On Sun, 23 Dec 2001, Peter Macholdt wrote:
> I'm looking for a low-cost method to assemble an air/fuel measurement
> system. I can get a gauge from Summit Racing for $30 and an oxygen sensor
> from Whitney for $22. Add a few bucks for a weld in bung and the whole
> thing is around $60. The least expensive complete system I could find was
> about $130.
There are many web sites that feature articles on "building your own air
fuel monitor", one example is:
www.pelicanparts.com/techarticles/mult)air_fuel_monitor/mult_air_fuel_monitor.htm
(sory about the long URL).
It is way cheaper to build your own...
> I have 2 questions for the list. Can I mix and match sensors and gauges, or
> will there be a compatibility problem? Is there any advantage to a platinum
> tip or is that just a gimmick?
The air/fuel sensor is basically a "lambda sensor". You get 1v for
stochaic, more or less voltage for rich/lean readings. You theoritically
can mix/match, but you need to know what the "internal workings" are to
get things to be accurate. Most of these units use the LM3915 chip, so
these would all be compatible.
As for the lambda sensor itself, your best bet is probably a heated
sensor, but these are more money. Also note that these guages are not
suitable for use in a "lead" environment, so having a plug for your
standard bung tap is probably a good idea if you ever run race fuel.
> TIA,
> Peter
> '68 TR250
regards,
rml
TR6's
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