Texas tuner Hennessey Performance Engineering is known for their performance packages that substantially increase the power of GM and other American-built cars and trucks. Right after the initial introduction of the Corvette ZR1, HPE came out with their ZR700 package which boosted the ZR1′s horsepower to 705. Hennessey also offers the ZR750 package which brings the power on tap to 755-ponies, a ground-pounding 728 pounds-feet of torque and a top speed in excess of 224 mph! If those kind of numbers appeal to your inner racer, we encourage you to read on.
Hennessey’s ZR750 boosts the already impressive 638-horsepower from the ZR1 by swapping out the stock supercharger pulley to a smaller pulley which increases boost from 9 to 13 psi. A new air intake, custom ported cylinder heads, hotter camshafts, a high-flow exhaust and tuning the ECM are also added.
With the new parts in place and Michelin’s Pilot Sport Cup tires bolted on, the ZR750′s 0-60 time is 2.8 seconds and the car runs the quarter mile in 10.3 seconds at 139 mph. Top speed of the tuned ZR1 is in excess of 224 mph.
Ride along in this video with John Hennessey as he test drives a 2011 Corvette ZR1 with the Hennessey ZR750 upgrades.
Pricing isn’t listed on HennesseyPerformance.com but one feature that potential customers will take to heart is Hennessy’s modifications come with a 3-year/36,000 mile limited warranty.