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Old 05-06-2008, 09:58 PM   #8 (permalink)
MetroMPG
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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
90 day: 52.8 mpg (US)

Winter beater Metro - '00 Chevrolet Metro
90 day: 73.57 mpg (US)

Fancy Metro - '14 Mitsubishi Mirage top spec
90 day: 58.72 mpg (US)
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I don't think you'll find any gain with a restrictor plate. Your butterfly valve is your restrictor plate. If you put something else upstream/downstream from there that forces you to open the throttle to compensate, you're not actually reducing pumping losses (if that's your goal). If your goal is to simply restrain how much power you use, you can do that with your brain & right foot .

You're heading in the right direction, looking @ your fuel log.
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