Built in Dyno ???

[mwt18]

I was playing around with my Diablosport Trinity today and found a parameter called "Engine Actual Steady State Torque". I turned it on and it seems like a pretty accurate measurement of the engine torque output. I also logged a WOT run in 2nd gear and plotted it against RPM. The trend of the curve follows my real dyno curve really closely. It is about 15% higher, though.

Does anyone know how the ECU measures/calculates the "Engine Actual Steady State Torque" and how accurate it really is?

Here's a couple of pics.
1. A pic of the gauge (at idle).
2. Plot of Torque vs. RPM.

[Tampa Tuning]

I've set up my HP Tuners to have a PID for delivered torque. Its not accurate, but its a good gauge. Its consistant, but not accurate. I use it as a gauge to see it I picked up torque when adding fuel or timing, or if it drops off. Its a good instrument, but not true. Im not sure if yours is the same

[mwt18]

Originally Posted by Tampa Tuning

I've set up my HP Tuners to have a PID for delivered torque. Its not accurate, but its a good gauge. Its consistant, but not accurate. I use it as a gauge to see it I picked up torque when adding fuel or timing, or if it drops off. Its a good instrument, but not true. Im not sure if yours is the same

Well, that's interesting.. I could make an argument that most dynos aren't really that accurate, but they are more for comparison purposes. It seems to me like this PID may be a useful tuning tool after all. And if so, it would actually be better than a dyno tune since the car gets true loading and air flow during the pull.

Sure wish Ted Jannetty would chime in.

[JANNETTYRACING]

Originally Posted by mwt18

Well, that's interesting.. I could make an argument that most dynos aren't really that accurate, but they are more for comparison purposes. It seems to me like this PID may be a useful tuning tool after all. And if so, it would actually be better than a dyno tune since the car gets true loading and air flow during the pull.

Sure wish Ted Jannetty would chime in.

The reported torque can and will be Skewed by the Tune depending on tuning procedures.

I can make it read very high or very low and not change the power output.

A Dyno is Still the Best way to Accurately see if you gained or lost when making changes because it is independent of the car.

Ted.

[mwt18]

Originally Posted by JANNETTYRACING

The reported torque can and will be Skewed by the Tune depending on tuning procedures.

I can make it read very high or very low and not change the power output.

A Dyno is Still the Best way to Accurately see if you gained or lost when making changes because it is independent of the car.

Ted.

That definitely deflates my bubble. But it's not completely busted, yet... =)

Do you know how the ECU measures this output? Can you say more about what tuning procedures affects it's value?
Thanks

[JANNETTYRACING]

Originally Posted by mwt18

That definitely deflates my bubble. But it's not completely busted, yet... =)

Do you know how the ECU measures this output? Can you say more about what tuning procedures affects it's value?
Thanks

All I can say is it is Calculated based on multiple Sensors