The 2021 Ram 1500 TRX boasts a factory-listed 702 hp and 650 lb-ft of torque, but as measured on the crank, not the wheels. Hennessey Performance Engineering tried to measure how much power TRX gives to the wheels by tightening one to one dyno, but only ran numbers for the rear wheels.
The Dyno test showed 538 hp and 570 lb-ft of torque on the rear wheels. It represents around 17% driveline loss, which is not useless for a truck. Hennessey previously recorded 20% driveline loss on the rear wheels when it tested a Ford F-150 Raptor in 2019.
TRX is full-time four-wheel drive, so you might be wondering how Hennessey just got dyno results for the rear wheels. The company’s founder John Hennessey told Motor Authority that four-wheel drive was temporarily deactivated by disconnecting the front drive shaft.
2021 Hennessey Mammoth 1000 1500 TRX
While the TRX was designed for off-road driving, the amount of power produced by the 6.2-liter Hellcat V-8 compressor makes this truck quite fast on sidewalks. Ram says that it will do 0-60 km / h in 4.5 seconds.
Inevitably, that was not enough for Hennessey. The company has developed more powerful versions of all Hellcat-powered vehicles, and it does the same with the TRX. Called the Mammoth 1000, Hennessey claims that taking on the TRX will boast 1000 hp, will do 0-60 km / h in 3.2 seconds and drive a quarter mile in 11.4 seconds.
To achieve these numbers, Hennessey plans to equip the Mammoth 1000 with an upgraded compressor, pulley and air intake, stainless steel headers, high-flow exhaust pipe (catalyst container) and new engine mapping. The price for the complete truck is $ 135,350, and Hennessey only plans to build 200 this year.