etb speedo setup

[steve8274]

hi all
first of all happy new year
i need to calibrate my etb gauge, its the traditional style with digital mileometer? The instructions state i have to drive car for a mile to do this. the car is not road legal yet and dont wish to be caught on roads just yet.
the manual also states you can enter a "Pulse/distance ratio"
does anyone know what this figure is?
car is using sierra running gear with 1.8 cvh engine if it makes a differnece
thanks
steve