Originally Posted by scoooby slayer

sorry that was a bad reply.

I myself used to not touch turbos due to the internet and reading myself they must all be balanced and its simply not true.

the new wheels and shafts are balanced so once installed in a core they are good to go.

there will no doubt be a tolerance and as the boost and flow goes up the shaft speed gets higher and eventually I think they may need a better balance.

abit like balanceing an engine is how I view it not essential, but as the tune increases and rpms increase it becomes more and more important to have a better tolerance of balance.

out of the 10 odd turbos ive built with new shafts and wheels and full service kit or just rebearinged and sealed non have failed yet and none were balanced. the first t6 i did had a little wheel wear where it touched the housing slightly and I built that must be 2 years ago and its still perfect to this day.