Hiya guys

I have an xr2 with a series 2 engine, the car has a piper285t2 cam but is still restricted to 6.2k revs;_(

I have swapd ecu,s and rotor arms with my brothers car as that revs to 7.2k but my car will still not rev past 6.2k, apparently there is a limiter on the fuel ecu?

This can be modded by changin a resistor so im told how true is this and how do i go about doing it?

Many thanks Paul.