[Big Dave]

This has given me an idea for another vehicle.

I picked up a 2010 Crown Vic Police interceptor in an auction. Solid car but not the least bit aerodynamic. Classic three-box layout.

Despite that, it gets surprisingly good MPG. This summer, I'm averaging about 24 MPG despite the fact I'm driving like a maniac. I did put Mooneyes on it.

Looking at the truck cap Bondo spotted, I'm thinking: Why couldn't I use a rack of louvers to improve the air flow on the P71? Hinge it at the top of the roofline and put a pair of tracks on the truck lid for roller followers on the rack of louvers. That way the rack of louvers would move up out of the way when the trunk lid is opened, and would automatically lower when the trunk lid is closed. That way, I'd get the best of both worlds. My air flow would stick to the louver profile (at least better than nothing) and I would still have decent visibility out the rear.

Whaddayathink?