"Whatever we came out with had to be a durable package - we set our own standards and said we weren't going to compromise any of Ford's durability, so the turbo engine did all the same testing that the naturally aspirated engine did. "Of course, there's a lot of dynamometer durability testing - like 300 hours going between maximum torque and maximum power - and the engine still has to be completely serviceable and making reasonable power by the end. http://www.autospeed.com/cms/A_1886/article.html