[Richard L]

I understand you concised data, great to put it to the test.

The effect of inlet cooling is self-regulated. Initially, hot air will be cooled by evaporation until the 100% RH is reached. No further drop in temperature is expected.

The un-evaporated water will carry into the cylinders and then further evaporated during combustion - at temperature over 2000C, 100% RH will not be reached that easily. So the only way you can monitor the action of water is by reading the EGT.

If you are using an accelerometer, it will help to determine the force the engine produces at all RPM rather just reading the peak HP (meaningless) as peak HP is limited buy mechical set up.

I woudl test you engine's acceleration in the mid range area rather the top end.