I was looking around for info on your turbo... I've found pages that say "up to 100 hp" and "up to 600cc."
So if you're not looking make more than 100 hp, you can use a turbo that would normally be for a volumetrically smaller engine?
This thing is adorable:
In this case, I wonder if a kei car turbo setup, like the package from a Mitusbishi Dangan ZZ would be a nice kit to adapt to an Insight. Stock engine it's on is a 658cc three (with 5 valves per cylinder!):
I mean, look at that little intercooler!
Sam