Big Diesel = Big HP? Tow-Spec Denali on the Dyno!

Manuel’s Denali tow rig is truly heavy duty. This diesel-fed behemoth has upgraded shocks from Fox, fancy 35” wheels from Fuel, and a 6.6L Duramax V8. Since he added some beep boops to give him tuning options, though, he has no idea what power it makes. Thankfully, we’re here to help.

MANUEL FERNANDEZ / 2020 GMC DENALI

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00:00 Intro
02:06 Manny's 2020 GMC Denali
05:09 Predictions & Prep
06:05 Pull 1: Base Run
06:53 Pull 2: More RPM
08:01 Pull 3: ALL the RPM
09:57 The Powerboard

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[kevinwicklund]

That Duramax has never revved to 7k, if it did it wouldn't be running anymore!

[geebeee]

There’s no way it goes to 7000. 3500 rpm is were the powerband is at. Shouldn’t spin more than 4000 rpm

[keedoopop]

7k rpms? And you can hear it banging the limiter at 4k lol

[ryanhamil]

This man is confused that motor would be all over the shop floor at 7k rpm

[akmjolnir-vr]

Will you fellas start listing both the HP & TQ for all these dyno runs? It would be cool to see the power/torque curve to see usable power vs. a dyno queen.

[andydelassus]

0:47 Fun fact: Olympic cyclists can generate about 2 HP (1500w) in short bursts.

[donaldford]

The video I think we all want to see is the one where you actually spin that Duramax to 7000 rpm and make predictions on what RPM components begin to fly through the shop. I'll bid 5500.. Anyone else have guesses?

[latrinedveen]

No way in hell a diesel spins to 7k without being modified down to the hardware super clean and decent power for stock plus tho

[firedell]

Those were the quickest dyno pulls I've ever heard.

[krisstanis]

Bout to have the EPA running through that shop

[BUBBYZZ]

9:05 only time she will see 7k is when she runs away 🤣

[Renoalex]

7k with a duramax diesel... I'm not believing that. 3500rpm sounds about right for a diesel

[neckbonejones]

7k rpm basically stock Duramax? 😆 SEE what happens.

[StrykerWolf]

That thing will never see 7000rpm, that's crazy lol

[scharlie]

Lmao the factory gauges don't even rev to 7k

[Kettenhund]

I expected more too, hert. Don't feel bad. It is a GMC, after all. Now if you guys can get a CUMMINS to come run that dyno... WHOOO!

[gagemeyer]

I love how y’all tested horses on a torque based build

[xXAKJoKeRXx]

I don’t care what you’re paying him, video editor needs a raise😂 the edits always have me dying laughing.

[TriggerFingerTV]

We got a random truck from the parking lot….
Yeah they’re 35in fuels and it’s suppose to turn 7, 000 rpm 😂

[chrisshupe]

Please film the 7k rpm episode 🙏 first piston to pierce the sun 🫡