If its the crank sensor (aka speed sensor): Dont think so!!!!
The only thing that those sensors do is misleading the ecu. By this it will adv the ignition in all sites.
You can adv your std crank sensor. I have and found out that its not that worth it.
Its better to have a good ecu remap.
btw, re-adjusting the crank sensor was allowed on the clio coupe (valver) racing.
Moving 2,65mm to the oposite way of the rotation of the crankshaft will advance 1º of the ignition.
Dont know about injection.