Just like the title says, what are the Lambda values displayed on the Zeitronix?

 

Lambda is a A/F value of 14.64. So when you have a value of .8 lamba, you have:
14.64 x .8 = 11.71

 

why do they show both? (A/F, and Lambda)

 

I dont know why . But A/F is more easily understood when looking at it as you are running down the road

 

All right, thanks guys..

 

Why do they have kilometers per hour? Or millimeters for that matter? Some software platforms have the fuel tables set in lamda. For example the SCT stuff for Fords, uses all lambda calculations, where CMR uses actual fuel tables.

 

I see your point, I really did not look at it that why, but now I understand.

Thanks

 

i thought lambda was the A/F sensor before the cats? like the sensor in the headers

 

Yes, that's what we're talking about. There is a sensor in the downpipe BEFORE the cat and one AFTER the cat, on each side (total of 4). Lambda is the same thing as A/F ratio, just a converted value. It makes a lot of sense now that I think about it, I'm just not sure why they would bother showing both. It would be nice if the Zeitronix display was configurable.

Later,

 

^ ok thanks i just got a little confused

 

yeah if zetronix wanted to make their gauge really useful they'd replace lamda with fuel pressure or oil temp

 

They show both because lambda is a measurement relative to stoichiometric ratio for the type of fuel you're using.

For non-oxygenated gasoline, 1.0 lambda happens to be ~14.7:1.

For methanol, 1.0 lambda would be 6.4:1.

For other types of fuel, the stoichiometric ratios are different. Lambda allows you to measure air/fuel ratio independent of fuel type.

Beware that if you do run a different type of fuel, the meter would need to be recalibrated for the fuel type you are using. The meter cannot correct automatically.

 

BTW I'm selling my brand new, never used ZT-2 w/LCD screen
originally bought it to monitor my A/F for NA

I'm getting individual gauges for FI