Wideband Lambda units.
Wideband Lambda kit.
Sample screen with 5% difference in the
settings shown (Yamaha R6 03 kitted).
Tuned Suzuki Gsxr 1000
Red graph shows power when the bike
came in with a fuel mapping the owner had made himself by experimenting on a Dyno without lambda data.
Blue graph shows the end result after optimizing the
fuel mapping with the aid of the wideband lambda.
Here are the Air/Fuel ratio graphs from
the two tests, the red graph clearly shows the extremly rich mapping.
Red graph shows Air/Fuel ratio of the
std. bike with full race race exhaust before any mapping work was done, and the
blue one after optimizing the fuel map on the Power Commander unit attached.
And for just for
comparison a typical example of a heavily filtered A/F graphs from another well
known Dyno maker.
With this lack of
resolution it's obvious that you have no chance to find those tricky rich / lean
spots that show up for maybe only a couple of hundreds of Rpm.