Quote:
Originally Posted by ztan
I run 0% up to 0.3 load and 70% at 0.4. Full DI at low load for me stops a bit of erratic behaviour when AC cuts in and out. I also have bigger port injectors which have a larger non-linear region than stock which accentuates the split fuelling problems at low pulsewidths.
I do see quite wide variations in AFR trims at idle speeds but not at low load whilst cruising - there is a lot of intake temp variation under the hood when the car is not moving and I largely ignore these now.
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Same here, but the change in AFR and fuel trims due to IAT change is predictable and not quite as drastic for me while running 0% Pi up to .30 load. At most my LTFT will go up to +4% previously, but after changing the table to the one I posted above it will go up to as much at 8~9% varying from 0%~9% at idle speeds depending on load and temps. I think the more Pi you run, then more LTFT will vary due to IAT change versus DI.
I'm going to scale my MAF as close to 68* as I can the entire range in 100% DI then take it from there. Good thing it's getting colder in socal, so I shouldn't have too much trouble doing this.