olddragger

iTrader: (3)

Please pardon if there is already a discussion on this, but in reference to tuning shouldnt we be using a stoich of approx 14.1 rather than one of 14.68?
I know I am stuck in the a/f mode and not lamba here...........
I know that the o2 sensor will compensate for the dual fuel somewhat, but during other times like WOT, apv transition and such would not this be an important difference to recognize?
Or, possibily--I dont know what the heck I am talking about?

TeamRX8

iTrader: (25)

It's a fact, not a possibility. But you're a nice guy regardless of all the silly stuff you post and the forum wouldn't be the same without you, yeah ...

MazdaManiac

iTrader: (3)

Lol. Legit question, actually.

The stoichiometric lambda for e15 is still 1. The AFR would be 14.1.
If your boosted target lambda is .78, e0 is an AFR of 11.3 but e15 is about 10.9 or so.

But, what that means in the real world is if you are tuning on your wideband for 11.3 at WOT on e15, what you are actually getting is 11.3 because the wideband converts lambda into AFR, not the other way around.

That said, this question has been asked and answered here before.

olddragger

iTrader: (3)

ok -- use lambda, not a/f's Got it.
Wait a minute---you posted E-15?? Is that what yall are seeing. We only have E10.

MazdaManiac

iTrader: (3)

It is supposed to be e10, but it is often as high as e15 (or as low as e7).
It is listed on the pump as e10.