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Author Message   Kdogshirow Posted on Wednesday, September 28, 2011 - 06:05 pm:        I am sure this has been covered before......But here we go anyways- What is the Optimum number setting for max & min AFV ? What is a bad AFV number ? If you set your AFV max & min number on the high side , such as 150 max and 110 min , how will it effect how your bike runs ? Will it run a little richer ?   Johnboy777 Posted on Wednesday, September 28, 2011 - 07:43 pm:        My AFV min. is set at 109 via ECMspy, with an Xopti map and it runs pretty well that way. For me, richer works better. .   Froggy Posted on Wednesday, September 28, 2011 - 07:58 pm:        quote: What is the Optimum number setting for max & min AFV ? Anything. quote: What is a bad AFV number ? There is no bad, but if your bike is trying to run at 130 when it should be at 110, you will have issues. quote: If you set your AFV max & min number on the high side , such as 150 max and 110 min , how will it effect how your bike runs ? Will it run a little richer ? If you change the minimum to 110, it cannot run below 110 anymore, and as result will be richer. The AFV, or Adaptive Fuel Value is a global modifier to the fuel map based on input from various sensors on your bike. These sensors are designed to compensate for things like thinner air at higher altitude. If your AFV is at 100, that means there are no changes being made, and your bike is being fueled exactly as determined by the base map. When your AFV is 110, that means you are receiving 10% more fuel than the base map specifies. Likewise, if the AFV is 90, you are receiving 10% less fuel. Most bikes on normal day to day operation will see the number be between 90 and 110. If you live at a higher altitude, you may normally see lower numbers like 85. This is normal and the bike is working as intended. If you have an issue, like a failing O2 sensor, it can report incorrectly to the ECM, and it may cause your bike to run at say 150 when it should be at 105. This will cause the bike to run like crap, and drink gas, and potentially foul plugs. Ideally, if your fuel map is perfect and your bike does not run rich or lean, your AFV will stay at roughly 100. Many will play with their fuel map in ECMspy, and end up making it too rich, and as result the bike will try and compensate by lowering the AFV. This ends up leading to driveability issues as now it will be too lean in other spots to compensate for the excessive richness in one spot. I recommend either disabling the O2 sensor or locking the AFV min and max to 100 if you are doing your own tuning, that way you can develop the map without the computer trying to re-adjust itself.   Hogs Posted on Wednesday, September 28, 2011 - 09:38 pm:        Thanks Froggy, I think I just went back to school there...great Info...   Kdogshirow Posted on Wednesday, September 28, 2011 - 11:07 pm:        Thanks Froggy , GREAT info . Easy to understand .

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