>>Second is an air/fuel ratio monitor which hooks up to your O2 sensor
>>and graphically depicts your air/fuel ratio under any conditions (idle,
>>part throttle, full throttle, etc.).  There are three different
>>versions ranging from $99 to $169, and can either be permanently or
>>temporarily mounted.
>
>Would this just be a limited range dc voltmeter ?
>
>Austin

It probably works on that concept, however it uses different colored
LEDs (green, yellow, red) in sequence to indicate the ratio, with
numerals under the LEDS.  For those engines with more than one O2
sensor, it can monitor both at the same time(it has two sets of LEDs).
I read and understood the concept of using a DVM hooked up to the leads
of your O2 sensor to set A/F ratio, I suppose this is a more Hi Tech
approach.  I don't know how critical A/F ratio in the different ranges
of operation is in getting optimal performance out of the waterboxer,
and I am in no way pushing this particular product.  I just though I'd
throw it out there that these things are available.

Scott
'84 Westy
Rockville, MD