[DonWG]

Well! Today was very interesting. I've read that methanol has a very rich burn limit. I just didn't know how far. From the results of the datalogs over the weekend, I decided to have the aux fuel come on and not throttle back the electronic injectors. Just let the injectors run at 85% duty cycle for the whole run and have the constant flow injectors come on at 16 psi. The dang thing ran about the same as it had when I was trying to throttle the injectors back over 50% after 16 psi. This throws a monkey wrench into my fuel strategy. I have to admit, it makes a few things easier now.

The lean spike was still there. Even without trying to throttle the injectors back. This is the conclusion I've come up with for this event. The volume of air that is between the aux fuel solenoid and the orificed nozzles is pushed out of the nozzles after the fuel solenoid has been activated with enough force to affect the air/fuel mixture. Momentarily, instead of injecting fuel, the nozzles are injecting air down the ports. A form of forced induction in itself. What I'm going to try to do to combat this is to reconstruct my fuel map so that I have enough range on the VE table to step up the pw during the window when the aux fuel is activated. How much % I'm going to need is the big question. If I can get the mixture right at this point, it should feel like a mild dose of nitrous right at 16 psi. So the regular nos system will turn off at 16 psi with a fraction of a second of fuel side turn off delay and the aux will turn on at 16 psi with a fraction of a second of increased pw to add to the short time of injected air from the constant flow nozzles. At least now, I won't have to worry about how much to throttle back the electronic injectors.

I feel like I'm building Frankenstein.