I'm out of fuel, I could not richen the AFR enough for e85 timing to be taken kindly. A little backwards, but the corn allowed enough of a safety factor for there to not be any knock events. Missing about 8% fuel, on my already maxed (and then some ) 740's. Single Walbro 485 fuel pump. Once my polar rails finally come in (trying my best to wait patienty), I'll go full e85 and go for gold as far as my stock internals allow.