Quote:
Originally Posted by jamesm
i use custom maps with a total fuel volume compensation for e85/flexfuel
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Ahh, gotcha.. i forget your using EcuTek. So yeah, lots of different tools and ways to go about scaling.
In my case i wanted to align the fuel map requested afr with the actual afr across the entire range of load and rpm without altering the calculated load (MAF scale) very much. I recently changed my intake setup and it drastically changed the load values and as a result threw my tune way off from where it was the last time i dyno tuned it. Plus i was not happy with how lumpy my fuel map was looking (as a result of the factory MP comp table).
I think if i were doing my own forced induction setup, I would just do course DI scaling changes then port scaling changes to get the trims dialed in tight, then do the maf scale in port only mode if needed, then do injectors and redo the injector scale and touch up maf scale then do the maf housing.
Of course most of the time if your tuning for someone else you don't have that luxury and just have to get it done quick and dirty. I think i would still force open loop and use afr error since that gives you one value you can use across the entire load and rpm range regardless of if you are working on maf scaling or injector scaling or both.
I'll hit you up for your notes when i finally decide what route to go for boost lol. I have not gotten into boosted tuning yet on this platform so your method may work better there.