The reason the combustion temperature will be kept down is a bad thing though. The ethanol has a lesser amount of latent energy compared to gasoline.no, if your wideband setup is configured for stoich gasoline. tune for 14.7 if its setup for ethanol then the afrs will change. E10's stoich is 14.13 afr if your wideband is setup for ethanol. tune for 14.7-15s for idle and cruising. and high 12s mid 13s for wot.
that fuel will help your build. ethanols latent heat properties will help keep the temp of the combustion down along with the air intake charge.
for high compression this is good. you could also get a lower temp thermostat to keep the engine cooler. you can make more power on an engine that is overall more cooler than one that runs hotter.
15-low 16s are fine for idle if you can get it to idle correctly. just talk to your tuner. cruising id go for low 15 mid 14's and any load or wot i would go for low 13's. all depends on what you have in your setup.The reason the combustion temperature will be kept down is a bad thing though. The ethanol has a lesser amount of latent energy compared to gasoline.
If gasoline stoich is 14.7 and ethanol stoich is 14.13 and you have up to 10% ethanol blended gasoline wouldn't you want to tune for slighty lower than 14.7? More like 14.6 to accomodate for the ethanol? Or do you want to run a little leaner during idle and cruising?
Also why so low for wot? Just for safety's sake or do you have a different reason?
What is the stock setting for the sytem to go into open loop and what is a good throttle position setting when tuned to go into open loop? What considerations do you have to make when choosing the throttle position % when changing over to open loop?
I don't believe the ethanol blend would actually cool the intake charge. It would just be a cooler combustion. Which would aid in keeping the engine cooler but would not produce as powerful an explosion as straight 94 octane gasoline.15-low 16s are fine for idle if you can get it to idle correctly. just talk to your tuner. cruising id go for low 15 mid 14's and any load or wot i would go for low 13's. all depends on what you have in your setup.
if the pistons are domed. the chance of detonating is higher than that of a less domed or flat top piston. the quench becomes significantly smaller on a domed piston setup.
it depends on how the wideband is setup. if its setup for gasoline and ur using ethanol you still tune for the 14.7AFR.
also the latent heat thing is a good idea because it cools down the air charge thus making air intake denser, so more air per volume = more power to be had. also cooler air charge has an even less chance of detonating than it being hotter.
low as in what? 12-13's are fine for NA, too lean and itl get too hot. the ecu does not compensate at wot. it uses the predefined parameters of fuel and ignition. the O2 sensor is not used at WOT.
rich is a good and bad thing. too rich you cant make the power, mpgs suck, you wash your cylinders and fouls up shit. just a tad bit rich is ok as it keeps the combustion cooler, its there to prevent a knock.