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Old 09-27-2018, 03:55 PM   #1 (permalink)
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 22,459

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

MPGiata - '90 Mazda Miata
90 day: 55.97 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 70.75 mpg (US)

Appliance car - '14 Mitsubishi Mirage ES (base)
90 day: 67.41 mpg (US)
Thanks: 3,997
Thanked 6,889 Times in 3,574 Posts
Smile 5-minute DIY: cockpit-adjustable variable grille block (1-way)

Step 1...

Coroplast blocking plate over existing custom-sized grille opening. Note actuator linkage leading to cockpit.

Step 2...

Monitor coolant temperature while under way. At desired temperature, manipulate actuator.

Step 3...

Step 4 ...


Step 5...

Et voila!



1) Best suited to convertible or sunroof-equipped vehicles.

2) The first time I pulled the rip cord, I was going about 50 km/h (30 mph). Too fast! It flew over the cockpit and almost snapped the actuator linkage! Next time I tried around 15 km/h. Still too fast!

3) You don't want to be too concerned about the finish on the aft end of your vehicle -- the grille block will bounce & flap around back there before you get it reeled in.

Despite the silliness, it works. Speeds warm-up time, and improves aero. It was used on the last part of my recent record tank:

53 MPG tank in 1990 Mazda Miata: personal best (4.5 L/100 km)

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Project MPGiata! Mods for getting 50+ MPG from a 1990 Miata
Honda mods: Ecomodding my $800 Honda Fit 5-speed beater
Mitsu mods: 70 MPG in my ecomodded, dirt cheap, 3-cylinder Mirage.
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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The Following 7 Users Say Thank You to MetroMPG For This Useful Post:
aerohead (09-29-2018), Daox (09-27-2018), Ecky (09-28-2018), Gasoline Fumes (09-27-2018), Joggernot (10-01-2018), mpg_numbers_guy (09-27-2018), ThermionicScott (09-27-2018)