Diesel truck lovers and Hoonigan followers, here is the episode of Dyno Every little thing you have been ready for. It does not function a fire-breathing engine boosted to the stratosphere, neither is it rolling with a ginormous suspension elevate. What we’ve got right here is an effective ol’ GMC Sierra with some wheels, an engine tune, and based on the truck’s proprietor, that is it.
To be particular, the truck in query is a 2020 GMC Sierra HD Denali packing the turbocharged 6.6-liter Duramax diesel V8 engine. Intercooler piping is upgraded, and it is operating a tune that goes to “stage 5” per the proprietor, although parameters on the tune aren’t talked about. Beneath, the suspension has a leveling equipment with Fox shocks, and all of it rides on Gasoline wheels.
It is a quick checklist of modifications, nevertheless it’s sufficient to smoke out the dyno room on the truck’s first pull. The diesel is certainly operating wealthy sufficient to roll some coal, although whether or not it is an intentional tune for that or only a side-effect of additional energy is unclear. A inventory 2020 GMC Sierra HD Denali is rated at 445 horsepower on the crank, which equates to roughly 380 on the tire. The Hoonigans predict wherever from 399 to 550 wheel hp, so of their eyes, the modifications make nearly no distinction or all the distinction.
After all, we all know there’s additionally a 3rd possibility – someplace in between. And that is just about what we get with the primary run, laying down 467 hp. The second run with “extra RPM” produces 478 hp, although the engine nonetheless cuts out at round 4,000 rpm. Equally, the ultimate run with “all of the rpm” has the identical cutoff, nevertheless it yields 481 hp.
However hey, this can be a diesel so what about torque? Solely the ultimate run reveals a torque determine, which is a formidable 771 pound-feet peaking at 3,100 rpm. Peak horsepower comes on at roughly 3,400, as you’d anticipate from a giant turbo diesel. Presumably, the proprietor’s informal point out of spinning the Duramax to 7,000 rpm for extra energy on the finish of the video is a joke.
We are saying presumably as a result of he does not appear proud of the diesel’s output. Nonetheless, factoring in a parasitic drivetrain lack of 15 %, we’re taking a look at roughly a acquire of 100 hp. That appears fairly good for some pipes and a tune, however what do you suppose? Gentle up our feedback together with your ideas on this unlikely Hoonigan dyno journey.