When on Neural gear, If ram RPM to 3000, nothing happen,

When engage gear, at RPM 2000, there is some little noise.
When RPM 3500 and boost around 0.3bar, there is loud noise.
Could it be from turbo? It sound like rubbing metal .....

 

clanbuster, this is why I am so hesitant to pull the trigger on a TC or SC... Once something happens inside the engine I am absolutely clueless... I'm afraid the dayum thing would be broken down more than it is driven....
--I hope it's something minor tho with your engine noise!--and as you can see, I'm not much help for your question..