Quote:
Originally Posted by
bonjo
very interesting reading.
I take it you ran your tests without O2 sensor.
What would be interesting is also running it with the sensor. I wonder if the close loop fuelling will compensate for the different grade.
I know the XT's don't have a knock sensor so no auto timing adjustment. Would be interesting to know if 98 gives any power gain?
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Tests carried out with a 01 ECU with no O2 sensor. With a O2 sensor I would expect the O2 sensor to lean the A/F ratio out 14.7:1 when it is in the closed loop circuit.
One thing I have also found using the same fuel grade, is my mapping is getting richer & richer the colder the ambient air temp becomes. The difference between 20 degrees C & 10 degrees C is 2% richer @ 10C.