EGTTemperatures

Exhaust Gas Temperature

Temperature of exhaust gases. Extremely high EGT indicates lean fueling, excessive timing, or insufficient cooling.

Why it matters

High EGT can damage the turbo, catalytic converter, and exhaust components. It is an indicator of combustion health.

What to look for

EGT varies by engine but generally above 1,600F is a warning. Sustained above 1,800F is critical.

Related terms

Air-Fuel RatioAFR

The ratio of air to fuel in the combustion chamber. Lower number = richer (more fuel). Higher number = leaner (less fuel).

Ignition Timing

How many degrees before the piston reaches top dead center the spark fires. More advance = more power, but too much causes knock.

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