I'm no mechanic but I believe a foreign body went through the block. The bores where fairly haggard and the tops of the pistons had a fair amount of pinging damage (as shown in the pics). The exhaust wheel on the rear turbo was also non existent (as shown in the pics, maybe a big enough brave enough piece of piston took it on?), although the front turbo wheel spins freely and feels to have no resistance or shaft play. The valves seem to have escaped damage and still seat nicely, as the crank and cam shafts also only seem to have normal wear. This is an uneducated theory but I believe the engine was just run too hard with too much boost on standard pistons for too long before I bought it and the rear turbo exhaust wheel finally gave up. I was able to start the car after it died (while driving sedately believe it or not) but it just sounded horrible so I killed it and eventually pulled it apart. It also had no weird sounds or knocks before it died. I believe it was just run too hard on standard pistons because it came with dyno sheets showing over 330rwkw when I bought it and I did not have it tuned and only had it run 272rwkw on 14psi when I had it tested personally. So I'm assuming it was detuned and sold off to me... Please note this is my own opinion and I have very little engine knowledge and this theory should not be taken as fact. I'd appreciate no flaming of my own opinion if this sounds completely retarded , I'm just being as honest as I can.
I have cleaned the crank and cam shafts up a little bit to shown wear and confirm there is no rust as the engine has been apart for over 1year now (I've left everything covered in oil and oiled where needed and wrapped in rags as I originally intended to have this rebuilt myself).
I did take this car to one test n tune drag meet in its short running life with me, it can be viewed running on this vid at 48sec and 1min25sec (I lost the drag at 1min 25sec as I beat my estimated time ran 12.2 sec best that night).
http://www.youtube.c.../39/lxKHVVZG7y0