Lightly Modified Corvette ZR1 Sounds Great, Runs Greater
C7 Corvette ZR1 built by Late Model Racecraft makes 807 wheel horsepower on a conservative tune.
The new Chevrolet Corvette ZR1 is an absolute beast, hitting the market as the most powerful road car that General Motors has ever offered while being the third-most-powerful American production car ever. With 755 horsepower and 715 lb-ft of torque, the new ZR1 will beat just about any stock production car from any automaker in the world, but modified cars obviously pose more of a challenge.
For those Corvette ZR1 owners who want to reduce the number of cars on the road that might beat them, the team at Late Model Racecraft has the answer. Actually, LMR has multiple options for owners of LT5-powered vehicles and today, we bring you a look at their LMR1000HP package in a pair of videos from the shop’s official YouTube channel.
Unfortunately, Late Model Racecraft doesn’t have the details of this package on the company website just yet, but when they shared these videos on social media, they listed a handful of automotive brands that lend some hints as to what might be involved in the build. This includes Cam Motion and American Racing Headers, so when coupled with the sound of the car on the dyno, it is safe to guess that this car has an aftermarket camshaft and a set of headers.
Since LMR performs cylinder head work, there could be some internal work done to this LT5, but with roughly 200 extra wheel horsepower on a conservative tune, we would guess that it has an aftermarket upper pulley, lower pulley or both. As for that tune, the video details explain that the car only has about 250 miles on the odometer, but when they get up to 1,000 miles, the shop will lift the output to 900 wheel horsepower.
Worked LT5 in Action
In the video above, we watch at a C7 Corvette ZR1 with the LMR1000HP package works out on the dyno. The camera angle changes a few times, allowing us to hear the LT5 roar from different perspectives and in every one, the cammed-and-tuned ZR1 sounds absolutely amazing, including the last bit where the car is idling.
The first video ends with a look at the dyno sheet, showing 807.79 horsepower and 775.70 lb-ft of torque at the rear wheels, up from 609.17 horsepower and 588.36 lb-ft of torque in stock form.
The video below is just for those folks who love to listen to the chop of a cammed V8, as it is a simple walkaround with the engine idling.
Crank up your speakers and enjoy the fruits of Late Model Racecraft’s labor.