Hello all!
Does anyone recognize this noise? It is coming from somewhere around the crankshaft end or oil pump. I have been trying to find the source for some months now. New vibration damper, restored belt tensioner ball bearings, rebuilt supercharger, new bypass valve, no exhaust or inlet leaks.
The sound appears after 60 seconds in the movie. It is only heard during heavy acceleration with warm engine @ 3000 rpm upwards.

My latest idea is that the torsional vibration in the crankshaft could cause the inner rotor in the oil pump to vibrate on the shaft...

Grateful for any input. /Magnus

http://www.youtube.com/watch?v=ZT0m-72vK1o