don't go to low as there crap off boost , i run 2. bar of boost from a T38 on my car with a comp of 8.2:1, kin awesome !!!

get good pistons, most good tuners don't go low comp anymore as its an old school way of reducing the risk of detonation. most good tuners have solved the problems with all the new technology we have today...

i know of a few cars that run big boost with higher / std comp now days..

unless you cant find a good tuner to set it up or you are going crazy with the boost, keep it std comp with good quality pistons