When at idle just letting the clutch out then it goes. When putting foot down and going through the gears knocking sound comes back at about 5k - 6k revs.
The car seems to hold back at this point
The car has done this since I got it in JAN this year. I would not have thought it was a big end bearing as I would have thought that these would die early.
New water pump, pullys, belts etc all done in MAY 2001.