My Questions:1.What type of engines are in each series? (RS,LS,GS,GSR,TYPE-R)2.Should I get a GS-R or a Type-R(I'm just gonna use it for like driving on the freeway and stuff, everyday use, but I want a Kick in the car I'm getting)3. Does adding a turbo to a VTEC, make the car unstable?4. What does PSI and RPM mean?