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Adjusts dyno horsepower readings for atmospheric conditions enabling fair comparison. Standards equalize weather effects.
Formula
Higher altitude/temperature = lower correction
Guida passo passo
- 1Temperature, altitude, humidity affect air density
- 2SAE standard: 60°F, 29.92" Hg, 50% humidity
- 3Correction formula: actual power × (reference air density ÷ test air density)
- 4Higher altitude/temperature = lower correction
Esempi risolti
Ingresso
Altitude 5000ft
Risultato
+5% power
Errori comuni da evitare
- ✕Comparing raw dyno numbers without correction
- ✕Not accounting for different dyno types (chassis vs. engine)
Domande frequenti
Why do dyno results vary between locations?
Air density differs; altitude, temperature, humidity all affect engine breathing and power output.
How much does weather affect horsepower?
10-15% variation possible between ideal conditions and hot/high-altitude days.
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