Quote:
Originally posted by 911Mac
The nice thing about the wide band O2 is that you set the ECU target AFR wherever you want it, our cars seem to run better with the AFR a little richer than 14.7 to 1. A narrow band O2 sensor can really only tell you if you're higher or lower than 14.7 to 1, both above and below that point it's not very accurate. The wide band O2 sensor is much more accurate, you can tell how rich or lean the engine is running. I also opted for one with a continuous display so I can tell what the AFR is while I'm driving. Kind of a peace-of-mind thing.
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The other thing to consider is using an LM-1 or PLX Devices O2 contrioller, which you can connect to the Megsquirt ECU. This will allow you to use the "autotune" feature of the MS software. It's a small investment of about $300 bucks, but well worth it. I have the PLX Devices unit and it has an LED readout of the A/F ratio.