Summary

00:00 - Lee Charles has asked, do you have any content on tuning throttle requested torque maps, what are some things to consider when tuning these maps? Torque based ECUs, for those who aren't aware, essentially what we have is a torque request or driver demand table which is a three dimensional table of driver accelerator pedal position versus RPM.
00:19 And the numbers populating that table are the requested torque values.
00:23 And once we've done this, once we've got this table developed, essentially the ECU will then look at the RPM in accelerator position and decide how much torque the driver is requesting and from there it can decide what amount of throttle opening to apply to our drive by wire throttle body or maybe how much boost to produce in a turbocharged engine in order to achieve that specific torque value.
00:46 So once we've got that table developed, the actual tuning process of fuel and ignition is the same.
00:52 What we're going to want to do is make sure that our drive demand table actually matches the torque that our engine is likely to produce.
00:59 So for example if we're tuning our engine, it's likely that we're going to be increasing the engine torque and we need to represent that in the driver demand table so that the numbers are pretty accurate to what the engine is producing.
01:11 If we don't get this right we can find that despite the changes that we've made to the engine it doesn't develop the torque and power it should do because the ECU is artificially limiting our throttle opening.
01:23 The other aspect there with torque based ECUs is we do need to be very mindful of any torque limit tables because those can override all of the hard work that we're doing with our tuning.
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