In reply to Enyar:
I guess you could put the slide-in camper in a station wagon.
Might look a bit redneck though.
In reply to Enyar:
I guess you could put the slide-in camper in a station wagon.
Might look a bit redneck though.
Kenny_McCormic wrote: Some other stuff came to mind. If you haven't already, synthetics in the diffs, wheel bearings, u joints, transmission, t case, etc. have been known to show some gain, some claim as much as 1-2mpg. If you have a mechanical fan, consider replacing it with an electric unit, also reportedly good for a point or so. As for airflow, I'd hazard a guess you'd be better off smoothing out the air under the truck, versus trying to block it off.
Depends on the fan. My 80's GM clutch fan was worth 0 mpg increase going to electric, and 0 mpg increase going to no fan (just to test).
I'm not sure how the fan is set up on a ford but from what I've read (never needed to try it) on a gm you can adjust the temp for the clutch fan to engage by bending the tang on the spring.
If your clutch fan engages early you may be losing some mpg there. A little trial and error may be required to get the fan to stay disengaged on the flats and engage on the longer climbs where you start to build up heat.
jstand wrote: I'm not sure how the fan is set up on a ford but from what I've read (never needed to try it) on a gm you can adjust the temp for the clutch fan to engage by bending the tang on the spring. If your clutch fan engages early you may be losing some mpg there. A little trial and error may be required to get the fan to stay disengaged on the flats and engage on the longer climbs where you start to build up heat.
That is a darn fine idea which costs $0
I have pretty much the same truck that the O.P. has.
It's a clutch fan on my truck and I've only had the clutch engage when pulling a grade with a load on, on a really hot day. You can hear when it's engaged, there's no mistaking it. 
Replacing the fan probably isn't worth the trouble but futzing with the adjustment may net you a bit.
Trans_Maro wrote: Replacing the fan probably isn't worth the trouble but futzing with the adjustment may net you a bit.
Just want to add to this that when I added an electrical fan, the controller failed a few times, the sensor never really worked properly, and it had to be powered at ignition on because it kept running for too long after I shut it off due to where the sensor was.
A lot to play with, and money to spend, for maybe 0 gain.
Since you are good with fiberglass, you need to make something like this:
The top part would fasten to the front of the camper and come down to the roof of the truck. The side parts could clip to the doors and extend out to the edge of the camper. That would get rid of a lot of flat frontal area and keep air from between the cab and the camper.
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