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+--- Thread: Power Commander V question (/showthread.php?tid=4356)
Power Commander V question - HBFL_imp - 08-23-2022
Hi, I picked up a 2014 recently with the full Yosh system and a PCV installed. O2 eliminator installed. Stock intake. After some research here and on the Dynojet site, I was able to download the PCV app and the 3 maps they supply to the pc. I was curious to learn what map was on the device. The bike seemed a bit off to me between 2-3000 rpm. So to my surprise when I opened the map loaded on the PCV and clicked on fuel the grid was all zeros. My guess was some po made some mistake and deleted whatever map was on it. At any rate, I managed to load the map for stock bike with Yosh slip on. The bike immediately ran smoother and more responsively than prior. All this leads to my question which is when comparing the “stock bike” map to the one with Yosh slip on, I was surprised to see the stock map had almost all positive values ( adding fuel, correct?) and the map for the slip on had significantly more negative values ( reducing fuel, correct?). It seemed counterintuitive to me that creating more airflow with less restrictive exhaust, resulted in less fuel rather than more in this map. I’m sure I’ll try the stock intake/ exhaust map at some point just to see if drivability or perceived responsiveness is affected, but would like to understand the difference in these maps/values and how “ less is more” as it were. Any comments?
Thanks!
RE: Power Commander V question - jtopiso_imp - 08-23-2022
My guess is that the stock map, without O2 sensor, is running rich at low revs. It's designed to be trimmed down with the O2 sensor data.