I've been chasing my tail trying to get proper temperature compensation for weather shifts. I'm running a base corvette LS3 with an ECS supercharger on it. Speed Density tune with 2Bar OS using injector data from the manufacturer. I've been messing with the Cylinder Charge Temp biases and that has gotten me nowhere. The injector duty cycle changes appear to be inline with the manifold air temp changes that I'm seeing. But I still seem to be going a 3-5% leaner when it is hot out (80F afternoon vs 60F morning). Looking at my MAF readings it seems that at certain parts of my VE table I am pulling in more air mass at HOT than at COLD given the same RPM and MAP reading. If I back calculate my cylinder air mass based on calculated value and AFR Error, I also come up with more air mass at HOT than COLD. I'm concentrating this on my cruising areas to try to get things dialed in and I'm kind of at a loss right now. Does anybody have any ideas what is going on?
Here is my latest tune with some funny stuff in the Cylinder Charge Temp table to experiment with things. And my two latest log files for the different air temps.
24_05_12_IdlemaxCCT.hpt
ColdCruise.hpl
WarmCruise.hpl