Quote:
Originally Posted by JohnnyGrey
Using a wideband to lean out your mixture involves setting the gauge or driving unit to produce a 0-5 linear AFR voltage. This voltage must be fed to a switching circuit that produces 0v when the input voltage is above a certain threshold and 0.9v when the input voltage is below a certain threshold. In effect, you're deciding at what ratio you tell the ECU it's running lean or rich. The result is you train the ECU around a ratio of your liking.
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The Innovate Motorsports LC-1 can be calibrated to output a custom 0-1 volt signal, as can other units on the market. It is much easier to buy an inexpensive feature rich wideband and then pointy-clicky the desired output with a computer than it is to build an op-amp circuit and correctly tweak it to work as you wish.
Quote:
Originally Posted by JohnnyGrey
Though I cruise as lean as 18:1:1, I find that 16.2:1 produces the best economy for my vehicle.
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Makes sense, combustion pressures fall way off in the 17:1 or higher range.