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Registered
Join Date: Jun 2002
Location: Winnipeg, MB, Canada
Posts: 3,963
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My dads 74 Chevy had a air pump that pushed fresh air into the exhaust via a belt driven air pump. After the warrantee was over he removed it and plugged the holes in the exhaust manifolds. He gained about 2 mpg with the pump gone. When he sold the car it had about 300,000 miles on it so any increase in mpg was needed.
 No smog checks here....
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Bunch of old cars
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09-04-2016, 12:36 PM
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