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Old 02-27-2012, 10:05 AM   #4 (permalink)
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Blackfly - '98 Geo Metro
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Originally Posted by yostumpy View Post
Wallace has a full safari type roof rack fitted which I do use some times, and I'm thinking of cutting off the side upstands 75mm so that its flat, and then cutting it into 3 parts, with the 3 legs at the rear staying on, the middle section thrown away, and the front 3 leg section easily removable, and place where its needed. but as I use the truck for work. Do you think the partial removal will improve matters? I know its not the best testing ground in the world, as my driving is rarely a repetative commute.
A photo is worth some words. (Google image search for your rack style might help us understand what you're suggesting.) It's worth taking off a roof rack when not needed. You will decrease both frontal area and drag coefficient of the truck.

Savings will vary. EG: you can see a ~3% change here:

People can be funny about roof racks -- "removal-phobic". (Not saying that you are.)

I once recommended to a friend that he remove the rack from his new-to-him small hatchback car. (Keep in mind this friend is the type of person who is perpetually in debt and always complaining that he needs to find ways to economise.) I even did the math for him, pointing out how much gas and therefore money he'd save in a year (I think it was around $60). But he wouldn't take it off. Why? "Just in case" he needed to use it, it would have been a fussy job to re-install. I don't believe he ever has used it. That was about 3 years back, so $180 worth of fuel burned for nothing!

Anyway - welcome to the forum. Good luck with your efficiency efforts.
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: Oops, I did it again! Bought another cheap, 3-cylinder Mirage. Mods in progress...
Ecodriving test: Manual vs. automatic transmission MPG showdown

has launched a forum for the efficient new Mitsubishi Mirage - fuel efficiency info for Geo Metro owners - electric car conversion on a beer budget
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