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RE: Air/fuel ratio monitors

To: "'Deikis, John G'" <John.Deikis@va.gov>, <spridgets@autox.team.net>
Subject: RE: Air/fuel ratio monitors
From: "Duncan Sinclair" <duncan@pondhop.com>
Date: Thu, 26 Apr 2007 18:17:41 -0500
<< I'm thinking about monitoring my A/F ratio>>

I should have added that if you intend tuning for emissions then stoich (AFR
14.7)is what you are looking for and a regular narrow band sensor will work
fine.
If on the other hand you want to tune for power/performance then you really
want an AFR of around 12.5-13 which a narrow band sensor won't tell you
accurately but a WB02 sensor will.
Most modern ECU's are only interested in Stoich when in cruise (>200RPM,
Hot, Not WOT) so they work fine with narrow band.

Duncan




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