08-17-2017, 02:36 AM
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#1 (permalink)
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EcoModding Lurker
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Great success with airdam on '98 Odyssey
I recently bought a great condition '98 Odyssey with 120,000 km on it. Great van, but wow, the underbody is absolutely horrible '
I bought a 6" strip of ABS, cut and drilled and bent and installed and have achieved a 16% improvement in fuel efficiency on the highway! This has paid for itself in a tank and a half of gas!
Pics to follow!
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08-17-2017, 02:42 AM
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#2 (permalink)
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08-17-2017, 02:44 AM
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#3 (permalink)
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This is how ugly the underside is!
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08-17-2017, 02:50 AM
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#4 (permalink)
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Next steps will be upper grille block, seal gaps and block off the edges of the lower grille that are not directly in front of the radiator. Also may add a belly pan up front that will shoot a bit past the dam and act as a splitter. This will allow spats in front of the front wheels.
So much potential on this great van!
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08-17-2017, 04:54 AM
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#5 (permalink)
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Nice work. Did you heat the ends to get them to hold the bend?
It will be interesting to see if the 16% holds up over time. Sometimes barometric pressure and other things can affect mileage in the short term.
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08-17-2017, 07:23 AM
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#6 (permalink)
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Too many cars
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Nice job, looks great! My parents have a '97, rebadged by Isuzu. I had a splitter on it for a while, but it eventually fell apart. I agree, the undersides of these vans are really bad!
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08-17-2017, 11:30 AM
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#7 (permalink)
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Quote:
Originally Posted by freebeard
Nice work.
Did you heat the ends to get them to hold the bend?
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Those were my first two thoughts as well.
The material fatigue of bending without heat would be too much in the long term I suspect.
Super clean installation, professional looking.
I still favor my conveyor belt material, it has flexed when pulling off of parking curbs. Just a tiny bit on one corner caught a few times, but a harder material would have stressed out and maybe failed by now.
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You cannot sell aerodynamics in a can............
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08-17-2017, 01:10 PM
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#8 (permalink)
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Thanks guys.
All bends are heat bent. The drill holes will go a long way to prevent cracking, and ABS is highly impact resistant, but not like conveyor belt.
Trying to follow the 80/20 rule and stick to big wins on this one, but it is tempting to go whole hog and belly pan the whole thing. Fortunately time is a big limiting factor. :-)
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08-17-2017, 03:05 PM
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#9 (permalink)
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Batman Junior
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Nice work, westygo!
How did you calculate the percent improvement?
Also: you must have one of the lowest post frequencies around here. (Join date June 2009! ) But you make up for the lack of volume with quality.
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08-17-2017, 04:52 PM
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#10 (permalink)
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Thanks Metro MPG for the compliments.
Nope, I don't post much :-)
I keep tabs on every tank. Prior to installing the air dam, my best tank ever was 9.8 L/100km on a road trip. I repeated the road trip with the same cargo and same two bikes on the back same driving style same weather etc, and achieved 8.2 L/100km. Pretty sure that works out to a 16.4% difference.
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