Now that I'm looking more into the programming side I understand what you were saying. Detroits don't truly run speed density, there's no temperature compensation for the intake air. So if you wanted to target a specific AFR you will be always richer when it's hotter and leaner when it's cooler. Not a huge deal on a diesel, but when you're trying to max out BSFC all across the range it doesn't work so well. Also I have to find a way to run absolute
MAP for VNT control instead of relative. I think tricking the
BARO sensor (not
map sensor) to be 0 might work. There's no VE
map either like many speed density systems so any change in engine breathing efficiency and you have to write an entire new program.