How often do have to "prime" you engine water pump? The system is pretty straight forward. Yes, it is more equipment and more complex than an air to air system, but typically it is worth the added equipment. As far someone making the comment that an air to air core is more efficient, they are dead wrong. The liquid to air cores that are typical to most systems have greater charge air side core surface area, and drastically reduced charge side core length. The air to air core needs to have the charge air travel in a rather diffused manner typically several times the distance of an equivalent liquid to air core. The more distance the air has to travel to pass through the core, the more pressure drop the charge will suffer on the cold side of the system. The liquid to air core pressure drop is in most cases measured by fractions of a psi, whereas the drop in an air to air core is typically measured in a few whole psi (Anywhere from 2-3.5 in many cases). This equates to a more efficient use of the pressure levels generated by a turbo at a given psi, and a quicker boost response due to the faster delivery of charge air on the intake side, and less resistance to flow on the hot pipe side. The issue of producing chage temps well enough below ambient has already been addressed, which short of paying to spray N2O is something the air to air will NEVER do. Aquamist and ghetto fab water injection systems will not produce the same results of a good liquid to air system. Both can get heat soaked, but the liquid to air system constantly works to aleviate that concern by its very nature; not something the air to air system does. Depending upon the volume of the system, and cooling core efficiency, there is no reason to stop to cool off, check fluid levels, or believe that the system will suffer heat soaking too dramatically. I use the added liquid weight in my system to counter balance the added weight of the turbo system. I have a pickup truck, so traction is a huge concern. I put my battery in the bed box, as well as the five gallon cell, pump, and the radiator dedicated to cooling the intercooler water is under the bed where the spare tire used to go. Also consider the added benefit of having much shorter, straigher piping on your system. I love liquid to air!! This one is my second street driven daily gring vehicle with a liquid to air system.

John