Originally Posted by smitsturbo
i mean like some people on here just buy a turbo off the shelf or ebay when others get them specced propperly to there engine spec?
"specced properly" turbos are almost always off the shelf ones (even if they told otherwise), just the most seemingly suited to the engine and what they want from it.
and you can do as many calculations as u like, a lot of it is down to experience/knowlege rather than anything you can work out in theory.
needs to be specced with the engine and all other components though to be totally suited.