![]() Through the course of each run, the spark plugs melt from the incredible amount of heat coming from the combustion chamber. The sheer amount of fuel being injected into the combustion chamber allows for adequate cooling. So how do they not instantly overheat? Another unique advantage of nitromethane is that it has an incredibly high latent heat of vaporization, which means it can absorb a massive amount of engine heat as it vaporizes. These dragster motors don’t have any cooling radiators. This staggering fuel consumption not only makes big power, but also cools the engine. ![]() Top Fuel dragsters are unsurprisingly thirsty machines, burning anywhere from 16 to 23 gallons of fuel throughout warmup, burnout, staging, and a four-second run. Ergo, you can burn a lot more nitro in the combustion chamber, leading to much more power from every explosion inside the engine. However, nitromethane is actually much less volatile than gasoline. This alternative “top fuel” (hence the name) is essentially gasoline that’s been pre-mixed with nitrous oxide. Starting with fuel, these race cars use nitromethane instead of gasoline.
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