[RoboTuner]

It's almost loud enough to be rod knock, take it from someone who just had to build their motor (long story). You will know what a WELL spun rod bearing knock sounds like when it happens (you WILL hear it at idle, at 1500rpm it will make you cry..and that's where I stopped). Partially spun rod bearings may knock still, but not usually at idle and more so in the powerband. If you noticed the knock is loudest when the turbo makes full efficiency (3k-4500rpm) so possible causes are rod knock due to high pressures above idle, or valvetrain rattle (rpm dependent sometimes).

Seriously stop driving it and get it fixed ASAP!!!


P.S. I just dropped 10k on my bugeye rebuild. Granted I did a 2.2l stroker build (almost same price as factory replacement), needed ned heads (GSC), ALL vac lines, rear 02, 5MT harness (some owners never cease to amaze me), and ACC belt tension pulley.