Watch Hennessey’s Ram 1500 TRX–Based Mammoth 1000 Hit the Dyno

By now, you must be wondering what Chrysler hasn’t shoved its mighty supercharged 6.2-liter V-8 engine into. It seems everything coming out of Auburn Hills, Michigan, these days is at least available with Hellcat power, which translates to 702 horses and up. While we wait with bated breath for, say, a Hellcat-powered Fiat 500L or Chrysler Pacifica minivan, let’s turn our attention to the latest Hellplant (Hellcat transplant): the Ram 1500 TRX. It gets 702 hp, making it the quickest pickup we’ve ever tested. Tuning outfit Hennessey thinks that isn’t enough and is developing the Mammoth 1000 version with a claimed 1,012 hp.

Don’t believe it? Well, Hennessey figured you might not, so it’s released a video of the Mammoth 1000 on a dyno, where it lays down some serious numbers. Granted, some of you might not be capable of fully removing your tinfoil skeptic’s hats, and we get that—we haven’t verified the dyno settings, nor have we run a Mammoth 1000 on a dyno for ourselves. So all we’ve got at this point is this video and Hennessey’s word that the 761 hp and 707 lb-ft of torque recorded at the rear wheels is accurate.

Per Hennessey, those figures eclipse the stock Ram 1500 TRX’s by 176 hp and 140 lb-ft, again, as measured at the rear wheels. The baseline estimate for driveline losses between the engine and the drive wheels is fifteen percent, meaning if we do some quick back-of-the-napkin math, the Mammoth 1000’s modified Hellcat V-8 is laying down … 895 hp. That’s not 1,012, as Hennessey claimed the Mammoth 1000 would deliver when it was first announced.

Best we can tell, however, Hennessey isn’t finished testing its super-truck.  This appears to be just one run of many. Good thing, too, because if this run were true “validation” for the 1,012-hp figure, it would mean the Ram 1500 TRX suffers from roughly 25-percent driveline power losses. In the video description, Hennessey reminds its fans that it offers “guaranteed” 900- and 1,000-hp upgrades for Hellcat-powered vehicles, so eventually the 1,000-hp figure should be attainable even in the TRX-based Mammoth 1000.

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