When the 2015 Corvette Z06 first debuted it was hailed as the greatest Corvette ever. At 650 horsepower, it certainly was the most powerful. But for the technical wizardry that gave it incredible aerodynamics and gobs of power at every rpm, some owners have been left unsatisfied. To fit the hood line, GM elected to utilize the compact Eaton R1740 supercharger on the new LT4.
![Z06 Z06](/uploads/1/2/5/4/125449665/817650921.jpg)
Not wanting to leave any power on the table, the new blower turns more rpm than the C6 ZR1’s TVS2300 supercharger and is nearly maxed out. This poses a problem not only to aftermarket tuners looking to crank up the boost and make more power, but some have even said that it transfers excessive heat to the engine. While it might make 650 hp during its SAE testing, some chassis dyno operators have had trouble duplicating those numbers (minus drivetrain loss) on more than one pull. The excessive heat appears to have been involved with Motor Trend’s recent issue when testing the Z06, which went into limp mode. GM has since stated that the intercooler system hadn’t been properly bled since the previous user. Some would say that this opened the door to the aftermarket. Always the innovator, ProCharger was happy to step right through.
![Procharger Procharger](/uploads/1/2/5/4/125449665/937966375.jpg)
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Development began on ProCharger’s 2015 Corvette Z06 supercharger kit the minute it first hit the streets. Step one was replacing the Eaton R1740 with a fabricated aluminum intake manifold that looks nearly OEM and can handle anything you can throw at it. I mean let’s be honest, some will elect to run a D-1SC head unit but others will go nuts with a big ol’ F-1X. The intake manifold had to accommodate both crowds.
Next, the supercharger kit had to be designed in such a way that the owner of an $80,000 supercar would feel there were no compromises – none of the typical worries about adding an aftermarket system. And then finally it had to make power, and gobs of it. It seems obvious that just putting a large blower on would accomplish that, but to appeal to your everyday Z06 owner it needed to make power with even a D-1SC and minimal changes.
After completing preliminary testing it appears that the new kit does that and more! Using the smaller P-1SC-1 head unit set to 10 psi (same as stock) along with factory ignition timing and fueling, the kit picked up 115 horsepower. With 91-octane pump gas, ProCharger was able to crank up the boost to 13 psi on the P-1SC-1 and hit 720 rwhp – still with no changes to timing or fueling. With an aftermarket cam, fueling changes, and a larger head unit the potential of this kit is 1,600 hp, according to ProCharger. While we know of at least one build already out there that has hit 1,000 rwhp, we were curious what your average guy with bolt-ons could accomplish using this kit.
ProCharger got us hooked up with just such a vehicle. The build plan included the larger D-1SC head unit, headers, and meth injection. The engine: stock. The cam: stock. This was going to be interesting.
At 13 psi with the D-1SC, the Z06 belted out 679 hp and 592 lb-ft of torque at peak. As you can see by the graph, the power delivery is completely different. The boost increases linearly with the rpm with any centrifugal supercharger, which makes the top end capabilities far exceed a roots blower.
Though its average power is higher than stock, it does give up some torque. However, its average boost pressure (7.1 psi) is lower than the baseline (9.0 psi) because the D-1SC is a larger blower and not quite in its efficiency range, unlike the R1740 which is nearly maxed out. When this car returned to Texas, Custom Corvettes of Corpus turned up the boost to 15 psi, added methanol injection, and long-tube headers. The result: 808 rwhp! The difference between 13 psi is substantial when you look at the torque curve. The D-1SC is much more efficient at this boost level, which helps it to hold 600 lb-ft from 3,400 rpm up to redline – topping out just shy of 800 lb-ft. Though it is not an apples-to-apples comparison, given the different dynos, it certainly shows the potential of the ProCharger kit with no internal changes to the LT4.
Description Building on a 20-year history of forced induction engineering and innovation, ProCharger was the first supercharger manufacturer to design and release a highly efficient air-to-air intercooled supercharger system for the C7 Corvette Stingray. With an original bracket design and belt-drive system unique to the C7 Stingray platform, ProCharger P-1SC-1 intercooled systems and tuner kits continue to lead the industry in OEM-style fit and finish, ease of installation, and reliable performance. Our C7 Corvette Stingray HO Intercooled Systems with P-1SC-1 are supplied with proven tuning calibrations and a handheld programmer set for a 40%+ power gain over stock, on 7 psi of boost and pump gas. Higher boost levels and horsepower gains of up to 50% are possible with an Intercooled Tuner Kit and custom tuning, and even higher with modified motors. For hyper-custom racing builds, F-Series supercharger models up to the 10.5” volute (F-1X and F-2) can be installed without the need for additional brackets.
These ProCharger systems also give Corvette owners multiple options in both the performance and appearance arenas, with your choice of a vertical or horizontal-mounted intercooler, a supercharger air inlet with race-style filter or a factory air box interface, and either polished, satin, or black finish for the brackets and head unit.