I am expecting a Swiftech Quiet Power tomorrow and have noticed something weird. The flow that is set up is pump>block>rad. I thought it should go pump>rad>block. How much of a difference in Celcious will the different paths be? Also this thing ships with 75% water and 25% coolant. I am the first to acknowlage that coolant sucks at heat transfer and is too viscious, I don't use any in my car! How much will this affect temps? Should I empty the system and just use water and water wetter? Thanks.