Hennessey-tuned 895kW Jeep Trackhawk cracks 9-sec quarter mile

Hennessey has been up to his old tricks, and created a hypercar crushing SUV

Hennessey Trackhawk Front Jpg

THE Jeep Grand Cherokee Trackhawk is an exercise in excess, with the Dodge Hellcat engine wedged behind its snout producing 522kW and 868Nm for supercar-slaying performance.

Well, for one Texan, that wasn’t quite enough. By now you should be familiar with John Hennessey and his tuning company, which has a reputation for fettling already powerful cars to produce unhinged monsters.

His latest creation is the HPE1200 (catchy name), which is a kit available for the Jeep Trackhawk. And the results are, well, predictably eye-opening.

The HPE1200 involves fitting upgraded pistons, rods, ported cylinder heads, a new camshaft, long-tube stainless steel headers, and a larger 4.5-litre supercharger - the latter of which pumps 22psi of boost.

The end result is a dyno-tested 748kW, along with 1209Nm of torque. Hennessey calculates this to be 895kW/1491Nm at the crank.

The upgrade drops the Trackhawk’s 0-60mph (97km/h) to 2.3 seconds, while the quarter mile is taken care of in 9.6 seconds at 233km/h.

When we performance tested the standard Trackhawk at Winton earlier this year, we cracked the quarter mile in 11.6 seconds, with a trap speed of 186km/h. The 0-100km/h sprint was reeled off in 3.7 seconds.

With that context provided, Hennessey’s upgrades become all the more staggering, cutting a full two seconds of the 400m dash.

For further comparison, a McLaren 720S takes around 10 seconds the complete the quarter mile. Same goes for the 515kW Porsche 911 GT2 RS.

We should mention that our test of the Trackhawk – which, admittedly, included time on Winton’s rallycross track – obliterated the record for single day fuel-consumption on a Wheels test, with deputy editor Andy Enright reporting 49.7L/100km. We don’t even want to think about the size of the fuel bill the Hennessey would produce, particularly since it’s tuned to guzzle 109-octane jungle juice.

And there’s a caveat to the incredible straight-line performance achieved by the Hennessey Trackhawk. Its numbers were achieved with Nitto 555R 275/40R20 drag radials fitted to each corner. Not exactly street-appropriate rubber.

Want one? Hennessey is building just 24 HPE1200s, setting you back US$179,000 (A$250,657) each, or a miserly A$280 per kW.

It’s a bargain when you consider you’d be able to embarrass McLaren 720S owners for half the price.

 

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