BMW Repair: Engine Failure, head gasket, puff of smoke

Question
well i dont really have a bmw but its something with the motor of my car so im pretty sure its all the same. well i have recently installed a turbo kit. after installing it i tried to push it. open throttle. once the turbo reached full boost at about 3200 rpms the car looses rpms. i was told a big white puff of smoke came out. i know it is most likley running lean. we un plugged the injectors and did not notice a significant change in performance. so im pretty sure its the extra injectors that came with the kit are not firing. i was just wondering if there also coule be any other underlying problems. thanks alot.
-ryan

Answer
Not knowing what type of car it is makes this hard.The white smoke coming out of the exhaust maybe a problem with the head gasket, as that is what happens when coolant enters the system. I need to know the type of vehicle it is to help you any further.