It will take a lot of searching to find the various dynos. IMO, the TDI turbos are so small in general that you won't notice much difference. I have not personally put one on my car but to the best of my understanding, if you have never driven a TDI before, you would never know the difference. +1 size larger turbos with supporting mods can even spool up faster than a stock car. A VNT 17 would be the basic economical choice here.
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