According to standard ASTM D2699(RON), Intake Air Temperature(IAT) is set 52±1°C (125 ± 2°F) is specified for operation at standard barometric pressure of 101.0 kPa (29.92 in. Hg).
According to standard ASTM D2700(MON), Intake Air Temperature(IAT) is set 38 ±2.8°C (100±5°F), Intake Mixture Temperature—149±1°C (300 ±2°F) maintained within 1°C (62°F) when CR or KI results used for octane determination on each fuel are collected.
It's very convenient to set the Intake temperatures on Octane engine FTC-M2
. Intake temperature is set automatically as the test method(Research/Motor) is chose.