Well doing the leaf blower and shopvac idea, it would kind of make the engine a perpetual motion machine.... I think....

 

That's wayyy too complicated.
Just take a 4" dryer vent hose and connect the end of the tailpipe to the throttle body. It is called Self-Turbo.

 

Sure. Then we can silicone the doors shut and fly it to the moon.

 

Don't be silly.
The moon is a quarter of a million miles away with no gas stations on the way!

 

Yeah but with this setup we could get 100000 miles per gallon.

 

Once you somehow achieve orbital escape velocity, there is no atmosphere to slow you, inertia would carry you infinitely ..........Your truck with your frozen corpse inside could eventually reach Alpha Centauri in about 2,000yrs. You would be the all time "High mileage" champion of FTE.