Overrun – When Excess Fuel Becomes a Symphony of Flames and banging from your Exhaust

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Credit: Lemans_15

What’s overrun? A standard sight on most racing vehicles, and even some excessive efficiency street vehicles.

That is recognized once you carry off the throttle at excessive rpm, and the interval the place the engine slows down, throughout which any unburnt gasoline will get ignited by the remainder of the exhaust system, while the throttle remains to be closed.

Typically triggered when operating a really aggressive gasoline map. However this similar setup could be a double edged sword. Over fuelling could be a technique used to chill down cylinder temperatures, however an excessive amount of can destroy the CAT.

It's extremely seemingly this Porsche 934 doesn't have a CAT to fret about, as an alternative it produces a beautiful sight that even NASA would in all probability be pleased with.