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Old 10-21-2018, 03:55 PM   #191 (permalink)
AWD Efficiency <3
 
Join Date: Sep 2016
Location: Bicknell
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Steve - '99 Subaru Legacy L
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90 day: 26.8 mpg (US)

Little Red - '90 Geo Metro LSi
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Quote:
Originally Posted by freebeard View Post
With a proper 7 curve and fences you could have a Magic Butt Trumpet
That looks amazing. What about lights, though? No turns or brakes that I see.

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Old 11-05-2018, 03:39 PM   #192 (permalink)
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
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Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
Last 3: 51.27 mpg (US)

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This year's biggest "mod" ...




I borrowed that tonneau cover from a Miata-owning friend this summer with the intention of tuft testing it to see how it affects airflow.

Although I used it regularly, I never quite got around to doing the test.

But I'm pretty confident it helps somewhat, just based on the fact that there's noticeably less wind noise with the tonneau on than off.

With the tonneau off, these open areas at the sides seem to be where the wind noise is coming from:





I'd still like to tuft it, though. I haven't found any info about the aero effectiveness of the Miata in several searches. It'd be nice to contribute some new info to the Miata world.

But I'm about to quit driving the car for this year. MPG on the current tank is beginning to suffer from the colder weather - it's around 47 near the 3/4 mark.
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Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
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Old 11-12-2018, 09:46 AM   #193 (permalink)
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 20,774

Blackfly - '98 Geo Metro
Team Metro
Last 3: 70.09 mpg (US)

MPGiata - '90 Mazda Miata
Last 3: 51.27 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 60.34 mpg (US)
Thanks: 2,630
Thanked 5,537 Times in 2,840 Posts
hibernation start

The MPGiata has been retired for the winter!

There was nothing in the extended forecast that looked top-down friendly, and we've already had a few light snowfalls. (One of which needed shoveling; since melted).

The car turns 30 years old next spring. For its birthday present, I'm aiming to get a 55 mpg tank next year. Needs more mods!

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Latest mods test: 15 mods = 15% MPG improvement: A-B test, 2007 Honda Civic 1.8L, 5-speed
Ecodriving test:
Manual vs. automatic transmission MPG showdown: Nissan Micra 1.6L



EcoModder
has launched a forum for the efficient new Mitsubishi Mirage
www.MetroMPG.com - fuel efficiency info for Geo Metro owners
www.ForkenSwift.com - electric car conversion on a beer budget
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