Hi all, a good friend has a rather peculiar sound coming form his freshly built engine. The sounds seems to occur at around 3,000 to 3,300 rpm. He is at his wits end with trying to diagnose and fix the noise. Given this, the owner has gone to extraordinary measures to try and identify the issue, all with no avail. As he has exhausted every idea possible, he requested that I create this thread in the hope that other may assist in its identification and rectification. History: The car has been