no1kicker Posted September 17, 2003 Report Share Posted September 17, 2003 Can someone please explain why having no muffler on a car would hurt its fuel economy? Does it have to do with backpressure? Quote Link to comment Share on other sites More sharing options...
Robby1870 Posted September 17, 2003 Report Share Posted September 17, 2003 Yes it does, With no muffler or cat for that matter, too much of the mixture exits the combustion chamber before it is ignited causing a loss in MPG Robby Quote Link to comment Share on other sites More sharing options...
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