View Single Post
Old 04-27-2017, 10:09 AM   #11 (permalink)
Merlyn2220
Deep Lurker
 
Join Date: Sep 2016
Location: Central Florida
Posts: 53

Creepy Van - '95 Ford E150 Cargo
90 day: 14.45 mpg (US)
Thanks: 5
Thanked 31 Times in 22 Posts
Since I was reasonably certain that the rear "shell" was an ok idea but really, REALLY poorly executed, I did the only rational thing. I hacked most of it off! I probably cut way too much off initially, and went from no taper (or outwards flare) to too much taper. It's pretty easy to build it a little higher with foam, but it's a serious PITA to hack up fiberglass sheet and reshape it. Here's the first test, you can see a somewhat reasonable taper top to bottom.



Unfortunately the zero-taper-top and the heavily tapered sides caused some serious vortex action near the top of the sides:


My MPG stayed steady at ~13.7 with this taper, even with the horrible vortex. I had a spare backup camera so I installed it on an aluminum arm so I could see how bad it was.

  Reply With Quote
The Following User Says Thank You to Merlyn2220 For This Useful Post:
aerohead (04-29-2017)