combined fuel and λ

So if we use fuel pump and methanol toghether on high boost we want per example to target a 0.85 λ

in the wideband we will see that target, but if we were looking at AFR the target would be the percentage combimation of the

two fuels * 0.85 , correct?

I believe I follow what you're saying, and you're on the right track in your thought, but more importantly the ratio is not going to be fixed if you're using a meth kit, so I suggest sticking with lambda.

Also keep in mind as you increase the amount of meth to gas you may be able to go leaner than on gas, but then have to go richer than gas as the ratio gets even higher.

So if I understand correct, in a staged pump gas + methanol kit we stick we the prefered λ for gas and we only take

advantage of the extra timming we can add we meth and we don't focus very much to calculate a mixed fuel λ????

Thank you in advance.

Perhaps this will make it more clear. If your target lambda on gas only was 0.78 and on methanol only it would be 0.65, when injecting a little meth you may end up targeting 0.8 which is leaner than both individual fuel targets. The relationship of desired lambda target is not a linear relationship between the targets you'd run for the individual fuels.

This requires significant testing to determine what's optimal for each blend, and the blend changes constantly with most basic meth kits because they don't offer precision fuel mass delivery to pace what your fuel injectors are doing.