I have an S5 turbo convertible and just got it all together. The JDM engine came with a turbo that has a lot of shaft wobble so i picked up another S5 in good shape. Now I want to tweak it for another few pounds of boost. I have an upgraded ECU etc.
I looked for this thread everywhere

 

You can clip the wings which will reduce backpressure on it... or do you want another turbo compressor fin itself for it