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The Terminator
Exhaust
Bassani X and Catback users...What RPM/MPH does the drone start?
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<blockquote data-quote="Cobra'03" data-source="post: 158412" data-attributes="member: 3013"><p>There seems to be a bit of confusion on this topic - the "drone" is a resonance characteristic of the engine. It is not produced by the aftermarket exhausts, just not muffled by them. That is why every aftermarket exhaust with good flow (read minimum muffling) has the resonance heard at around 2100 rpm. </p><p></p><p>OEM system can be tuned to attenutate the resonance. So could an electronic phase inversion system, which you will see in the future. In that system, a sensor reads the waveform of the frequency or frequencies to be attenuated, and inverts the phase of the waveform via a transducer producing a signal of equal amplitude. This creates a waveform trough. By physical laws, a crest and a trough will essentially null, producing no resonance, ergo, no "drone".</p><p></p><p>MPH? Depends on what gear you are in.</p></blockquote><p></p>
[QUOTE="Cobra'03, post: 158412, member: 3013"] There seems to be a bit of confusion on this topic - the "drone" is a resonance characteristic of the engine. It is not produced by the aftermarket exhausts, just not muffled by them. That is why every aftermarket exhaust with good flow (read minimum muffling) has the resonance heard at around 2100 rpm. OEM system can be tuned to attenutate the resonance. So could an electronic phase inversion system, which you will see in the future. In that system, a sensor reads the waveform of the frequency or frequencies to be attenuated, and inverts the phase of the waveform via a transducer producing a signal of equal amplitude. This creates a waveform trough. By physical laws, a crest and a trough will essentially null, producing no resonance, ergo, no "drone". MPH? Depends on what gear you are in. [/QUOTE]
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Exhaust
Bassani X and Catback users...What RPM/MPH does the drone start?
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