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SVTPerformance's Chain of Restaurants
Road Side Pub
Pop quiz: Why do boosted engines need a more powerful spark?
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<blockquote data-quote="James Snover" data-source="post: 16195035" data-attributes="member: 67454"><p>Take any given volume of air he right ratio to burn. The more you compress it, the more it wants to burn. And not just from the heat of compression, the more tightly you pack the oxidizer and the fuel, the more likely it is going to burn.</p><p></p><p>That being the case, why do boosted engines, in general, those burning gasoline or alcohol*, need a more powerful spark? It is true that they do need a more powerful spark, that is no misconception. Or else the airfuel mixture fails to burn.</p><p></p><p>You hear a lot of incorrect things, like, "The boost blows the spark out." Nope. Completely wrong.</p><p></p><p>*Hydrogen-burning does not count, in this example. Because Hydrogen is damn strange stuff. You don't need a spark to make Hydrogen burn, and it has the widest air-fuel ratio of any fuel, and it can either burn or detonate, under identical conditions.</p></blockquote><p></p>
[QUOTE="James Snover, post: 16195035, member: 67454"] Take any given volume of air he right ratio to burn. The more you compress it, the more it wants to burn. And not just from the heat of compression, the more tightly you pack the oxidizer and the fuel, the more likely it is going to burn. That being the case, why do boosted engines, in general, those burning gasoline or alcohol*, need a more powerful spark? It is true that they do need a more powerful spark, that is no misconception. Or else the airfuel mixture fails to burn. You hear a lot of incorrect things, like, "The boost blows the spark out." Nope. Completely wrong. *Hydrogen-burning does not count, in this example. Because Hydrogen is damn strange stuff. You don't need a spark to make Hydrogen burn, and it has the widest air-fuel ratio of any fuel, and it can either burn or detonate, under identical conditions. [/QUOTE]
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Pop quiz: Why do boosted engines need a more powerful spark?
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