Richer mixture

[BrutalBusa]

If your air temp readings are based on resistance, why couldn't you determine the resistance value that makes the richest mixture. You could wire the properly rated ohm resistor on "flip switch" the same switch you use to arm your NO2 dry shot. If it works when you arm it you would send the ECM a signal telling it to fatten the mix before you hit the button. You may even be able to add enuff extra fuel to run a bigger dry shot (more than 40hp). Just a thought...courious to see what others think about. I know a power commander does this, but if my idea works it would be cheap alternative to a $300 add-on.

 

[PetriK]

Many car ECU:s work on closed loop and open loop principle, i.e. with light load low RPM the O2 sensor gives feedback to the ECU and sets the environment variable for optimum A/F ratio. When having high load high rpm conditions the ecu goes to open loop, i.e. using the variables learned during closed loop it optimises the mixture without O2 sensor. Just fooling the ecu to think its colder or warmer, may not work because of this "learning" of the correct mixture.

Usually you really need to tap in to the injector pulse during WOT conditions to create any effects.

I dont know if this above applies to Hayabusa ECU, is there any specialists on this topic around - would be interested to find out more of the topic !??!?

 

[straightshooter_la]

Hayabusa uses an open loop. No O2 sensor unless it came from EU.