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Old 05-11-2017, 02:47 PM   #2 (permalink)
MetroMPG
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Join Date: Nov 2007
Location: 1000 Islands, Ontario, Canada
Posts: 21,640

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

MPGiata - '90 Mazda Miata
90 day: 53.78 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 61.98 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)

Even Fancier Metro - '14 Mitsubishi Mirage top spec
90 day: 66.29 mpg (US)
Thanks: 3,394
Thanked 6,199 Times in 3,210 Posts
Mods & Tests index...

(This list is a work in progress - will be adding links to related threads.)

Transmission & engine

  • Installed transmission with taller final drive - 5.2% improvement
  • synthetic transaxle oil - untested
  • efficiency camshaft from XFi model installed March 2007 - untested
  • lower viscosity synthetic engine oil (at first: 5w30 2L + 0w20 1L), changed to full 0w20, summer 2006 - untested
  • timing advanced - untested
  • engine block / coolant heaters (on the Blackfly) - Update: April/07 installed additional 850w inline heater
  • alternator disable - ~10% improvement
  • warm air intake (WAI) - tested
  • K&N air filter (Busted! Removed & sold. See Testing a 'performance' air filter for MPG)

Aerodynamics

  • prototype removable boat tail - ~15.1% fuel economy improvement
  • partial grille block & rear wheel skirts - ~5.7% improvement
  • streamlined wheel covers - untested
  • deleted passenger outside mirror - ~2.3% improvement
  • Kammback hatchback extension - ~4.9% improvement
  • radio antenna repositioned - untested
  • gap filling around headlights - untested
  • hood/bumper gap sealed - untested
  • partial cowl block - untested
  • smooth undertray - ~2% improvement
  • gap filling around headlights - untested
  • massive cardboard air dam - tested

Other
  • tire pressure 38 psi (front) 36 (rear); boosted to 48/46 Feb/06; again to 52/48 fall/06 - tested
  • LRR tires (Bridgestone Potenza RE92 from 1st gen Insight)
  • lightweight 14 inch alloy wheels (with wheel discs)
  • aftermarket cruise control (only used for testing, or on flat roads)
  • new brake calipers (on Firefly #1 - the original ones were dragging slightly & replacement noticeably improved rolling resistance)
  • daytime running lights switch - so I can turn them off on a divided freeway, where DRL's safety contribution is lowest. (It's highest on undivided highways where there's an oncoming overtaking hazard, and where other cars are approaching your path at right angles - e.g. urban driving).
  • engine kill switch (to keep the ScanGauge alive if the engine is stopped while at rest or coasting)

Tools
  • a good tire pressure gauge
  • a ScanGauge
  • Accessing the brain trust at EcoModder.com
  • Books: Road Vehicle Aerodynamic Design by RH Barnard; Aerodynamics of Road Vehicles edited by Wolf-Heinrich Hucho
__________________
Latest mods: 3-cylinder Mitsubishi Mirage. EcoMods now in progress...
Ecodriving test:
Manual vs. automatic transmission MPG showdown



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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