aftermarket electric speedo

[Tiapan]

hey guys to pass the pits the stupid guy wants my speedo to be in kmph and not mph...the thing is my digital speedo is great cuz it reads to 999mph and also can tell you your top speed all-time record, 1/4 mile times and 0-60mph times.

now the thing is, when calibrating the speedo you mesure out 2 miles, push your little speedo calibrate button and then drive the 2 miles and push the button, my electric sender pulses a set amount of times over the 2 mile distance and this number is used to calculate speed, quite simple really.

NOW i was thinking if i traveled a SHORTER distance (calculated by using km and miles) then i would be able to trick my speedo into thinking i was going faster and therfore reading a higher mph, if the distance was calculated correctly i would be able to make the speedo THINK its reading in high MPH but acctually read in kmph...........can it be done?

P.S i have already brought an autometer gauge in kph just incase and set me back almost $400 :(