I've wondered how much fuel system prep would be required to run E85. I know it's huge for methanol, but I guess 85% ethanol isn't so bad? At any rate stoich...
The thing is, I don't have a wideband so I don't know my exact A/F ratio. Around 30% more fuel, the car would start studdering from being too rich so I backed ...
Does the A/D input of the knock sensor get constantly evaluated (I know there is no such thing as constant A/D conversion) to determine knock sum or is there a...
... This is a tough thing to discuss without serious instrumentation. How are you accomplishing this enrichment, with global fuel injector constant or...
Hopefully somebody who understands it better than me will correct this, but it appears to me that the filtering/ADC/threshold stuff is probably on the knock...
I'm pretty sure we've discussed this in the past, that the knock sensor's readings are "gated", as in it only monitors for knock at certain times of the crank...
... and it gets messier... Maft compensation change to account for fuel stoich has got to be very bad in this situation. Increasing maf hz for enrichment...
The knock sensor board does all the filtering itself, and outputs a voltage value to the ECU. The higher the voltage, the more the knock sum is increased that...
OK, so you're saying that the knocksum value can be increased by more than 1 during the sample period? I wonder if that value is the peak seen during the ...
That's why I increased timing to compensate. Right now, I am very very deep in experementation with it. I don't care much to discuss the ideal mixture and ...
... You should definitely see a peak performance gain with E85 because it offers substantially more charge cooling than gasoline. You should be able to run a...
E85 has 20% less energy value than 91 pump at stoich. ... You should definitely see a peak performance gain with E85 because it offers substantially more...
Yes I understand that, but the amount of cooling you get is huge. Maybe the gains I'm thinking of lean more towards non-intercooled setups. -Matt ... ...
I doubt it's THAT much more significant over pump gas. I did vaporization and corrosion tests with E85. Ethanol in it's pure form will vaporize well with less...
The closed loop A/R target is dominated by the narrowband O2 sensor. The sensor switches at 14.7 A/R, from 1 volt to 0 volts, with a steep slope that is not...
It seems you missed the implications of what he was saying. What he was trying to say is that there is no closed loop A/F target value, it's an inherent...
Thanks but theres got to be a target voltage it adjusts for. I'm wondering if anyone knows where in the code thats at.As in address wise,maybe its a...
It doesn't matter what the target voltage it adjusts for is, because the narrowband O2 sensor is effectively a binary device, you either get 1 volt (rich) or 0...
As an aside that I forgot to include: My Wideband O2 controller (Techedge) has an optional output that mimicks a "narrowband" O2 sensor output. You can program...
I guess what I am trying to point out is, that E85 won't have the performance of racegas of the same octane, unleaded 100. More than 91, MAYBE, but I will ...
My guess would be some kind of accumulated max, or something? I have no idea how the knock board itself works though, only that the ECU code expects a voltage...
I live in brazil, and I see turbocharged ethanol cars everyday E85 I don't know but straigh ethanol will make more power, 20-30% more. It really have less...
Well,if it swithes around .5 volt,which is suppose to be 14.7-I KNOW ITS NOT EXACT-,then right there is the target,.5 volts. So if the over/under volt number...
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