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Final Dyno Tuning and Driveshaft Failure

8:30
40:38
773.3K views

At 8:30 in

What Happens If You Turbo a 5.3L Yukon With No Other Mods? Lets Find Out! (Uncle Rob Hits the Dyno)

What happens here

With the upgraded fuel system installed, the team returns to the dynamometer. They perform several dyno pulls, making real-time tuning adjustments to optimize fuel delivery and ignition timing. After a few runs, the vehicle puts down an impressive 630 horsepower and 800 lb-ft of torque. However, the driveshaft unexpectedly snaps, ending the dyno session prematurely.

Goal: Optimize engine tuning and achieve target horsepower, while addressing unexpected failures.

Tools and materials

  • Dynojet Dynamometer Dynojet — Measuring horsepower and torque
  • GMC Yukon GMC — Vehicle undergoing tuning
  • Laptop with Tuning Software Dell — Making real-time adjustments to the ECU tune

What they say

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that's great i mean this thing kind of looks like a brick it's going with the theme it's brick colored is it ready for choo-choo noises yet yeah we're gonna put it on speed density and let her eat you ready for some sauce candy man are you ready to get back to yellow belly yes i am i was wanting to go last night yeah me too and then it rained a lot more than rain happened last night this is uh this is a big big deal a lot of people miss this break torque management yeah see that one yeah that right there will make them not do burnouts really that one to a zero will make this thing not do a burnout now it'll do a burnout even when they're stock even when they're stocked that will change it from being able to not go from a burnout to a burnout so you even if the bone stock you change that one to a zero you can do burnouts yes well seeing as we now have a turbo kit on this beast can't validate that theory one of you guys go try it see if it works what what happened he brings it i didn't break it yes you did what do you mean it won't flash it just says it's not found every time i was like i feel like we're working backwards detect protocol failed yup so now we gotta pull ecm out can we like go to a junkyard and put a 411 in it or does it not work like that it doesn't work like that you have to swap some pins and all kinds of stuff and it ain't worth it i don't know what this is this is probably old flat toeing stuff yeah this used to tow this used to get towed behind the family motorhome unit look at that custom ground up there hey this is for my fan dale watch out oh no don't tell logan she's gonna freak out why she loves that headlight she loves putting it back in it's like her favorite thing in the world ladies and gentlemen tanner sebs removing the pcm because he

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