What do you guys think about this concept?
http://www.factorypro.com/dyno/4gasEGAvso2sensor.html

Here is the beginning of the article in the above link:
"When you have had some tuning experience and have seen, firsthand, the problems that "tuning to an AFR" procedures create - and have seen how often the better reputation "AFR tuners" deviate from "the right AFR" in order to end up with a perfect running engine, the following subjects will make sense.
While an "AFR tuner" can indeed end up with smooth running and best power, the process is significantly different, more difficult and far more time consuming than what every other dyno companies will tell you when they are "selling" you a dyno with a "tune to an AFR" scheme.

Current engine tuning's widespread, low level "theory" is that tuning to "some desired AFR value" will result in clean and smooth running and make the best possible power from an engine. The reality is that once it's tuned to some arbitrary, perfect "AFR" value, you have to (or at least "should") go back through the rpms and throttle positions and literally poke and prod the "perfect AFR" values to make the engine run, if not to best power, at least till the engine runs smoothly."

 

interesting

 

The gas analyzers is how I tune the mototrcycles (AFM style bikes mostly not too many vtwin Harleys). Works phenomenal. Did it once with an EG that had an H22 in it. I will have to dig up the charted recordings for it. Very accurate way to tune.

Jason