Possible turbo 318 build

A wery simple rule to size the compressor side on a turbo is:

inducer(mm) * inducer(mm) / 6.

57mm * 57mm / 6 = 540hp


and a wery easy way to get a cheap turbo, is to look at trucks! if you have a 5L petrol engine, you roughly need the turbo from a 10L diesel engine.

so by looking at a Scania 11L or 14L v8, you will find what you look for!
I'm sure you have alot of trucks over there that are out of business(?)!