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
----- Original
Message ----
From: Thomas Witt <atwittsend@verizon.net>
To:
tigers@autox.team.net
Sent: Wednesday, September 16, 2009 12:52:24 PM
Subject:
Re: [Tigers] Now They tell Me!
>>> It is part of my multi LED air-fuel ratio
under-dash meter. Here is one ... for $240, ... $136, ... $162<<<
Or..., for
those who "Love the smell of rosin flux in the morning" there are a number of
web sites where you can build your own. I'm guessing for about $50. As Steve
said it is basically a bung welded in to the exhaust, and a generic O2
sensor. The sites illustrate the few components needs to amplify the signal
and trigger an array of LED's. Like everything in my life it is something I'm
going to build - some day. I don't think Heath Kit as we knew it as kids is
still around. This seems like something they would have sold.
I wouldn't
doubt today someone also has designed an adapter (USB or Serial 9 pin) and a
free program to read the O2 sensor output on your laptop with the same results
as the LEDs. For sure there are programs that read to the laptop like an OBD
scanner from the cars computer. But here, - with a carburetor, things would be
different just to read the O2 sensor.
Tom
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