thats stupid because whats the point? double the pistons a 4 is now a 8 more weight and if you want the extra air in the motor isn't easyer just to pu on a turbo or supercharger?

after you look at it kind of works like a turbine they compress the air with a fan that pushes the air into a chamber then add fuel and a spark ant it turns the turn fan and pow jet power .. if you wan t a cool littl e motor try make a turbo into a jet engine !!!!
Sal's DIY Home Built Jet Engine / Gas Turbine Jet Motorcycle Project