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[GtreetSlide]

On an 09 103, Tuning with an older version of mastertune I got mostly white cells and bike ran great. The inside muffler color was a medium gray. I installed a new style air cleaner and decided to retune (with latest version of TTS). Most of the formerly white cells were now shades of pink to redish and the VEs all came down across the board. (Working with mt7 maps only). My exhaust is beige to almost white now and bike appears to be running much leaner and warmer.

I thought with earlier versions and all cells set to 14.6 that the Closed Loop Bias table was incorporated during the Vtune process. Is there any way that those tables could be ignored in newer software versons when AFR was set to 14.6? ie; could the tune be setting the 14.6 tables to a real 14.6 instead of altered with the CLB tables?

Thanks, Jim

[Steve Cole]

Vtune is no different now then it has been for the past three years, so that's not it. Did you start with a new calibration or did you use the old one to start with?

[GtreetSlide]

I used an older calibration that had been vtuned several times previously. An MT7 file. It ran really well with great power and mpg. All I changed was the air cleaner. Went from an SE air cleaner to a heavy breather. The outside air conditions were very different. The last Vtunes done with the SE were in late August and the new ones done in May (SD) so there was probably a 15-20 degree difference in outside air and humidity may be way different. It still runs good, just looks to be a little leaner by VEs and exhaust color. I don't think it's a big issue, just trying to grasp why and think I may have some missconceptions about how everything enteracts. I thought that VEs higher means more air entered and therefore more fuel is added.

It's one of those "can't see my shoes for my belly" type situations.

Thanks, jb

[Steve Cole]

One needs to remember that the ECM in the bike is what sends the information out to us. Since the running conditions will change each and everyday the ECM will constantly adjust for it. Vtune is going to see those adjustments and record them for you. A major thing that many donot understand is the ECM always trys to maintain the same fuel mixture unless YOU change its target. So as the weather changes the ECM makes corrections to the VE tables via the AFV and closed loop corrections.