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07-20-2025, 01:36 PM
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#1 |
    
Drives: 2015 1LE Join Date: Oct 2015
Location: Cleveland, OH
Posts: 1,497
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Need Help with WHOOO sound
I have a 2015 cammed with headers and six speed manual. I am starting to get a weird WHOOO sound when its at idle. Sounds like its coming from center of the car around transmission area maybe. You have to put your ear at the firewall to hear it with hood opened and you can hear it sitting in car at idle. If you stick your head in the back seat its hard to hear. When you increase rpm it goes away. Pushing in clutch pedal does nothing to change the sound. Does not make it when driving as far as I can tell. I can't figure out what the hell is causing it, not sure if its something to do with clutch or tranmission bearings. Has anybody ever experienced this or know what the hell is causing it?
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2015 1LE, TSP 225/236 113+3, VMAX Throttle Body, CAI with race scoop, GPI Ported Intake, Land Speed Stage 2 Heads, 1-7/8 headers, NPP exhaust, 25% Fluidampr, LT1-S Monster Clutch, 485 RWHP & 444 TQ
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07-20-2025, 06:22 PM
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#2 |
 
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Usually when I hear a whooo sound,it's going whoo, whoo, whoo and he makes me pull over. Sorry, just trying to lighten the mood. I would've mentioned clutch, but it sounds like you tried it.
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07-20-2025, 06:59 PM
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#3 |
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Drives: 2015 1LE Join Date: Oct 2015
Location: Cleveland, OH
Posts: 1,497
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I know, the whoo is a little weird but that is what it sounds like.
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2015 1LE, TSP 225/236 113+3, VMAX Throttle Body, CAI with race scoop, GPI Ported Intake, Land Speed Stage 2 Heads, 1-7/8 headers, NPP exhaust, 25% Fluidampr, LT1-S Monster Clutch, 485 RWHP & 444 TQ
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07-20-2025, 07:01 PM
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#4 |
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Drives: 2015 1LE Join Date: Oct 2015
Location: Cleveland, OH
Posts: 1,497
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its not just one whoo, its a consisten one
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2015 1LE, TSP 225/236 113+3, VMAX Throttle Body, CAI with race scoop, GPI Ported Intake, Land Speed Stage 2 Heads, 1-7/8 headers, NPP exhaust, 25% Fluidampr, LT1-S Monster Clutch, 485 RWHP & 444 TQ
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07-20-2025, 07:03 PM
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#5 |
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Does it do it when the engine is cold compared to fully warmed up?
Have you seen if it's the HVAC fan for the cabin? Mine makes a quiet noise.
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07-20-2025, 07:39 PM
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#6 |
       
Drives: 2011 SS-RS Join Date: May 2011
Location: FLORIDA
Posts: 13,340
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Another thing to check is your air intake system, or intake manifold for a vacuum leak. My Camaro never did this sound, but my Mustang did when I had a leak in the back of it. It was worse when it was cold, and when it warmed up it lightened up a bit, but was still there. Good luck.
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TSP STAGE 3 CAM,231/246 @112 LSA 614/641 LIFT, CIRCLE D 5C-4200-4500 CONVERTER,LOD INTAKE.CORSA EXHAUST. DSS 1 PC DS. PEGASUS SOLID CRADLE MOUNTS. 486RWHP/475RWTQ.LOTS MORE.
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07-20-2025, 08:11 PM
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#7 |
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Drives: 2015 1LE Join Date: Oct 2015
Location: Cleveland, OH
Posts: 1,497
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I am starting to think it is just exhaust drone. I have the npp disconnected but I looked inside the mufflers and I can see the packing inside the muffler on the quiet side. I think the muffler is screwed up inside and its starting do just drone at idle.
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2015 1LE, TSP 225/236 113+3, VMAX Throttle Body, CAI with race scoop, GPI Ported Intake, Land Speed Stage 2 Heads, 1-7/8 headers, NPP exhaust, 25% Fluidampr, LT1-S Monster Clutch, 485 RWHP & 444 TQ
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07-22-2025, 07:05 AM
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#8 |
 
Drives: 2013 Chevy Camaro 1LT Join Date: May 2022
Location: Lacey, Wa
Posts: 149
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Could there be a hole in the pipes, or looseconnector showing air leak? That could account for the whoo sound, kinda like a whistle.
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