No..actually if you look at the European market and even Japan they all are going turbo to increase HP and MPG, this is not your old Ford Thurnderbird Turbo from the 80's on a 2.3L engine. Even corvette has an impressive aftermarket rear twin turbo.sounds like a good idea, but coming from years of Turboed cars I can easily say you will not be saving gas. . . Every time you touch the boost and raise it up, you need to dump more fuel in motor or risk melting everything down.
I should SC my S-10.I think with twin turbos, 400hp is simple..........but a proper well tuned setup can save you mpg while increasing power, just like the supercharger kit for my jeep, it actually improves mpg, and speaking like 1mpg increase, but something along the lines of 2-4mpg increase...........from what I've understood......just an opinion, not a fact but its out there