Welcome !
Quote:
Originally Posted by Farraider
Hi Everyone,
I have a camper I built from a 1994 square-box-style ambulance. It has a 7.3 IDI diesel and get about 13mpg at 55mph
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Never going to return great mileage with a huge engine and boxy bodywork.
Do you plan on doing many miles /year ?
That'll mean wether the improvements have any true value (saved fuel minus your investment)
Driving 5mph slower may be an option.
Quote:
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It has a huge flat front area that just grabs the wind and I keep thinking about putting something up there to make it more aerodynamic.
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Air dam underneath up front
Sideskirts
Cover the rear wheel arc
Wheel hub caps
Close the gap between cab and box, if any, including underneath.
Bigger / wider & higher deflector on the roof of the cab.
Bigger radius on the corners of the box
(by adding a half-pipe - can be used to store long thin items)
or
turning vanes on the corners
Rounding the rear corners too much, will decrease stability though
(google coanda effect
You would need something like this to reduce drag aft:
Lighter color than black will keep it cooler