not going to bother I need something faster anyway, my Sirocco doesn't get above 19 even with the lcd limiter off
thinking of going the e-kit route now if I can find someone local to help me build it
keep in mind that air resistance is proportional to the cube of your speed, the energy consumption per mile is to the square of your speed without pedalling.
I use the formulae P = 2WH + 0.065WH * MPH * MPH, that works out to 8.5WH/m @ 10mph, 16.6WH/m @ 15mph, 28WH/m @ 20 mph, 42.6WH/m @ 25mph and 60.5WH/m @ 30mph before adding headwind.
The power of your motor can be calculated from the energy consumption, 250W motor should be good for 15mph, 560W motor is needed for 20mph, 1065W motor for 25mph and 1.8kW motor for 30mph. Batteries are usually limited to continuous 2C because of the Peukert effect, for a 20 miles journey on power, you need a minimum 36V 15AH battery at 20mph, 48V 20AH (8kgs battery) at 25mph and at you can't find a ready made battery that would do 20 miles at 30mph.