It comes as no surprise that the three biggest Corvette tuners would have their own version of the 2015 Corvette Z06. The supercharged Gen V LT4 mill seems ripe for a pulley upgrade and tuning, but then again the high-spinning 1.7L Eaton R1740 TVS supercharger is already near its max efficiency. Unlike the C6 ZR1, the C7 Z06 doesn’t leave nearly as much headroom.
Case in point, the folks at Lingenfelter Performance Engineering replaced the factory balancer with a proprietary design that utilizes a 9.2-inch supercharger drive pulley. At 15% overdrive, LPE maxes out the little blower. A new belt and 100mm idler pulley kit, along with a Green Air filter, 170-degree thermostat, and tuning complete the 720 horsepower package. Torque hits 730 lb-ft. Dyno testing, badges (fender, interior, and engine), a certificate of authenticity, and a 1 year/12,000 mile warranty are included in the nearly $4,000 package.
Callaway’s approach was quite a bit different in replacing the little R1740 with its own patent-pending GenThree supercharger, based off the 2.3L Eaton TVS, that is 32% larger. Using a triple-element intercooler and exposed housing, the supercharger is better able to dissipate heat for more consistent lap times. The supercharger hood surround, carbon fiber engine mid-covers, intake, floor mats, door sills, badging, plaque, key fobs, documentation, and 3 year/36,000 mile limited warranty are included. Callaway says the package makes 757 hp at 6,200rpm and 777 lb-ft of torque at 4,500rpm. The redesigned manifold evens out airflow distribution for a more broad torque curve, stretching 500+ lb-ft from 2,000 to 6,400rpm. As the result, 0 to 60mph times hit 2.8 seconds while the quarter-mile is a stout 10.5 at 131mph. Best of all this performance comes at no penalty to emissions compliance, and is offered with an optional 5 year/60,000 mile warranty through Callaway’s authorized dealer network. Exhaust, short-throw shifter, car cover, and museum delivery are available at additional charges. Total price is just under $17,000.
Not to be outdone, the folks at Hennessey simultaneously released the HPE800 Upgrade for the 2015 Corvette Z06. Hennessey Performance utilizes a lower pulley to increase boost along with ported cylinder heads, a custom camshaft, cold air induction, and tuning to hit a scorching 800 hp at 6,500rpm. Upgraded valvesprings and lifters, new gaskets, fluids, dyno tuning, and road testing are included. HPE even provides a serial-numbered dash and engine plaque, along with exterior badging and floor mats. This comes with a 2 year/24,000 mile limited warranty. Options include carbon fiber door sill plates and H10 Monoblock wheels. Pricing was not released. A 750 hp version is also available, which increases the boost and adds long-tube headers to the stock LT4.