So I am logging torque...

[bballer182]

Ah... that would be why you are seeing some of the things you do. BBL'ing offers way more PIDs than laptop. I believe the TCM TQ PIDs that im talking about and some of the TP PIDs are only available in BBL: mode.

[bballer182]

using engtrqref dma. But the logged values are not really matching B1115.

What am I missing?

If I set torque equal to, say 150 ft-lb across the entire 20% throttle row of B1115, then apply 20% throttle, I would expect to see a steady150 in the log. Oddly though, as rpm increases, logged trqref increases also. ??? Then in torque based fuel, fuel increases because of this. So I am perplexed here.

I have actually responded to this yet...

Even if you have set the max or a constant TQ at a given TP%, B1102 will still adjust fuel at different RPMs.

For instance take a look at 554ft/lb TQ ref in table B1102. 70.56 70.56 75. 73.5 74.8 74. 74.6 73.4 71.6 73.9 73.2 73.3 74. 80.1 77.9 82.2 83.2 84.05 82.9 83.1 82.8 83.6 82.8

See, for the same TQ ref you go from 70.56mm3 @300RPM to 82.8mm3 @4800RPM

Are engtrqref PID and the values entered in B1115 un-related?

This is the main reason i would favor limiting power output with the TQ based fuel table B1102 rather than limiting TQ based on TP, because if you do limit power output by B1115 you also have to alter B1102 anyways to get the fuel you want for that given tp%. Which, incidentally after you have done that to B1115 and B1102 you have kind of transformed 3D mapping in to the stone age 2D mapping. Basically eliminating the need for B1115 altogether.

Just my thoughts i guess.

With respect to the engtqref.... I would try out BBL. this has proven it self to be, on top of being more convenient, more accurate in logging also.

[JoshH]

I use GM.TP to log accelerator pedal position.