The 205GTi turbo technics (an aftermarket conversion, sold through peugeot dealerships) was fitted with an extra injector controller. For uber ***** management, it does work ok, even on part throttle. You might also want an ignition retard device. For safety.

However, a megasquirt would probably work out about the same price as all the extra injection equipment and a megasquirt is badass, not ghetto. So, buy a megasquirt.

 

with a controller, an extra injector or two would work great, but just wired to the others it wont really work at all

 

What about a hobbs switch and a Toyota cold start injector?

 

that would only be useful at full throttle also. you need something that can read the amount of boost so it can pulse the injector properly. just having a pressure switch that can turn the injector on will only make it put a certain amount of fuel in so part throttle boost would suck