Factory Speed Limiter

[WeasleRx7]

OK so with my speed converter, why doesn\'t my car cut out at 112MPH (180KMH)??

I don\'t have a special cable that goes to the ECU, so it must be getting it\'s signal from the speedo.

[Adriansturgess]

My speed convertor does not remove the limiter, but it does fool the speedo and ecu into thinking that my MPH is actually only KMH.  This corrects my speedo gauge to read as MPH and effectively raises the limit to 180MPH.

As a matter of interest have you successfully taken your car over 112mph or is this all theory?

[WeasleRx7]

The car has been well over 112mph on a private track.  Same with my wifes MX5 which hit the limiter at 112MPH also, but was unrestricted when I removed the screw/connection on the back of the speedo.