I think that it happen over a month ago, i heard it while i was in first gear low throttle around 3k, a little weird noise & i do drive my car everyday, but i think something went bad with the oil pump, I am not sure about that though,
ok... on saturday i when to the track & ran beautiful, but everytime i rev it to 3k to launch i heard it again, i ran a few more times & after a burnout it got real loud ( the thumping) i got pissed & race some awd audi, I treed him, I ran a 13:63 @ 103 mph with rod knock, but now am looking for forged internals.