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Old 01-15-2012, 02:52 PM   #41 (permalink)
jonEmetro's Avatar
Join Date: May 2009
Location: Ramona, CA
Posts: 12

geosynchronous - '96 Geo Metro lsi
90 day: 41.82 mpg (US)
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Great ideas everyone.
I have an idea for simple vacuum actuated valves. Ford uses coolant control valves inline with the heater core on their 90's Rangers and Explorers. They are strickly vacuum operated (no electrical) and I believe they open when vacuum is applied, which would mean that they would close when you turn your engine off and reopen upon startup.

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