[justme1969]

Boat tail is not an option for my sedan model. but something rarely touched upon here is adding a diffuser and vortex generation / turbulence Ideas.
I cant seem to post pictures here or I would post my crayon sketch "LOL"
Company only added CAD reader to my new puter, impossible to undo a stupid move like that here.
Anyhow theres a few piks that show my rear end attempts to date in garage. Spoiler reversed and tucked behing rear glass, shorter ride height for rake,dam n skirts to reduce parachute effect.
Well if I add a diffuser similar to the weak attempts on a few recent new mini vans just above the top of my rear window it will confuse the air mass and react similar to a boat tail if I add rear bumper extension or trunk extender to divide the massed air before it creates the vaccume behind rear of car.
not a cam back a true diffuser with ported air and spoilers similar to small trim tab devices??? Anyone gone this route b4? Am I cutting edge of 1950s aircraft technology installed on modern aerodynamic automobile???