HomeCalculatorsExhaust-to-Intake Temperature Ratio

Exhaust-to-Intake Temperature Ratio

Ratio of exhaust-gas to charge-air temperature - a sensitive indicator of cylinder fuel balance, valve timing and cooler performance.

EngineExhaustDiagnostics
T_exh / T_in (K/K)
2.179 -
Status
Normal
Formula, assumptions, and limits

Uses absolute Kelvin. For slow-speed at MCR expect 2.0–2.3. Two-stroke units with water-side CAC fouling show declining r_T over months as intake T rises.

Symbol legend

SymbolMeaningUnitSource
After-valve exhaust temperature°Cthermocouple
Receiver charge-air T°Cthermocouple