Anybody who ever used one off those app's on a smartphone to see how fast your car is on the 1/4 mile?
Don't know how accurate this is so maybe there is somebody who compared it all ready to his real timeslip?
Henk!!!
When a ruler from the 60`s is working then I take it for granted that so can a app. It will depend if you are able to change gear box and hp settings (FHP vs WHP). Some even have altitude settings.
-BB-
I should have explained it better i mean those app's that work on a GPS signal.
So those who that actually measure your time and top speed after 400 meter.
You can do that or see what your 0-100 km/h time is.
Henk!!!