older cars are equipped with cable type speedometers while newer ones such as the pizza are equipped with digital speedometers. main difference is that cable type is purely mechanical while the digital is a combination of mechanical & electronic. how can you convert ur speedometer from mechanical to an electronic one that can send pulses or data that can be translated to computer language? i have heard of the brand haldatech but since its fia approved gadget, it would cost an arm & a leg. would there be another way around this?