I could use a little help diagnosing a new noise that my 05 LGT manual just developed. The car is stock except for running 93 octane stage 1 Cobb map.
Under heavy acceleration and once the boost hits 10psi or higher I hear a noise similar to party noise makers that unrolls whe you blow on it. It sounds like its coming from the drivers side of the engine compartment, not the turbo side. Besides for the noise over 10psi the car is running just fine...no power loss, no rough idle, etc.
Possibly an intercooler gasket leak? I'm not sure what else on that side of the engine compartment would make that sound under boost. I recently had my clutch replaced which I think requires the removal of the IC so this is the first thing I thought of.
Thanks in advance for any help.