I have a top mounted twin system on my 2002 corvette. I bought "new" turbos from a guy with a shop that does hot rod work and decided to go a different route for his engine. My question is: Is it possible to run any quantitative or qualitative tests on the turbochargers before I go through all the trouble of retuning my car and installing them? Is there a machine that can spin them or something to make sure they dont ruin my engine? They are brand new but I am unsure of the brand so I dont know if I can trust them.  

Thank you

chas