Ford torque based tuning without a dyno?

I'm currently going through the Ford Torque Based (2014 Raptor) video.

Andre mentioned that accurate numbers for the torque tables are necessary to avoid major problems.

How would someone go about this with no chassis dyno accessible?

For example, I own a 2011 Mustang 5.0 GT that is now twin turbo. I will need to retune it (the ecu is locked, handheld SCT stolen, will need a factory reset) and I don't have access to a dyno.

Is this even possible?

I am also interested in some in depth info on torque tables as well. My 5.0 F150 is pretty much stock but i'm getting a slight IPC wheel torque error at idle in gear, and sometimes it stalls. I've attached a screenshot of my data log when this happens.

Unfortunately tuning these on the road is all but impossible to properly tune these late model torque based ECUs without the use of a dyno.

@Bronson - I'm sorry I can't provide a solution based on that screen shot. If the engine configuration is close to stock then I'd revert your calibration to stock and then modify it to suit.

OK. It's not a huge issue and it was doing this before with the stock calibration. I'm having other issues with the truck as well, it could just be a tired engine, 150k miles. Thank you for the info.

Andre

So would it be possible, since the car is previously tuned and still running on that tune, to take it to a dyno, run it through all the throttle positions and datalog it, taking notes of the torque throughout, then reflash it to stock, plug those numbers in again to get it back on the road, then rent a dyno again for fine tuning?