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I've built the Jaycar IEBC for the new Stagea (which should be arriving in Sydney today!!) and am looking at the DFA. However, you obviously need to monitor the A/F ratio. Now, looking at the meters out there, I see "wide-band" and "narrow-band" sensors/meters. Can anyone explain the difference? And which do I need?

If I need the wide-band, (damn they're expensive) does anyone know where to get them cheaply, or where to hire them?

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https://www.sau.com.au/forums/topic/68642-af-meters/
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