ProCharger supercharger systems are absolutely the most powerful and reliable supercharger systems available for your vehicle. For street use or at the track, Procharger supercharger systems will deliver absolutely the largest increase in horsepower and torque available from any supercharger system. In fact for applications running pump gas, ProCharger systems can often deliver approximately twice the performance gain of our nearest competitor. And thanks to the extremely low engine intake temperatures provided by ProCharger technology, ProCharger systems also provide much better engine longevity by protecting your motor from detonation. ProCharger systems are designed with a fundamental understanding of the physics behind supercharging, and are engineered to the highest quality standards. It is this approach that allows ATI to offer exclusive features which improve both the performance and reliability of ProCharger systems relative to other products. For example, it is simply an undisputed fact that lowering the engine intake temperature will substantially improve both performance and engine longevity, and ATI provides the coolest intake charge air temperature in the industry by a wide margin. Similarly, by using CNC machining and nearly indestructable 7075 T-6 aircraft aluminum to produce the largest and strongest impellers in the industry, ATI is able to again improve both performance and reliability. The ProCharger is the only supercharger to incorporate a billet impeller in production models, and is another example of ATI's technical leadership. This quality and durability in turn allows ProCharger customers to have further peace of mind knowing that ProCharger superchargers are also backed by the best warranty in the industry. In addition to absolutely unmatched performance and reliability, ProCharger supercharger systems also offer the following benefits to customers: Quality ProCharger supercharger systems are produced from the finest materials available. All castings are poured from "virgin" 356 aluminum alloy and heat-treated to a T-6 hardness before CNC machining. ATI's exclusive billet impellers are machined from 7075 T-6 aircraft aluminum, while the super precision bearings used in all ProCharger models are made in the USA, and are of a consistently higher quality and speed/load rating than those used by any of our competitors. In fact, ProCharger superchargers are so reliable that they are used as standard equipment by many leading boat manufacturers in the extremely demanding marine environment. ATI is the only centrifugal supercharger which can be ordered as OEM equipment from any performance boat manufacturer. Complete Systems All fuel-injected automotive and truck ProCharger Systems are 100% complete, with all the components needed for an attractive, OEM-quality installation. All hardware is of the highest quality, and all fuel-injected systems even include a high-flow external fuel pump as standard equipment. Carbureted systems are complete with the exception of the carburetor and fuel system, which depend upon an individual's specific motor and performance needs. Warranty ProCharger superchargers are absolutely the most reliable (have the lowest failure rate) in the industry, and are backed by the industry's best warranty coverage. It is not uncommon to find ProCharger systems warrantied for 1 year at power levels which our competitors will not even warranty for 1 day.

Installation Most Intercooled ProCharger systems can be installed in 8-10 hours with simple hand tools. Carbureted systems can generally be installed in 4-6 hours. All ProCharger systems contain extremely thorough installation instructions with plenty of photos, illustrations and diagrams to help ensure a successful installation. Emissions Unless otherwise noted, all ProCharger systems for fuel-injected applications meet both EPA and CARB emmissions requirements and are classified as 50 state legal. Maintenance With ProCharger's industrial lubrication system, ProCharger supercharger systems are basically maintenance free. All we ask is that you fill up with at least 91 octane fuel, and change your engine oil every 3,000 miles. Intercooled ProCharger systems also feature none of the maintenance of other supercharger systems, as air-to-air intercoolers are 100% reliable, and mean that you don't have to worry about ignition retard, auxiliary fuel or water injection systems which can fail.

Benefits of Intercooling



• Greatly Reduced Intake Temperature
  A 70 - 200° drop in air temperature (dependent upon application) results in a more dense, powerful fuel/air charge, greatly reduces exposure to detonation, and virtually eliminates the "power fade" felt in back-to-back runs and extended pulls without intercooling
  
  

• Full Timing
  This reduction in temperature allows you to run full timing, and avoids the substantial horsepower loss inflicted by ignition retard systems or timing chips
  
  

• More Low-End Boost and Horsepower
  The intercooler also acts as a passive wastegate, flattening the boost curve at higher rpm's and allowing more boost to be dialed in at lower rpm's
  
  

• An Expanded Power Band
  Full timing and forced induction keep the engine pulling hard to the redline
  
  

• More Boost
  Not only will you experience the above benefits at any boost level, you can also safely run substantially more boost when intercooled!

