View Single Post
Old 08-29-2012, 09:56 PM   #454 (permalink)
Sven7
Master EcoModder
 
Sven7's Avatar
 
Join Date: Aug 2011
Location: Warren, MI
Posts: 2,456

Boo Radley - '65 Ford F100
90 day: 13.28 mpg (US)
Thanks: 782
Thanked 665 Times in 408 Posts
Even though the window is attached there is still a large wake from the beltline down. I am going to build it as long as possible while still fitting the license plate and tail lights on the rear surface. With 15* angles the skin friction should not be a problem, and wake reduction will be significant- perhaps a mere fraction compared to stock?

Remember, the stock Cd of this car is something like 0.30 or 0.31. Not spectacular- there's plenty of room for improvement. With a basjoos style nose cone it should be even better. With the full belly pan, boat tail and low nose I'm expecting something like 44mpg sustained 60-65mph highway cruising instead of about 38mpg now. That's a 16% FE increase, or 32% aero improvement.

The goal is to get low 40's without P&G'ing everywhere. It gets old, especially on long trips. I want to go to Duluth and back on $30 and when I have a girl in the passenger seat I'd like her to not be mad at me.

Also interested in what you're thinking for "mechanical improvement"? WAI could come in the future if I can bribe someone who knows what they're doing.
__________________
He gave me a dollar. A blood-soaked dollar.
I cannot get the spot out but it's okay; It still works in the store
  Reply With Quote