[wyatt]

Originally Posted by Vekke

https://www.facebook.com/media/set/?set=a.260828010597758.84063.163711023642791&saved #!/photo.php?fbid=270254349655124&set=a.2608280105977 58.84063.163711023642791&type=1&theater

Can I do the underside same way. Make correct size and Flip the template over and put it on the same place as roof side template. Or do I have to use the lower half of the template to underside of the boattail also?

Diffusers (what is done on the bottom side of the car) are another topic. Typically, you will see people say 3-4 degrees which is optimal for drag reduction, however, even up to at least 11 degrees, you continue to be better off than not having a diffuser, at least according to Hucho. I am guessing that what you show is fine. If you want to see a car that looks a lot like the template, look into the Dolphine (sp?), if you want to see one that looks more like your drawing, look into the AeroCivic. Both work, both have reasons for their design.