I wouldn't call the leaking seal issue a “failure”, as much as I would an inconvenience. I've never once heard of a seal going bad and taking the rest of the blower with it. The problem is more of a slight annoyance because of the mess that the oil that "seeps" past the seal itself makes. Either way, they don’t go all at once either….seals wear out, bearings wear out and it’s just one of the little hiccups of owning a non-stock Mustang. Regardless, ATI has had no troubles addressing this issue for owners in the past, much like Vortech, Kenne Bell or any other company would not have with regards to issues dealing with any deficiencies of their blower.
The gearing in the P1SC is quite good for a street car. It allows for better low end horsepower and torque, than the traditional Centrifugal, since the 4.10 step up ratio allows it to spin the impeller unit that much quicker and easier. Much like when you swap out to a set of higher (numerically) gears in the rear end of your Mustang. The engine is able to easier pull the shorter gear and make better used of the power available by putting it to the pavement. It may make a little more heat that your average Centrifugal, but it still doesn’t make anywhere near the heat that your average Eaton or Twin Screw does and as such still allows for a nice hard pull on the top end. It's a nice compromise between the two and ideal for a car looking to make moderate/semi-serious power levels.
The oil in the self contained unit does get a little warmer and it would stand to reason, but not to the point where it's seriously affecting performance. All Positive Displacement blowers are self contained as well, but you never hear of problems with excessive heat because of it. The Procharger units implement a completely fool proof "misting" system that both lowers oil temperatures and always assures adequate oiling to the gear unit.
The additional temperatures that are seen due to the higher gear speed and non-fresh oil feed are minimal and remain essentially within the gear casing itself. The intake and discharge points themselves are isolated from this area and still allow for very manageable ACT's. Regardless....any additional heat that the self contained unit might be making, is pretty quickly nullified...and then some by the standard intercooler.
The Procharger owners I've seen on this board are very happy with their units and always dyno a fair bit higher than the other comparable centrifugal set ups. Even higher than some of the Twin Screw units in a lot of the applications. The power is good, the price is right….I’d even consider one for my next 4V project.
