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Eddy,As others have mentioned above, to use any wideband sensor you still need a dedicated wideband controller because the Motec ECU is expecting a simple analog VDC "signal".In the case of typical narrow band sensors they provide this directly with an output of ~ 0.1 or 0.9 vdc depending on whether they sense a mixture above or below stoichiometric. However, no wideband sensor on the market has a simple linear voltage output, so they must be used with a special "controller" which runs the sensor's internal heater as well as reading the sensor and translating that to a roughly linear vdc output. The ECU must then be programmed to match the voltage vs mixture (lambda) slope produced by the controller. As with many automotive inputs a typical range is 0-5 volts though not all controllers support that range. Hopefully the Motec ECU allows multiple data points on the curve since none of the controllers have a truly linear output.As you said, the Motec Lambda meter is pricey. I bought one awhile back and am generally happy with it but more recently there is a new one on the market which I also just received but have not yet used. I have high hopes for it because they use a new approach to reading the sensor which is theoretically more accurate and yet their price is around $350 including sensor. They are NOT yet another clone of the old DIY project or a variant thereof. Personally I still don’t care for those.Unfortunately I don't have the link here at work but I'll post it later. And of course there are other options such as the popular FJO and the aforementioned DIY spin-offs, and I think AEM has one now as well but I've not heard much about the features (such as free-air recalibration) or accuracy.
Eddy,
As others have mentioned above, to use any wideband sensor you still need a dedicated wideband controller because the Motec ECU is expecting a simple analog VDC "signal".
In the case of typical narrow band sensors they provide this directly with an output of ~ 0.1 or 0.9 vdc depending on whether they sense a mixture above or below stoichiometric.
However, no wideband sensor on the market has a simple linear voltage output, so they must be used with a special "controller" which runs the sensor's internal heater as well as reading the sensor and translating that to a roughly linear vdc output. The ECU must then be programmed to match the voltage vs mixture (lambda) slope produced by the controller. As with many automotive inputs a typical range is 0-5 volts though not all controllers support that range. Hopefully the Motec ECU allows multiple data points on the curve since none of the controllers have a truly linear output.
As you said, the Motec Lambda meter is pricey. I bought one awhile back and am generally happy with it but more recently there is a new one on the market which I also just received but have not yet used. I have high hopes for it because they use a new approach to reading the sensor which is theoretically more accurate and yet their price is around $350 including sensor. They are NOT yet another clone of the old DIY project or a variant thereof. Personally I still don’t care for those.
Unfortunately I don't have the link here at work but I'll post it later. And of course there are other options such as the popular FJO and the aforementioned DIY spin-offs, and I think AEM has one now as well but I've not heard much about the features (such as free-air recalibration) or accuracy.
