Mark Gearhart
July 27, 2017
Photos By: Rob Kinnan

Ah that beautiful five letter word, Boost. It brings a smile to any Mustang fan’s face. The quiet whine at idle and the sound of rushing air out the blow-off valve after a full throttle run just cannot be beat. ProCharger is synonymous with Mustangs on both the track and the street. Their supercharger units can support anything from 400 to over 3,000 horsepower.

The 2015 Mustang’s front end required ProCharger to re-engineer their Mustang kit. The front headlight design tapers at the front corners of the engine bay, making it tighter than the S197 chassis. The 2011-2014 kit also faced the inlet of the supercharger towards the firewall, with a cold air intake mounted above the coil cover. Air is now drawn from the front core support area to provide a denser charge of air and an increase in power.

The good news for the 2015 Mustangs is the Gen 2 Coyote engine platform. Better flowing cylinder heads, more aggressive camshaft profiles, and a more robust bottom end allows for more of that beautiful five letter word…boost. We know that the 2011-2014 Coyote kits used to make around 550 rear-wheel horsepower out of the box and ProCharger claims the 2015+’s will make 100 more than that with their all-new P-1X supercharger. Well, the only way to find out is to bolt-on a kit, right?

There’s four options for the S550 ProCharger systems. The High Output (Stage I) and Stage II intercooled kits both come in a tuner kit, which means you don’t get a fuel system or handheld Diablosport tuner. The Stage II system bumps up to a larger front-mount intercooler, a dedicated drive system for the supercharger, and the ability to go beyond the included P-1SC-1 supercharger, meaning 1,225+ horsepower with an F-1R is obtainable using the existing bracketry. So we did just that and equipped our system with ProCharger’s new P-1X. Boost comes in at 8-9 psi on the HO kit and 9-10 on the Stage II. Needless to say we opted for the Stage II kit.

ProCharger notes that their kit can be installed in 6-8 hours with hand tools and without the need for a lift. We’ve heard that seasoned installers can complete the transformation in as little as 3-4 hours! Regardless if you are a seasoned professional or first time supercharger installer, ProCharger includes a very comprehensive, full-color instruction manual for the kit.

HO System:
• 55-60% gain with P-1SC-1 complete system on 8 psi, quality pump gas
• Up to 70%+ gain with P-1SC-1 tuner kit and custom tuning
• Belts and pulleys can be changed without removing supercharger
• Three supercharger and bracket finish options–Polished, Satin, or Black
• No cutting of radiator hoses, or trimming of factory coolant fan - 100% reversible
• Handheld tuner available
• Retains the factory brake cooling ducts
• Self contained oiling head unit, with CBC billet gear case and impeller

Stage II System:
• 8-rib dedicated belt drive system
• P-1X up to F-1R (600 HP to 1,225+ HP)
• 300+ HP gain with P-1X complete system on 10 psi, quality pump gas
• Patented 8-inch supercharger crank pulley that fastens to the factory balancer
• Belts and pulleys can be changed without removing the supercharger • Handheld tuner available

1. First order of business was to see what the baseline power numbers on 93 octane were like. 375.9 horsepower and 332.0 lb-ft of torque to the rear wheels. About 10 horsepower more than the 2011-2014 Coyotes.

2. The goods! We unpacked the giant, rectangle box of goodies and prepared for a quick installation with some seasoned professionals.

3. Due to the placement of the supercharger bracket ProCharger includes a new radiator hose fitting that attaches to the thermostat housing that clocks the outlet.

4. ProCharger’s billet bracket and tensioner system bolts to the driver’s side cylinder head using existing mounting locations with spacers. An idler shaft installs on the front of the factory idler pulley to house the supercharger’s idler. This is not installed on the HO system, which uses the factory 6-rib belt routing.

5. The moment of glory! We opted for the black finish P-1X for a stealth appearance. The kit can be optioned with a wide range of ProCharger head units that can help the Coyote make over 1,200 horsepower.

6. ProCharger developed an ingenious and patented cam-lock front drive pulley. This system attaches to the stock Mustang crank pulley with six cam-locks and is easily removable.

7. Our complete kit comes with the needed direct-replacement fuel injectors and fuel pump booster to ensure that our supercharged stallion never runs lean. The voltage pump booster will increase the pump’s duty cycle through the activation of Hobbs switch while in boost.

8. The aforementioned Hobbs switch is installed on a vacuum block along with the blow-off valve. There’s a capped vacuum line off the factory charge motion control plates that makes this installation easy. Further ports are available for additional accessories like a boost gauge or intake air temperature sensor.

9. The behemoth intercooler mounts neatly behind the factory crash bar and uses the four mounting points on the back to hold the intercooler in place. No new holes or trimming of the factory bumper plastics are needed here.

10. ProCharger engineered a very clean, short travel path for the intercooler plumbing. This keeps the pressure drop down while maximizing responsiveness.

11. Here you can see the bypass valve that’s cleanly mounted off the supercharger’s charge pipe. ProCharger offers an upgrade to their race valve as well. Fresh air for the supercharger is picked up from the front bumper. This ensures the coldest air possible can be delivered to the head unit.

12. A new, fabricated coolant tank is included with the kit and adds a nice touch to the engine bay’s appearance.

13. A Diablosport In-Tune I2 tuner is used to flash the S550. The In-Tune can hold up to five different tunes and also serve as a DTC (Diagnostic Trouble Code) scanner if any issues were to arise.

14. With a fresh tank of 93 octane, we hit the rollers once again. Horsepower jumped considerably to 646.7 horsepower and 482.4 lb-ft of torque to the rear wheels. This is an astonishing gain if 270.8 horsepower and 150.4 lb-ft of torque to the rear wheels. That means the P-1X is adding around 30 horsepower per pound of boost at the engine!

15. The blacked out ProCharger Stage 2 fits perfectly within the S550’s engine bay. Additionally, we are blown away that we were able to pick up 300+ horsepower at the engine, just as ProCharger claims, with less than a day’s worth of work!


P-1X & D-1X

ProCharger’s P-1SC-1 and D-1SC head units are what come standard with most muscle car kits. They have now upped the ante with their new P-1X and D-1X, which can be optioned as an upgrade for any new system. These superchargers feature a new compressor wheel design, making them more volumetric efficient at the same boost levels. This new design decreases the parasitic draw required from the engine to spin the supercharger. ProCharger’s P1-X is designed to support up to 875 horsepower 1000+ for the D-1X.