Well TURBHOE the Cylinder Charge Temperature Model is kind of complex and their "technically" isn't a rock solid sure fire way of tuning it. But unfortunately we don't have access to a more simple table to build an IAT compensation curve. Which some other tuning software and operating systems do have.


The only thing I can really tell you is it's sort of a trial and error deal. I spent a good deal of time logging and making changes to the Cylinder Charge Temp Bias vs Airflow table which you will find under Engine>Airflow>General, you'll see it over to the right. Some time ago when I went to OLSD on my truck for awhile with the wideband hooked up of course I would take logs of my lambda (AFR) error in varying temps and make global (entire table) adjustments until I found a good point where I wasn't getting the large fueling swings with the temperature change. I ended up pretty close as my lambda error ended being within about 3% whether it is 50 degrees out or 90 degrees. Have had good success with my methods on other vehicles as well but every vehicle is different and for that reason their are no magic one set value of numbers that are going to work on every setup.

 

ok, i'll check it out. i use to have the o2's turned on and it would fix its self no problems. but one day out of the blue (i think i switched to a hpt update) it stopped correcting correctly. it started swinging way out of control. so i had to turn them off. i think it may be because one o2 was on the driver bank but the other is in the downpipe. i've thought about putting them both in the downpipe but i'm not sure if it would work. i don't mind it running a touch lean under light loads like it does now, but the light throttle (below 30 on the ve table) chug has to go. when you get under load it swings right to 14.7 like it needs to be. i changed something on the Cylinder Charge bias once, but i can't remember what it was. i'll have to look at the tune.