cmc133 Posted January 10, 2009 Report Share Posted January 10, 2009 Can anyone explain the accuracy of narrow band air/fuel meter? I have an Autometer sport comp air/fuel ratio meter & it shows lean always. Quote Link to comment Share on other sites More sharing options...
dozer Posted January 10, 2009 Report Share Posted January 10, 2009 They are worthless for boost tuning. With a narrow band it is 0 volt-1 volt sensor. The way they work is it knows what 14.68:1 AFR is and can basically tell you if your above (rich) or below (lean) 14.68:1 AFR but not by how much accurately. Some people use stock narrow band o2 mv to with im not one of them. A wideband O2 is a 0-5 volt sensor and can read actual AFR from about 9:1 AFR to 20:1 depending on brand. I would only use a wideband for boost tuning. Quote Link to comment Share on other sites More sharing options...
cmc133 Posted January 10, 2009 Author Report Share Posted January 10, 2009 They are worthless for boost tuning. With a narrow band it is 0 volt-1 volt sensor. The way they work is it knows what 14.68:1 AFR is and can basically tell you if your above (rich) or below (lean) 14.68:1 AFR but not by how much accurately. Some people use stock narrow band o2 mv to with im not one of them. A wideband O2 is a 0-5 volt sensor and can read actual AFR from about 9:1 AFR to 20:1 depending on brand. I would only use a wideband for boost tuning. Quote Link to comment Share on other sites More sharing options...
cmc133 Posted January 10, 2009 Author Report Share Posted January 10, 2009 Thanks. AS you can tell I am new at this site. the GMC C3 I bought has an Autometer sport-comp meter. truck has magnacharger. I am still trying to learn what all the parts are etc. The best I can determine this meter is a narrow band meter.. and it seems worthless so far.. Quote Link to comment Share on other sites More sharing options...
dozer Posted January 10, 2009 Report Share Posted January 10, 2009 I would recommend getting a wideband and swap out the narrow band then you can start tuning. CLICK Quote Link to comment Share on other sites More sharing options...
cmc133 Posted January 10, 2009 Author Report Share Posted January 10, 2009 thanks again... Quote Link to comment Share on other sites More sharing options...
BigCountry Posted January 10, 2009 Report Share Posted January 10, 2009 i'd stay outta boost if it's showing lean to be on the safe side. put a 2x4 under the acc pedal. Quote Link to comment Share on other sites More sharing options...
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