I just light and fast pushes the gas pedal and engine revs just above 2000 rpm and rpm is falling (to about 1500-2000rpm) a loud, hash, metallic sound and fine but strong vibrations in passengersside turbo (I think it must come from the turbo).

Gott Greddy TT that i mount last summer on stock block. Now I have a built bloch and started engine 2 days ago.

Hasn't drive more than 30miles since rebuild (In max 20mph) to drive to the tuner to get a map so I can brake in engine on WG pressure.

There the bad sond first appeard, after 1 hour during tuning low rpm and no boost. It got worse and worse so vi aborted. Is it turbo failure?

 

hopefully whoever built your car took the precaution when building not to let the blades of the turbos touch the ground. could have bent one of the propeller blades.

 

it only makes a breif sound at a certain rpm not above and not under, can it do so w/ bend propeller?

 

it would be more likely to be the blade if its above a certain rpm. as you say if its not above or under are you sure its the turbo? it sounds more like knock now.

if its a blade then above xxxx rpm because the lack of balance at a higher rpm becomes more of a factor.

 

No, I'm not shure it's the turbo. The sound source is very difficuld to find. But it's in that area and when I press a tool on turbo I feel vibrations more there than any other place I've tested. The tool slides to side along with the sound and vibrations.
If it's not turbo what could it be?

 

Took down turbo yesterday. And yes it's turbo failure.
Bearings are worn out, way out. Why I yet don't know. Think oil supply is fine and blades at least looks good to the eye. More investigations to follow...