Thanks. Hmmm. According to page 22, the manufacturer's recommended setting for practice rank is C, which equals 58.50 seconds. For racing times, it recommends B. The mame history dat only shows the C settings, and mame since at least .104 has defaulted at A for both - which is 57.5 seconds. (G is 57!)
Incidentally, for anyone curious, apparently the top speed possible is 244mph, via settings G or H.
Something else interesting is that settings the dips on or off will result in two types of behavior for each ranking. I swore after coming across mame that I saw PP back in the day allowing four laps. Well. That's because I saw the cockpit first - and the (recommended) B setting 'off' equals four laps. The upright, however, is recommended 'on', which equals three laps. Add to that, between the two machines there's a flip-flop of difference in times awarded into the second and third laps.