| Author | Message | ||
     Stuuk |
Hi Guys I've been playing with ecmread mono and tunerpro. Lets see if i have this correct The AFV is a multiplying factor that is applied across the whole fuel map. If the afv is 95 then each cell in the fuel map is effectively reduced to 95% of its base value. The afv is derived in learn mode from the average values from the O2 sensors. So why is it when I remove my inner airbox cover my afv's front and rear seem to drop around 5 units over time. I would expect that no inner airbox cover would equal more air. More air should indicate a leaner condition to the O2's. Therefore the ECU should be INCREASING the afv values to compensate shouldn't it????? Why does the afv reduce instead of increase? Thanks Stu | ||
| Badlionsfan |
Well, put the inner air box cover back on and see what happens. Even tho you'd think removing the inner air box cover increases air, fact is you're probably not getting the velocity you get with the inner cover on. Someone a while did some real testing, and I remember him saying the stock inner cover is really hard to improve on, so certainly throwing it in the corner of the garage can't be an improvement. I took mine of for about 100 miles a while back. Sounded cool, but ran like shit IMO. Reinstalled, went back to normal. | ||
| Froggy |
A wise man once said "What you expect and what happens often are not the same in life." The airbox is designed to be pressurized at speed. There is a bit of a science with it, and the Buell engineers knew what they were doing. Removing/modifying the lid alters the air flow characteristics, and probably contributed to your AFV adjustments. 95 is within the normal operating range for the bike, and also could be do to some other factor in your riding environment. | ||
| Gemini |
also might consider the engine may be getting warmer less dense air. less dense air needs less fuel |
