Okay I have the greddy full auto. For the auto countdown it starts calculating at 3000rpm for the low setting and 2000 rpm for the high setting. My question is how does it know rpm. It does indeed calculate around those rpms. But those of you who have this timer know that the only "information" it gets is speed; wire hooked to vss. I have a 95 civic if you need to know.

 

ne one?