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Discussion Starter #1
a friend of a friend has a silverado, and has recently taken out the 'silencer' in his exhaust and just resodded the pipesd back together and that all he's done to it. grnated the v8 he has prolly makes it sound so deep but he said he's seen s10s with the same work and they sound loud as hell but not like a riceburner. they sound good. only question i have is if that part really exists would the truck still pass emissions and or kill my gas mileage? any feedback guys?


mike
 

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a muffler, in effect, is the silencer itself. it disperses the gas by a series of baffles and walls, allowing the hot gas to expand and cool before exiting the vehicle at a lower pressure and temperature. What it sounds like he did is cut open the muffler, gut it, and solder it back together so it still looks like he has a muffler. This would, of course, make the truck louder.

Regarding your question about gas mileage, it can go one of a few ways.
1) louder, so you hit the gas harder, gas mileage suffers
2) "no muffler" is less restrictive, gas mileage improves
3) lack of back pressure hurts engine performance
4) absolutely nothing

I have no idea about passing emissions.
 
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