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Dyno Tuning and Fuel System Limitations

4:15
40:38
773.3K views

At 4:15 in

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

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What happens here

With the wastegate temporarily fixed, the team conducts a full dyno pull. The initial results show 370 horsepower and 450 lb-ft of torque to the wheels, with significant improvements from the previous stock baseline. However, the tune reveals that the stock fuel injectors are maxed out, preventing further power gains and causing the ECU to enter limp mode. This indicates the necessity of a full fuel system upgrade.

Goal: Assess current power output and identify fuel system limitations.

Tools and materials

  • Dynojet Dynamometer Dynojet — Measuring power
  • GMC Yukon GMC — Vehicle being tested
  • Laptop with Tuning Software Dell — Monitoring engine parameters and making tuning adjustments

What they say

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and i'm gonna see if i can angle this thing between ashton's truck and the 632 heat it up on the dyno over there let's fire it up this is a diesel habit like i turn the key and i let it sit there for a second for the glow plugs that aren't even there it's just when i see this interior that's just where my brain goes because my duramax looks exactly the same i'm gonna double check the transmission fluid level real quick because in bradenton at cooper's uh we put this csf uh transmission cooler in here and you know when you do that you lose some fluid in the lines and the other cooler and stuff well we put more in to move it around but we never really like double triple quadruple check the level to make sure it settled off where it's supposed to so obviously before we start gripping on the dyno um i'm gonna do that while this thing is

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