Odd engine noise after rebuild

[zeile]

so prestory

i had an sr that somthing small got into CYL #2 and beat alota stuff up so i decided to do a full rebuild

bored the block decked it and the head new exhaust guides crank polished

new cams pistons rods bearings

put it back togeather got it it the car and it started first crank but has this odd intermitant "twangingish" sound doesnt sound like a KNOCK or a TICK but a twang. i think somthing may have gotten into the turbo from the damage in CYL#2 like a small peice metal

heres the video of the first start up

240 rebuild sound - YouTube (http://youtu.be/RcD5lLckXpk)

what do you think the noise is?

heres some pics of the damage before i fixed it
http://i989.photobucket.com/albums/af12/glevita/IMG_0253.jpg

http://i989.photobucket.com/albums/af12/glevita/IMG_0251.jpg

[zeile]

found the problem. there were some bebe sizes peices of my head in the turbo :/ exhaust turbo wheel is jacked up, taking it to the turbo shop in our area on monday. will post pics soon