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10

A muffler is a harmonically tuned chamber that is designed to reduce the noise created by the combustion process. Mufflers are usually designed with specific sound frequencies in mind. When a vehicle is being designed, the engineers will measure the sound frequencies emitted by the engine, and using harmonic tuning, create mufflers that specifically cancel ...


2

Because it's not painted – it gets too hot for paint. Other surfaces that can rust are usually covered in paint, chrome or other coating (even the car's underside) to seal the iron from the corrosive environment of this planet – rust will also develop if you scratch the paint: That said, stainless steel doesn't need paint. The DeLorean DMC-12 had ...


0

Because, as has been pointed out, the infernal combustion engine has dangerous byproducts - heat and poisonous gases, as well as noise - which need to be carried away from the persons using the vehicle. Society made a bad choice a century ago, and we live with the consequences to this day. Get an electric car and you won't have to replace your exhaust/...


1

Take that airplane with the short, up-front, direct exhaust pipes. Start it up in your driveway early on a Saturday morning. See how popular you are with your neighbors.


7

Adding to the excellent answers already given. An important point to note is that we need to have a catalytic converter somewhere in the exhaust a short exhaust will not have room to fit it. Then there are a host of other things car manufacturers determine while designing an exhaust system. For an engine to have optimum efficiency, the intake , ...


9

The exhaust also creates a pressure differential, which can help scavenge exhaust gases from the chamber. So a properly tuned exhaust will therefore increase the fuel efficiency of the engine. Whilst an engine without an exhaust would make more power, it would also consume more fuel.


45

Well, we can have a pipe going out the front of a car as in this design here: or its heavier predecessor: Arguably, the aerodynamic properties are not optimal in both, but here is a similar approach where aerodynamics have been considered for sure: other designs (like trucks) do account for aerodynamics by putting the exhaust tubing behind the relevant ...


52

Safety, comfort, noise and space are the things that come to mind. Safety Exhaust gasses are hot as hell. Hot enough that we put heat shields all over the exhaust line. In engines, we are actively trying to remove heat. Adding more from the exhaust goes completely against that and would increase overheating. Also, would you want a hot exhaust pipe near ...


14

Several things; Exhaust coming out the front is dangerous. If the fumes are ingested into the cab the driver may be harmed. Normally a car is driven forward. If the exhaust is coming out the back this gives the least chance of the fumes making it inside the cab. Mufflers are large components. Often there is not enough room inside the engine compartment to ...


4

It depends on the exhaust system. If it is a road bike with an exhaust system designed for the road, you need to keep the silencer/muffler/mute on it for optimum performance. Only a full race system, designed to run without a silencer (pretty rare these days with all the noise restrictions even on races) might suffer by having a silencer attached, but that ...


2

Oil consumption in the LM7 engines is pretty common. The L33 in my '06 Silverado is around the same amount, maybe a little less. What you are talking about sounds more like a stuck/leaky injector. Oil smoke will usually last longer than 10 seconds, if that were the issue. And it would be distinctly blue, not black/dark. The way you could tell if this was ...


1

Get rid of that flapper air cleaner system, unless you live somewhere with a winter that insists you have it. Plug the manifold hole. OR... Get a pro to braze the riser tube, most likely done while still on the truck. OR... Get a calm and mellow person to carefully drill/tap the exhaust manifold, to install a compression to male NPT adapter fitting with a ...



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