this is going a bit off topic but ah well,

my stockish calibration has got coolant temp corrections of like +20% fuel open loop,high load at up to 76 degrees C,so id say that would be fairly similar with the stock honda calibration.

also on these cold nights,my temp gauge with sender mounted in top radiator hose is seeing up to 13 degC less then actual coolant temp according to the ECT,prob due to cold air flow over the sender unit.So do your readings on a warm day if reading off a gauge.