If you've been in the truck scene long enough, it's of no surprise that the popularity of SUV's has only grown stronger. Late-model SUVs are not only safer to drive than their predecessors, but many can pack a serious punch in stock trim right from the factory. That said, the affinity towards these people haulers has continued to grow. Whether it's running family or friends around town or pulling the boat to the lake on weekends, SUVs have been an ideal way of getting all the goods where they need to go.
When our friends at ProCharger threw out an opportunity to install one of their complete supercharger systems, we knew exactly which truck we were going to leverage. If you're not familiar with the Jeep Grand Cherokee SRT
platform, it's unibody is stuffed with the 475 hp and 470 lb-ft 6.4L Hemi with eight-speed automatic. What's more, all-wheel drive and even a launch control feature makes this the perfect platform for adding substantial power for an ideal boulevard bruiser or weekend warrior. With a hefty 5,100-lb curb weight, it's proof these things are built like tanks.
| Grand Cherokee SRT Gets ProCharger P 1SC 1 00
Naturally, ProCharger couldn't have made the install any easier. Our P-1SC-1 supercharger kit came with every single component including the supercharger, three-core intercooler, hard and soft piping, fittings, fuel injectors, wiring harnesses, and of course, all of the necessary hardware for the correct install. Before we could dig into the install on the ProCharger P-1SC-1 system, we headed on over to our local dynamometer for baseline testing. With only a Magnaflow cat-back exhaust system installed, we're happy to report the Jeep
SRT laid down 430 rear-wheel horsepower and 450 lb-ft (note: all-wheel drive was disconnected for rear-wheel drive only baseline testing).
While we opted for a complete install at a local, high-performance automotive shop, we can assure you this install can be handled in your own garage in one to two days. What's more, fit and finish was second-to-none, drivability remained intact, and it was completely bolt-on—it drove just like it was stock. Once back on the dynamometer for testing, our jaws dropped when it calculated at 550 hp to the rear wheels—whoa! On the street, power delivery is smooth and linear and there's no debating the cool whoosh noises from the bypass valve. It really is the perfect blend of performance while maintaining utility in one seamless package.
| ProCharger's P-1SC-1 supercharger kit comes complete with supercharger, three-core intercooler, hard and soft piping, fittings, fuel injectors, wiring harnesses and all the hardware to do the job.
| Jumping right in, we removed all of the stock components. This included the entire front fascia, air filter with airbox, IAT sensor, PCV connections, washer reservoir, underside splash panels, and any wiring harnesses connected to foglights, etc.
| Removing the window washer fluid tank was quite the task. After draining most of the fluid, we took our time to disconnect each wiring harness clip and removed the tank. ProCharger provides a unique window washer fluid tank as a replacement, which we'll install later on during the process.
| We also removed the coolant overflow tank. Again, ProCharger provides a custom tank for replacement, which we'll install later.
| The most tedious process of the install was pinning the crankshaft. After removing the crank bolt, we used the supplied drill jig to drill a hole in the crankshaft and harmonic balancer.
| From there, we installed the supplied -inch by -inch-long stainless dowel pin into the hole.
| Of course, a solid foundation is always necessary. Supplied with our H.O. kit was everything we needed including the supercharger bracket. These brackets are not only kit-specific but made from thick aluminum, come pre-drilled with countersunk holes and are powdercoated to match the supercharger.
| After removing the factory tensioner, we removed the factory serpentine belt along with various power steering pump bolts. Continuing to follow the detailed instructions supplied from ProCharger, we installed all of the necessary spacers and bolts to the bracket.
| Beginning with the upper left bolt and spacer, we loosely mounted the bracket followed by the other bolts and spacers. Once all the bolts were hand-threaded, we tightened them all down for final.
| The factory belt tensioner was then reinstalled and tightened using a 16m socket.
| The heart of this unit is ATI's self-contained head unit. It is the first and only gear-driven centrifugal superchargers to feature self-lubrication. The unique oiling system not only eliminates the need for additional oil lines to the oil pan, however, also eliminates heat that would be transferred from engine oil and avoids the risk of clogged supercharger oil lines, drainage or leakage.
| Strength is provided by a billet case while inside you'll find exclusive billet impellers. Upping the ante, ProCharger offers a choice of standard or helical gearset for noise reduction.
