How is it that two cars with similar engines, let’s say turbocharged 2.0l straight 4cyl engines, sound so different?
Not including exhaust systems. Let’s hold that constant at a straight pipe.
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because of different loads placed on the engine and the exhaust system is different.
All things being equal (the engine, tune, and exhaust system) the sound coming from the exhaust is going to be affected by how much exhaust gas and how fast the gasses get pushed through the system. A truck with no load on it is going to sound different than one that’s maxed out its payload capacity. An engine with a light load will be able to go from a low RPM to a high RPM much quicker.
The other factor is the exhaust systems are different even if they’re both straight pipes because pipe length and diameter has an effect. A larger pipe diameter will mean the gases are moving at a slower speed and the length if the pipes has an effect on the resonant frequency. If those tings are the same, then they will sound the same given the engines are tuned the same.
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