Tech-2 Fun

swathdiver

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Took the Yukon out for a run and took a Snapshot of the Transmission Data to record the engine torque and some other things. Once home, I played the Snapshot on the Tech-2 back at my desk, hooked up to shore power, and plotted the data on an excel spreadsheet. Decided to use only the 1st gear data even though peak torque occurred in 2nd to get the data started down low, at just over 1000 rpms. Anyway, I was able to make this nice little power graph for the 5.3 LC9 and will do it again with the Sierra's 6.2 L9H soon. Fun stuff.

You guys with Tech-2s can do this too with the help of Excel as well.

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She's a little down on power with the leaky intake gaskets, that'll get taken care of before January ends. That's the plan anyway!
 

Dantheman1540

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Any idea what factors it uses to calculate this? I have an Ultra Gauge 2 and it has an "Instant Horse Power meter" Where it tells you exactly how much power your supposedly making in real-time. I never really used it because I figured it was total BS but was always curious what it factors in.
 

swathdiver

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Any idea what factors it uses to calculate this? I have an Ultra Gauge 2 and it has an "Instant Horse Power meter" Where it tells you exactly how much power your supposedly making in real-time. I never really used it because I figured it was total BS but was always curious what it factors in.

I don't know. Since it's in the transmission section, I reckon it comes from the drivetrain torque calculations and force applied to the wheels depending on load and speed, maybe.

The horsepower number, figured mathematically from Torque and engine rpms, is basically spot on with the Rear Wheel Horsepower through the traps in the quarter mile.
 

Dantheman1540

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I don't know. Since it's in the transmission section, I reckon it comes from the drivetrain torque calculations and force applied to the wheels depending on load and speed, maybe.

The horsepower number, figured mathematically from Torque and engine rpms, is basically spot on with the Rear Wheel Horsepower through the traps in the quarter mile.

That's impressive that it's spot on! I might have to try it in the Tahoe and see what it comes up with if it has that option. I think I remember seeing it as an option on my Tacoma which uses a similar system to the GMT900 torque-based calculation junk that I don't understand because I only speak GMT800. It would be really cool if it was something people could use to better guesstimate their power levels.
 

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