exaust louder with air conditioning? - Subaru WRX Forum
 
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post #1 of 3 Old 09-29-2010, 01:33 AM Thread Starter
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exaust louder with air conditioning?

its has been hot here in north cali, so i have been using my air conditioning a lot lately, but i noticed the other day that man my car sounds more beefy with it on. i don't have any real mods just a cat back "racing" exhaust by magnaflow w/no resonator. and i know this is a stupid question, but i kinda want to know why that is . and if i can get it like that all the time. i like to modify my cars but i am still doing a lot of research on this car so... we will see
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post #2 of 3 Old 09-29-2010, 01:44 AM
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It's just a resonant frequency... When the A/C clutch kicks the compressor on, it increases the load on the motor, and therefore the motor revs slightly higher at idle. There shouldn't be any difference when you're moving. My car is similar. When I start it in the morning, while it's idling just a little higher it's actually pretty obnoxious, but it's downright quiet once it's warmed up. If the revs are slightly lower or higher it will be quieter. Hope that helps.
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post #3 of 3 Old 09-30-2010, 01:15 AM Thread Starter
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yea i noticed that as well when the clutch for the compressor kicks in it does give some more revs , but i dunno maybe i just am crazy but it seems like there is some kinda of deeper tone when its on . oh well it doesnt matter thanks though
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