[fabrio.]

Hi boys

I am going to make the rear diffuser on my car, but serching in all my documentations, I do not understand what is the ideal rear diffuser angle in order to drag reduction.
I suppose, that this angle, he is conseguence of same car measure like the lengh of total body and the lengh of rear diffuser, but also the ground clearance.

Do you have some indications to tell to me?

thanks