2020 Mustang GT - twin turbo - Desired load - how to raise

[Justinjor]

Been working on this 2020 Mustang GT twin turbo car. Made right around 740whp on my dyno on 8psi. Runs pretty strong.

After doing a lot of research on this forum, it seems I've got some glaring issues to address.

Where does "desired load" come from in the file? I thought I had load calculations done up to 2.00 load but apparently it's not calculating above 1.1-1.2?

The maf is registering 1.6 on the air load but according to the log, only 1.16 is desired.

What gives

desiredload.jpg

[LastPlace]

What’s your driver demand request?

[Justinjor]

What?s your driver demand request?

Which PID? I don't have a 'driver demand request' pid. Got a bunch of others though.

That's what is a little daunting on stuff like this - trying to determine where the stock computer derives certain information from so the tuner can accurately model everything correctly.

For example, here's my driver demand desired torque table.

At 6400 I should be requesting around 960 ft lbs but none of the related pids are even close to that - why?

where does Engine Brake Torque come from?
Scheduled Torque?
Engine Indicated Torque Reference?
ETC Torque request?

I did figure out that the MAXIMUM LOAD mapped points under Speed Density where set to stock values. I set them all to 3.0 which (I assume) will allow the calcuation of greater than the 1.1 load. Sure enough, next log DESIRED LOAD was up to 1.7 which tells me I'm on the right track.

driverdemandtorque.jpg
driverdemandLOG.jpg

[LastPlace]

What are these two tables doing to your "driver demand" request?

Screenshot (27).png

[LastPlace]

It all starts with a torque request, then converts that to an airflow request (think throttle open) and then bases all of the other calculations on your Speed density/torque to load models

[Justinjor]

What are these two tables doing to your "driver demand" request?

Screenshot (27).png

driverdemand2.jpg

[LastPlace]

Doesn't look like those are reducing your driver demand at WOT.

You need to work on your Torque to load tables.

[Justinjor]

Doesn't look like those are reducing your driver demand at WOT.

You need to work on your Torque to load tables.

Meaning the actual torque model itself? Engine Torque and Inverse?

[LastPlace]

Yes

[Justinjor]

Yes

Are there best practices to accurately attack that? I have a dynojet in the shop that I used for the WOT tuning part.

I'd like to maybe set up a histogram and do some street driving and log the % error and apply the change accordingly, rinse and repeat.

[LastPlace]

That’s where the fun part starts the coyote cookbook describes the process just remember torque at the tire and torque from the engine will be different

[Justinjor]

That’s where the fun part starts the coyote cookbook describes the process just remember torque at the tire and torque from the engine will be different

As I understand it, the coyote cookbook leaves a lot to be desired. Granted I've never read it, but thats what I've heard on these forums.

Everything I know I've learned from first reading and understanding Greg Banish's books, and then trial and error with the copperhead pcm, and now the bosch. Good fun

[LastPlace]

It absolutely does and hopefully Greg will release his coyote training soon