A/F Ratio question

[oldstyle33]

I recently installed a Koso X2 guage which shows me a/f ratio, I have a MPI 180 turbo. At 1800 feet it shows 11.3 at idle. My question is when I give it more throttle will that increase or decrease that number.

What about when I ride in higher elevations at idle will it change the a/f ratio? Thanks for any input as I am new to boost.

 

[judger101]

i like to see 11.8 to 12 at wot. lower numbers mean richer and higher numbers mean lean. that seems rich at idle, i think my mcx idles at 13.5 to 14. 1/4 about 13 or so because you arent in the boost.

elevation will not change what you want your engine running at. you will want the same numbers regardless

im not an expert, but i think these are good safe ranges.

 

[snow4shover]

Where did you mount the O2 sensor? Before the turbo or after?
How long did you let the sled idle for?
One other thing did your calibrate the O2?

 

[oldstyle33]

Not quite sure on those answers as my yami dealer installed the guage, I did let it idle for about 5 minutes and today it read 11.8 I guess I would rather have to rich than lean, where should the O2 sensor be installed I am sure they followed the instructions?

 

[oldstyle33]

I was reading about calibrating the O2 sensor and the sensor they use is a self calibrating sensor it's the most acurate sensor out on the market according to Koso