MicroSquirt.com read only forum (Jan.15,2018)

I know that to convert AFRs you use NewVE=OldVE * currentAFR / NewAFR.

The problem i'm having is that i am using a narrow band sensor and have my WOT bins reading about 0.9v. I'd like it to be more like 0.8v. Rather than just guessing, i was hoping to work out approximately how much i should be changing the bins before i do it. Is there a table somewhere that gives a rough guide of what AFR corrosponds to what NB voltage? I thought there was one in the megamanual but i can't find it.

thanks

andrew

The output of narrowband sensors varies between different manufacturers above and below stoich so I don't think you'll get too many responses to this question. I have seen some tables on the net, but if you're going to tune it properly you'll have to either dyno it and compare the dyno wideband AFR with your datalogged narrowband, or best bet by far is bite the bullet and get a wideband.

Ian.

Yeah i thought that may be the problem.. never mind i'll just have to tune each bin manually and start saving for a wideband!