However, I have found a small matter that needs to be made clear before
the water injection system is installed. I noticed when looking at the log that
I made today, that the ECU was pulling fuel under steady running, so that
the AFR was made leaner than my target AFR
When I investigated the cause, I found that the ECU Manifold Air Temperature
correction table was the reason for the trim. It is the same table that I used
for my N.A. engine. The Aux Temp sensor is located in the S/C discharge
manifold and is only for logging. The MAT sensor is located in the intake
manifold, and is an ECU input. At the time of making this log the intake air to
the engine would have been about 20degC.
So what is the best way to avoid having the ECU pull fuel with a S/C engine ?
Simply set the correction table to zero at all temps and rely on the fuel map
alone to maintain correct AFR's ? Any advice appreciated.
Cheers... jondee86