Clearly, the only type of performance that matters is reliable performance, and detonation is the single biggest threat to engine reliability. The boost range for reliable performance, without detonation, can be determined by looking at the type of supercharger technology being considered, and the compression ratio of the motor. With a lower compression ratio, an engine can safely handle more boost, everything else being equal. Similarly, if the temperature of the compressed air is lower, an engine will have a much higher detonation threshold (the point at which fuel ignites without a spark), and will be able to safely handle more boost. The chart below helps to illustrate how the overall efficiency of the entire supercharger system can be increased by both leading edge supercharger efficiency and the use of intercooling. Simply locate an engine's compression ratio at the bottom of the chart and trace upwards to determine the maximum reliable boost level. The amount of heat produced (adiabatic effiency) by each supercharging technology is what determines the boost limitation. While gear-driven centrifugal is clearly the superior supercharger technology, it is also clear that the biggest benefit comes from intercooling. These calculations assume moderate timing, 92 octane pump gas, and a good supply of fuel to the cylinders. As mentioned previously, detonation is the single biggest threat to engine reliability. It is heat and detonation that cause blown head gaskets and burned pistons, not boost. Achieving maximum performance from a given engine while avoiding detonation requires the right combination of intake air temperature, timing and fuel quality. For example, without intercooling a stock 5.0 with 9.5:1 compression ratio can only hold 5-6 psi of boost before detonation becomes a problem. The only way to safely run more than 6 psi of boost and still make a meaningful increase in power without an intercooler is by using racing fuel to avoid detonation. Many companies also employ "band-aids" such as ignition retard and larger injectors to run 8-9 psi on pump gas, but the resulting increase in performance is only marginal (since both of these band-aids suboptimize) and detonation is frequently still a problem.

We've all heard of this, but what is it? Detonation, or engine knock, occurs simply when fuel pre-ignites before the piston reaches scheduled spark ignition. This means that a powerful explosion is trying to expand a cylinder chamber that is shrinking in size, attempting to reverse the direction of the piston and the engine. When detonation occurs, the internal pneumatic forces can actually exceed 10x the normal forces acting upon a properly operating high performance engine. Detonation is generally caused by excessive heat, excessive cylinder pressure, improper ignition timing, inadequate fuel octane or a combination of these. Of the previous, excessive heat is usually the culprit. As an engine is modified to generate more power, additional heat is produced. Today's pump gas will only tolerate a finite amount of heat before it pre-ignites and causes detonation. Although forced induction engines usually produce far less heat than comparable naturally aspirated high compression engines, the cylinder temperatures in intercooled engines are radically cooler yet. It is rarely boost that causes detonation, just unnecessary heat. An intercooler is such a natural solution for forced induction, that in almost every OEM application, intercooling is part of the package.

Accessible Technologies manufactures both air-to-air and air-to-water intercooler systems, and the guidelines for their usage are fairly straightforward.

For automotive street applications, air-to-air technology is easy to install, highly effective, extremely reliable since it has no moving parts, and requires no maintenance. Air-to-water intercooler systems, on the other hand, are much more difficult to install as they contain an intercooler, a separate radiator to cool the water, a water tank, and a pump. But probably the biggest drawback to air-to-water on the street is that this technology requires the addition of ice to match the efficiency of air-to-air technology. Additionally, the requirement of ice and the possibility of pump failure or leakage means that air-to-water is also inherently less reliable.

For race-only applications, air-to-water works well since the need to add ice at the track prior to each run is not a big drawback. The other issues are the same as listed above for street applications, and efficiency will be comparable with the use of ice.

For marine applications, air-to-water is the preferred technology, for three primary reasons. First, the installation of a pump and radiator are no longer required (the lake or ocean is the radiator, and boats already have a water pickup/pump). Second, ice is not required, given the availability of massive amounts of cool lake or ocean water into which heat can be transferred. And finally, since boat engines are typically situated in the rear rather than in the front (like most automobiles), it would be very difficult to find adequate airflow for an air-to-air intercooler in the back of the boat.

All non-intercooled superchargers operate with an intake manifold temperature in the general range of 90 - 190° above ambient (outside air) temperature at 9 psi. At the same boost level, an Intercooled ProCharger operates at only 25° above ambient! This tremendous advantage from cooler air is just like the difference between driving your car on a cold winter's day vs the blistering heat of summer! Thats a real advantage that yields real performance. It helps to understand that no supercharger alone will ever begin to match the system efficiency of an intercooled supercharger system. This is simply because compressing air creates heat, as dictated by the laws of physics (Boyle's Gas Law). Even in the case of "perfect compression" (100% adiabatic efficiency, which is physically impossible without an intercooler - see chart), air temperature would increase by more than 75° at only 9 psi, while the lower (40-80%) efficiencies of all non-intercooled superchargers produce substantially higher temperatures. Intercooled ProCharger systems are the fundamental, OEM solution - because not only is less heat created when the air is compressed, the majority of this heat is actually removed through intercooling.

The bottom line is that intercooled boost is substantially more powerful and safe for your engine than hot, non-intercooled boost. Now that technology has developed to the point that gear-driven superchargers are powerful enough to reliably blow through an intercooler, it simply doesn't make sense not to intercool, especially for fuel injected applications running pump gas. In fact, for high compression engines or continuous duty applications, such as marine or towing, intercooling is absolutely essential for reliability.

In basic terms, compressing air creates heat, while intercooling removes heat. The illustration below may help to further explain the tremendous impact of intercooling upon supercharger system efficiency and engine intake temperatures:

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