Hi all , left this thread for a bit and forgot to reply . re the johnson - a test on the tamiya kph gadget which isnt exactly up to NASA standards showed the johnson di do about 30,000rpm , on the track the thing had basically no torque which would back up what Axeman said earlier in the thread ( 50gcm )
Early Johnson was all revs but no go , even in an early scalextric mini which isnt exactly a heavy car it performed dismally on my track getting left behind by cars with more modern motors that are rated at 12 - 14 k / guessing about 100gcm .
The old gold scalextric johnson didnt wind up any speed at the end of the 6 metre straight to impress either - tested a few of them so it wasnt just one dud . Hey they are what they are , its safe to say at the recent race at my place where we let the johnson run with all the other cars ( that were rpm limited to 16k ) The johnson was a reliable last place in every race .
A normal run of the mill Scalextric 18k mabuchi on 10v will dust the stock johnson on 14v , yes the Johnson can be hotted up to go , but thats a whole different kettle of fish isnt it .