Ahhh....FI with a leafblower. Wow, this is going to take aim by haters of ghetto-engineering and Message board haters.
Okay electric fans, leaf blowers whatever the case might be...probably wont work. If you could find an electric motor that could get rpms that high, you´d more then likely end up with a dead battery and an alternator going out all the time (not an easy change in a GT).
Now back to compressed air. I too thought about it. It would take some pretty hard control logic but could be done. Even like a little 10lb take would work pretty well. But you will need increased fuel flow and timing control. Lets say you could figure out a way to only get about 5psi into the manifold, you could increase fuel with a fuel pressure riser and a new pump. So fuel would be easy. Timing could be easy too. Boost sensitive stuff like an MSD BTM would be great, but honestly you could do it just by running retarded all the time. Still...it would be a cheap way to get some boost for a second, it woudn´t be limited by rpms or anything. And unlike N2O its cheaper to refill.
I thought of the concept about 3 years ago and my research into the topic led me to actually just turbocharging my car. I´m really hoping that I can still figure out a way to do it....because it would be the answer to turbo-lag. I just thought it would be something different and a good clean air alternative to N2O.