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Second Dyno Pull and Data Interpretation

5:00
25:38
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At 5:00 in

Turbo LS Horsepower Test! E85 Ethanol vs Pump 93 Octane (What's The REAL WORLD HP Difference?)

What happens here

After reconnecting the knock sensor and addressing the immediate issues, the car performs another dyno pull. The power output improves to 477 horsepower, but the graph still shows a 'wavy' line, indicating inconsistent power delivery. The tuner explains that the dynamometer's current setup (using the coil wire for RPM signal instead of OBD-II) causes inaccurate torque readings and contributes to the wavy power curve. They decide to continue adjusting the fuel mapping and timing to smooth out the curve and maximize power.

Goal: Analyze new dyno data, identify remaining inconsistencies, and refine tuning strategy.

Tools and materials

  • Laptop with Tuning Software — Analyzing dyno graphs and making tuning adjustments

What they say

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doctors is that all it's just boiling off the manifold yeah i need them to find the wideband we need to find the y band 477 it's climbing still definitely not where it's supposed to be though um why doesn't it show torque can we get it to say torque yeah uh and the thing is since it's we're going off your uh your coil wire instead of the obd so the rpm which is which is calculated for the torque it's kind of jumpy because the coil wire isn't as accurate as obd oh i could try it but it's probably gonna look all haywire but just because it's like you know we're making the pool and the rpms are bouncing around yeah it's not getting a good read on your coil wire oh and so the rpm goes through like a uh some kind of algorithm and then they calculate support with everything else interesting well that doesn't make sense because horsepower is a function of torque so torque would have to be an accurate number in order to get horsepower to begin with i don't know how that makes any sense but it ain't my dino so oh well so that power bump was just from the fuel difference

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