Thread: D15B vs D15Z1
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Old 01-15-2012, 08:53 PM   #5 (permalink)
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Join Date: Jan 2008
Location: Western Wisconsin
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honda cb125 - '74 Honda CB 125 S1
90 day: 79.71 mpg (US)

green wedge - '81 Commuter Vehicles Inc. Commuti-Car

Blue VX - '93 Honda Civic VX
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Lean Burn is when the engine leans out the fuel to air ratio, Honda does this when the engine is under a light load, like while cruising down the highway, going from a standard 14.7:1 ratio to a ~20:1 ratio, allowing the engine to burn a lot less fuel after you get up to speed but to do this you need an ECU that allows this and you need a wide band o2 sensor, this is the 5 wire o2 sensor as it has a heater and more or less two different o2 sensors in one package.
A few people have swapped wiring harness so they can use the Civic VX ECU, and it seems like I saw a few of those on Ebay the other day, you would still need a button for that 3rd stage V-tec.
Getting the engine to fit in the car seems like more of an issue, but that is up to you and your skill set.
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