General Iv got a weird problem

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General Iv got a weird problem

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Mar 25, 2016
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Hi all hope you are all well.
I'm a bit baffled,here goes?
While driving the car it pulls hard with no loss of power but when im higher up the rev range I hear what sounds like a metalic rasp vibration coming from high up behind the centre of the dashboard.
Like I said the car pulls great,no flat spots,no smoke.everything is working as it should apart from the noise.
Any help would be great
 
If I feather in the accelerator it doesn't make the sound,it only does it when foot hard to the floor,it makes the sound abit in 1st more in 2nd.
It's like when the engine gets to a certain tone it does it.
The noise I get is from high up behind the centre of the dashboard
The noise starts for example if I set off from traffic lights slowly then foot to floor,the noise starts higher up the rev range say after 3000rpm, then change gear into second with foot to floor it pulls like it should with no noise but again after around 3000rpm the noise comes back.
I would say its boost related,
If I feather in the power high up the rev range I get no noise it only happens when I hard accelerate
 
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