Exhaust Gas Temperature Calculator

Estimate exhaust gas temperature (EGT) based on air-fuel ratio, ignition timing, and boost pressure for engine tuning safety.

Input Parameters

Results

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Estimated EGT
°F
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EGT Safety Status
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Combustion Efficiency
%
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Safety Margin
°F
Note: EGT above 1600°F risks exhaust valve damage, turbo failure, and pre-ignition. Richer AFR (11.5-12.5:1) and optimal timing keep EGT in check.

Reference

EGT = Base(1200) + AFR_effect + Timing_effect + Boost_effect + RPM_effect AFR Effect = (14.7 - AFR) x 40 (richer = cooler) Timing Effect = (32 - Timing) x 15 (retarded = hotter) Boost Effect = Boost x 12 Max Safe EGT: ~1650°F for most applications