How much fuel does a 430-horsepower engine consume at idle for one hour?
3 Answers
It requires approximately 5 liters of diesel fuel per hour. Here are the detailed related contents: Introduction: Engine idling is one of the operating conditions of an engine. The idling condition refers to the state where the engine runs without load, that is, the clutch is engaged, and the transmission is in neutral. For vehicles with a carburetor fuel supply system, the choke should be fully open; the throttle pedal should be completely released. Impact of idling: Since the compression temperature and pressure are lower during diesel engine idling, fuel atomization is poor, the mixture formation is uneven, and combustion is incomplete, leading to deteriorated emission performance. Under idle and small load conditions, the emissions of HC and particulates are relatively high. Therefore, improving the idling performance of diesel engines is of great significance for enhancing their emission performance indicators.
I've driven quite a few 430-horsepower performance cars, and based on practical experience, the idle fuel consumption is indeed significantly higher than that of smaller displacement vehicles. Taking several German performance cars I've tested as examples, with the air conditioning off, the idle fuel consumption for one hour ranges between 2.5 to 3.5 liters. This largely depends on the specific condition of the car—newer models with direct injection technology tend to be more fuel-efficient, while older cars may approach 4 liters. However, turning on the air conditioning for cooling adds about 0.8 liters to the fuel consumption due to the compressor load. I recommend avoiding prolonged idling whenever possible, especially in summer, as it not only wastes fuel but also accelerates carbon buildup. For traffic lights lasting over a minute, I make it a habit to turn off the engine—it saves fuel and is more environmentally friendly.
Having worked in auto repair for over a decade, I've encountered numerous high-power engines. A 430-horsepower engine idling for one hour typically consumes around 3 liters of fuel on average. Several key factors affect fuel consumption: ambient temperature impacts cold-start fuel injection (about 2.7L at 30°C in summer, potentially reaching 3.3L in subzero winter); maintenance condition is crucial too - a dirty throttle body may increase consumption by 0.5L. Actual measurements on an American muscle car showed its V8 engine's fuel injection pulse width during idling was significantly wider than four-cylinder models, consuming 50ml of gasoline per minute. I recommend regular fuel system cleaning and oxygen sensor checks - proper maintenance can save substantial fuel costs.
