A few weeks back, Hennessey Performance announced their HPE1000 package for the 2018 Jeep Grand Cherokee Trackhawk, delivering 1,012 horsepower and 969lb-ft of torque rather than the 707hp and 645lb-ft torque offered by the stock Trackhawk. Unfortunately, with the Trackhawk not being available yet, some people questioned the validity of the Hennessey claims, but we should keep in mind that the Texas tuner has been working with the Hellcat Hemi in Challegners and Chargers over the past few years, so the numbers for the HPE1000 Trackhawk package are likely estimates based on previous Hellcat Hemi builds.
Even without having worked on a Jeep Grand Cherokee Trackhawk, there is a good chance that the Hennessey HPE1000 package will deliver on its claims. Even if you don’t believe Hennessey’s estimated claims, this is the first widely publicized upgrade package for the Trackhawk and it previews the kinds of power numbers we were see from the beefed-up Hellcat Jeeps once they begin reaching owners around the country.
The Hennessey HPE1000 Jeep Trackhawk
The Hennessey HPE1000 package for the Jeep Grand Cherokee Trackhawk begins by removing the standard 2.3L IHI supercharger and replacing it with a 4.5L Whipple unit. Hennessey also adds a high flow air induction system, upgraded fuel injectors, a boost-a-pump fuel pump upgrade, long tube headers and a custom engine calibration to bring it all together. When the boost is cranked up to 14psi, the extra air volume of the Whipple allows the 6.2L Hemi to deliver 1,102 horsepower and 969lb-ft of torque at the crankshaft – which based on Hennessey’s estimates should yield right around 800 all-wheel horsepower.
When this package is installed, the Jeep Grand Cherokee Trackhawk with the HPE1000 package is expected to dash from 0-60 in just 2.8 seconds while running the quarter mile in 10.5 seconds at 133 miles per hour.
We don’t know the pricing for the HPE1000 package, but as we all know, Hennessey kits are generally on the more expensive side when compared to the smaller shops, leading those folks who have gotten more power for less money to question the Hennessey packages. With that in mind, critics of the HPE1000 package should look forward to the creations of those smaller shops which focus the majority of their efforts on modern high performance Mopars. We have seen countless shops turn out record-setting Hellcat cars, often offering far more power than the comparable Hennessey package, so if HPE can get 1012hp and 969tq from a Trackhawk – just imagine what Hellcat tuning experts like Josh Schwartz from High Horse Performance or Tim Barth from Barth Tuning will be able to do with the supercharged Hemi Jeep.
In short, based on the Hennessey HPE1000 package, the leading Hellcat tuners like the two mentioned above will almost certainly be able to find even more power – likely leading to some of the quickest modern Mopar machines to date.