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11-28-2012, 09:20 PM | #1 |
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Hissing sound with akra evo
Hey guys,
I tried searching but only found one other thread mentioning this issue but no real answer. I just had my akra slipon upgraded to the full evo with the akra front pipes, and have noticed this Hissing sound coming from the rear around 3-4krpm. Has anyone else with this exhaust noticed this distinct sound or is this an abnormal sound ie: leak?
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2011.75 E92 MW/BB extended,ZCP,ZP2,ZCV, IPOD,BMW APPS, Heatedseats,6MT, Edition Black Chrome Grills & Side Gills, CF splitters, CF performance spoiler, CF mirror caps, Turner black anodized pedals, Akropovic Evolution exhaust w/CF tips, Still Undecided on tune, AFE Pro5r, AFE intake scoops, LUX H8
2009 E92 JB/Black 335 xdrive (retired) |
11-29-2012, 09:04 AM | #2 |
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I haven't heard anything like that. May wanna crawl under and check all your clamps and connections. I'm betting any leaking might be coming from the crossover pipe that doesn't use a clamp.
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11-29-2012, 11:10 AM | #3 | |
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If the car is parked and I rev the engine high the sound does not happen. A question for anyone!. If you were to have an exhaust leak would it usally be heard through all RPM ranges and at all speeds? Iam assuming that it would be heard if reving the engine while parked and not just while driving?
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2011.75 E92 MW/BB extended,ZCP,ZP2,ZCV, IPOD,BMW APPS, Heatedseats,6MT, Edition Black Chrome Grills & Side Gills, CF splitters, CF performance spoiler, CF mirror caps, Turner black anodized pedals, Akropovic Evolution exhaust w/CF tips, Still Undecided on tune, AFE Pro5r, AFE intake scoops, LUX H8
2009 E92 JB/Black 335 xdrive (retired) Last edited by HeartMD; 11-29-2012 at 11:25 AM.. |
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11-29-2012, 12:03 PM | #4 | |
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Maybe you can record a sound clip or video? My car w/ full Akra doesn't make any hissing sounds. Just roaring on a rampage sounds
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11-29-2012, 12:29 PM | #5 | |
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Do you have a filter on your car. Im starting to think that maybe this is intake noise that has now been enhanced by the front pipes.
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2011.75 E92 MW/BB extended,ZCP,ZP2,ZCV, IPOD,BMW APPS, Heatedseats,6MT, Edition Black Chrome Grills & Side Gills, CF splitters, CF performance spoiler, CF mirror caps, Turner black anodized pedals, Akropovic Evolution exhaust w/CF tips, Still Undecided on tune, AFE Pro5r, AFE intake scoops, LUX H8
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11-29-2012, 01:53 PM | #6 |
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I just went from Akra rear section to full evo and noticed that you hear much more intake sound that can sound like a loud hiss when you first hear it. Much freer "breathing" setup that seems to amplify the intake noise. I checked my clamps again after a couple of weeks to make sure everything was tight and found no issues.
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