According to the above tables, the correction at all altitudes is approximately :
• -5% for an increase of temperature of 15°C with respect to ISA temperature, and
• -10% for an increase of temperature of 30°C with respect to ISA temperatures.
• +5% for a decrease of temperature of 15°C with respect to ISA temperature, and
• +10% for a decrease of temperature of 30°C with respect to ISA temperatures.
Source : Rotax Operator’s Manual, Ref. OM-914