 .316" 80 .350" 90 .369" 100 .387" 110 .383" 120 .383" 130 .3805" 140 .364" 150 .333" 160 .287" 170 .237" 180 .184" 190 .144" 200 .115" 210 .091" 220 .079" 230 .076" 240 .076" 250 .075" 260 Degree on flywheel. lift. 0 .070" 10 .0705" 20 .0705" 30 .074" 40 .085" 50 .106" 60 .1385" 70 .179" 80 .229" 90 .2785" 100 .322" 110 .354" 120 .370" 130 .375" 140 .366" 150 .341" 160 .3015" 170 .244" 180 .192" 190 .1485" 200 .114" 210 .0905" 220 .076" 230 .071" 240 .071" 250 .0705" Exhaust Valve Cam. .003" tappet clearance. Period of exhaust 230º lift of valve .312" ---------- Inlet valve Cam .002" tappet clearance. Period of induction 230º lift of valve .305" ---------- | ||