US tuner manages to extract even more power from wild SUV's supercharged Hellcat engine.
Hennessey has announced it has created an even more powerful version of Jeep’s already mighty Grand Cherokee Trackhawk.
The base HPE850 Upgrade raises power from the standard Trackhawk’s supercharged 6.2-litre V8from 527kW/874Nm to an incredible 635kW/1146Nm
If that’s not enough, the Texan tuner will also offer a HPE1000 package that boosts power even further to a herculean 755kW/1314Nm.
This has had a dramatic effect on performance, with Hennessey claiming that post-mods, the big heavy SUV is capable of hitting 60mph (97km/h) in just 2.8 seconds — a huge improvement over the Trackhawk’s benchmark-setting 3.6sec 0-100km/h time.
Liberating the additional power and torque has required extensive under bonnet tinkering including a larger supercharger, upgraded fuel injectors, new high-flow fuel pump, revised exhaust and cold air intake.
Hennessey hasn’t confirmed pricing for the performance upgrade but it’s thought the HPE1000 upgrade could weigh in as much as $US50,000 ($A65,000) on top of the $134,900 Jeep charges for the Grand Cherokee Trackhawk in Australia.
Back in the US, if you opt for the Hennessey performance upgrade each car comes with a before and after dyno certificates, is subjected to more than 300km shakedown testing and comes with a one-year/20,000km warranty.
It’s not known if Hennessey plans to offer the performance upgrades globally as a retrofit option, which could see it eventually head Down Under.
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