Possible turbo upgrade... what if?

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Has any body tried using the compressor housing and wheel from a 1.8T
(K03) turbo to a 1.9 TDI (K03) turbo. Or is that just asking for trouble. :roll:

Everything seems to bolt up. I swaped the whole compressor side, backing plate with thrust bearing, wheel and nut plus the compressor housing. Looks like it might be an advantage over the other.  :idea:

I know some one has tried before on here or maybe not.

Just bored on a Saturday...and playing around with spare toys.