| After removing the oil fill reminder tag from the head unit, we went ahead and installed the oil drain line. Applying this step now will eliminate having to feed the drain line to the head unit after it's been installed into the bracket.
| From there, we removed the fill plug/dipstick and using the supplied bottles of ProCharger supercharger oil, we filled the head unit as outlined in the instructions. Then reinstalled the oil fill/dipstick.
| Next, we fit the supercharger into the bracket. Using the supplied hardware, we began to thread in all the bolts for final and locked down the head unit.
| After mounting the supplied tensioner, we installed the newly supplied serpentine belt and checked for any potential clearance issues.
| To prepare for the intercooler, we continued to remove components from the front end. This included the ambient air temp sensor and plastic air diverters from both sides. We also relocated the horns as per the instructions.
| The upper radiator support brackets were then loosened and then relocated behind the radiator support where they were attached to the backside using the original hardware.
| Simply stated: cooler air makes more power. To leverage this advantage, ProCharger provides an intercooler with this kit. In a nutshell, compressed air from the supercharger enters one side of the intercooler where it makes its way through. This compressed air is then cooled by the airflow moving through the passages or fins of the intercooler. This newly cooled air is then fed to the throttle body and into the engine.
| At the driver's side, we mounted the supplied intercooler brackets to the factory horn mounting locations from earlier. We left those loose until we could correct any alignment issues for the passenger side.
| With the intercooler locked down and secured, we could begin routing all of the silicone elbows, tubing and hard piping. We began at the supercharger outlet using the 135-degree silicone elbow from the kit. From there, we worked our way to the front of the intercooler.
| Working our way to the passenger side, we finished installing the tubing and prepared the clamps to tighten for final.
| Next, we plugged the supplied IAT extension harness into the IAT sensor and into the factory harness.
| To complete the piping, we routed the final hard tubing from the passenger side, across the top of the radiator support and to the throttle body. We then connected the 90-degree silicone elbow to the throttle body and tightened all the clamps.
| The washer tank replacement from ProCharger may seem complicated but we assure you it's not. Simply re-install all the pumps from the factory tank to this new washer tank along with its associated grommets. The new tank then connects to the factory bolt and stud on the drivers side of the radiator support. After, we inserted the supplied washer neck into the washer neck bracket and onto the molded hose.
| Since real estate is quite limited with the addition of the supercharger, brackets and tubing, ProCharger also provides a brand new coolant reservoir as well. Using the supplied brackets we loosely mounted the tank bracket to the radiator support with the existing 10mm bolt. Lastly, we added any hosing and tightened clamps for final.
| One key piece of installation is the vacuum manifold. After assembling the plugs and surge valve barbs to the manifold, we located the brake booster hose on the driver's side near the firewall. We then removed a 3 -inch section of hose and secured the manifold with clamps. We then checked for any leaks.
| Central to the ProCharger supercharger systems are its use of bypass valves. Surge can occur when excessive boost or pressure spikes as a result of throttle blade closure or even tire slip. If the system does not bypass this excess pressure, damage to the supercharger can occur. ProCharger provides a ProFlow Bypass valves with 1.5-inch inlet and outlet diameters. Using the supplied hardware, we installed the bypass valve and attached the 3/16-inch vacuum line. We made sure to zip-tie any lines away from moving components and ensured the surge valve linkage is free from obstruction.
| Supplied with our kit were a complete set of upgraded fuel injectors. The install is quite simple and involved unclipping the wiring harnesses from each injector. Then, we removed the four 10mm bolts securing the fuel rails to the manifold. Once the factory injectors were removed, we could simply install the new injectors followed by the factory retaining clips.
| One of the final pieces of the puzzle was locating the MAP sensor, which we located on the passenger side of the intake manifold. We removed this sensor along with the O-ring and installed that into the supplied sensor adapter from ProCharger. Once installed back into the manifold we could finally connect the electrical harness to the new MAP sensor.
| We were eager to get the newly supercharged Jeep SRT back on the dyno. However, first we refilled all of its fluids and checked for leaks. Then, ran through all of the fittings once again. With the intake tube and air filter installed, we were ready to lay down some numbers on the dyno. Back on the rollers, the Jeep punched out 550 rear-wheel horsepower and 521 lb-ft of torque.