OT: Turbo on a friends coworkers car, Don't understand how this works Options

[turnaround89]

My buddy asked me if i knew that a turbo'd car can be more fuel efficient than a non-turbo car, my answer was yes if its set up correctly and not driven to the max all the time. After the answer i gave him, he then said that his coworkers car is setup so the unburned fuel in the exhaust gets put back into the motor to burn again, the unburned fuel in the exhaust gets put through the turbo. That's the part i don't understand at all, because on the turbo i have and will hopefully put on my 914, the exhaust turbine and intake turbine are separated by the bearing and seals, so the gasoline won't make it through that. I then made the comment that his turbo must have a way of separating the unburned gas from the exhaust gases, my buddy said yes his turbo can do that...HOW? I can't figure out how that works!!

I tried searching google for some info on this and also went through the book i have on turbo's again, and didn't find anything that was helpful.

Ive never heard of a turbo working like this before. the turbo is on a civic, if that helps at all, and i don't know if it stock or not, maybe the japanese developed one hell of a turbo setup that can do this, but how does it work? Or the owner of the civic is throwing out some serious bull (IMG:style_emoticons/default/stromberg.gif). At first, i thought this was a complete lie, but i could easily be wrong, im not a car genius but never came across any turbo like this before!!

Anyone ever heard of a turbo separating gas from exhaust? I've tried figuring out how this worked all day while working