[Gmecm] Re: Fuel economy

[gary]

NB more sensitive at what ratio?  On what WB sites are you referring
to?  The NB sensor is a switch centering around, and being most
sensitive at stoich.  It's sensitivity deteriorates the farther from stoich
(either direction) the AFR.  There are NB O2 sensor voltage to AFR
curve charts on the net, that verify this.  By design, NB sensors need
not be accurate at AFRs away from stoichiometric.

Theory, in this case unfounded.  There is WB O2 sensor technology
however, that allows for PCM closed loop operation at ratios leaner
(or richer) than stoich.

GAS

----- Original Message ----- 
From: "Cowen" <captain_krill at yahoo.com>
To: <gmecm at diy-efi.org>
Sent: Wednesday, September 14, 2005 6:25 PM
Subject: [Gmecm] Re: Fuel economy


> Darrell,
> Take a look at what the guys on the Wide Band O2 sensor sites
> are saying about fuel economy.  Our narrow band OEM O2
> sensors are most sensitive at a fuel ratio slightly richer than optimal
> for economy.  One theory is, if you can get your O2 sensor to
> work at leaner ratios, maybe you can tune for better economy.