While the Legacy speed steps are 200, as speed increases, the equivilent smph (proto 2) reduces from 3 speed steps at 10 smph for 1 smph to less than 2 speed steps at higher speeds. Because I run 3 and 4 consists simultaneous with the proto 2 infront of the Legacy or TMCC engine, I am very concerned with this relationship. Most of my trains run at 10 smph which translates to 37 to 39 speed steps depending upon the engine. One further difference is that Subways have a different ratio with my R 27 at 39 speed steps for 20 smph in syncing that consist with the MTH Northern Shore. The switchers such as the Genset are a whole different animal with my Reading triple MU running at 3 smph requires the genset to be at 24 speed steps to sync with the triple. As you can see it is real simple to match speeds and when Albrecht was running my layout with me we had my dual MU MTH electrics running with the Legacy FEF-3 up to 80 smph. I just do not remember what was the Legacy speed steps. Even with my dual SMRs on my O54 6 foot loop I run the proto 2 conversion at 3 smph (actually closer to 10 smph but the small wheels and other operating characteristics of the sound file make this measurement just relative and not a true smph) and the ERR conversion (with cruise control) at 12 speed steps to have the consists match.
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