I'm using the PLX SM-AFR too. I only plan to use it for tuning so I haven't
bought the matching gauge. The SM-AFR has both digital and analog outputs
so I've connected the analog output to an old volt meter for monitoring
purposes. On the 5V scale you can get indications of AFR from 10 to 20.
Also bought a kit that would interface the output to the parallel port of a
computer. Had to revive my old steam-powered laptop so I would have a
parallel port to connect it to. Plan to use that with associated software
package to log AFR while driving with both eyes on the road.
- Will B382001570
____________________________
Will Seay w_seay@embarqmail.com
----- Original Message -----
From: "Smit, Theo" <Theo.Smit@dynastream.com>
To: "Sandy Ganz" <sganz@pacbell.net>; "Thomas Witt"
<atwittsend@verizon.net>; <tigers@autox.team.net>
Sent: Wednesday, September 16, 2009 5:28 PM
Subject: Re: [Tigers] Now They tell Me!
I have the PLX setup (SM-AFR + DM-5 gauge) and it works well. As Sandy
says, you want wideband for tuning. Narrowband lambda sensors are only
good in a feedback system where the computer tries to drive the system
to 14.7:1
Theo
> -----Original Message-----
> From: tigers-bounces@autox.team.net
> [mailto:tigers-bounces@autox.team.net] On Behalf Of Sandy Ganz
> Sent: September 16, 2009 3:02 PM
> To: Thomas Witt; tigers@autox.team.net
> Subject: Re: [Tigers] Now They tell Me!
>
> Wideband O2 kits are around on the web, but the pre-fabbed
> ones not that bad of a price anymore. This place has been
> around for years -
>
> http://wbo2.com/
> The signal conditioning for WBO2 is complex (look at the
> schematics for the wbo2.com prods, they should still be
> around on the site) A narrow band 02 is less useful since
> it's really is designed to tell you if it's at 14.7:1. They
> are much simpler to interface to but much less useful from
> data logging and tuning. If the schematic for the sensor
> looks simple it's not likely very accurate other then for
> relative measurements IMO.
>
> Sandy
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