Fueling Trackhawk/Hellcat

[HanJ]

Hello,

After reading a lot and trying some things I'm a bit stuck now. For now I see that the Trackhawk/Hellcat usually runs at lambda 1. When WOT is detected the value of FAR in the power enrichment table is added to stoich. But at a certain moment the mixture gets even more rich. Initially I thought this was due cat heat protection but when reduced/disabled the mixture remains the same. Can someone shine some light on this? In the logging the lambda commended goes from 1 to 0.87 when WOT is detected and goes then to 0.77. It is the last that I so far could influence.
In the forum I could not find much more then switch off NN and tune VE table but this not recommended and seems that the VE table is neglected when NN is switched on again.

best regards, Han

first tune.hplScreenshot 2022-04-28 141216.png

[white1]

Can you post your tune file as well. Have you adjusted commanded PE?

[HanJ]

v-919-rt tune.hpt

Sure, is attached. In the stock tune the same occurs. Just checked the file, think I made a typo in the CAT temp protection table. It is now 0.05 intended was 0.005. Have to try again...

[white1]

v-919-rt tune PE change1.hpt

I didnt go through the entire tune, but see if this helps your issue

[HanJ]

v-919-rt tune PE change1.hpt

I didnt go through the entire tune, but see if this helps your issue

Thanks, I will test it tomorrow.

[HanJ]

Thanks, it works, lambda is now stable and no second step. Have to figure out which one the changes takes care of this but tested for almost one week with consistent result.Screenshot 2022-05-06 103945.png

[white1]

Glad that worked for you.

[JoshCP527]

It was indeed the cot/eot protection. There are two forms of disabling it. Maxing temps out this is targets, thresholds, and delta temps keeps it from triggering and keeping anything else that it might trigger. Or zeroing out all the temp fuel adder maps still allowing it to trigger with no added fuel.