This is a 3d printed turbo I designed. Just blow an air hose through it and try to see if you can make it sound like a real turbo.

Assembly

First put the barring on the connecter rod. 

Next put the impeller with more fins on the rod

Then put the middle turbo part on

Next put the other impeler on

Next put the turbo cap and the throtle on

If you blow through the end it will spin like a turbo.