E85?!

[FoMoCoSHO]

Just an informative question for us all.

Long term engine life. What is better ? Does it matter ?

Lower Boost and More spark using higher Corn content then you get more fuels in your oil? etc.

Higher Boost and less spark using less corn in your fuel etc.

So many variables....

The safer way of making power? Not sure but I do know I keep my turbos in their happy place, just a couple PSI over stock and the both cars haul a$$. 15 PSI available anywhere anytime with 26-28 degrees just feels sick. No more running out of breath at high RPM, just pulls endlessly well into felony territory. Car doesn't pull timing in the summer because IAT compensations come on line much later (140 IAT2) and probably can be turned off completely with the full corn.

More advance equals higher volumetric efficiency and E85's ability to run at Lambda 1 to higher RPMs and loads increase that further, more bang for less bucks at the pump.

I think corn is a better fuel for the Ecoboost not just for performance but it is markedly cleaner than pump. No sooty tips. I suspect that property may help longevity greatly. I just got pics of my valves and I'm curious to see what happens moving forward. Too bad For Ford cheaped out on the certification and pump. My plan is to use as much corn as possible.

I just changed oil at at 10K interval with 5k of full corn....Oops?

Faint hint of fuel, no change on the stick, and nothing out of the ordinary visually.

Going forward I plan to change every 5K and get some samples analyzed.

Thinking about full E85 and meth after ESP runs out.

Is there a DMR to measure the temperature in the cylinder? Or have you measured EGTs? I am curious at 1 lambda under wot what the temps are? Part of the reason to running rich at load is to help keep things cool as the extra fuel carries away some the heat out of chamber... helping keep the pistons cooler...

I know that Ethanol helps cool things just by virtual of being alcohol... not sure where the offset is?


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I watch cat temps and CHT, the rest seems to be inferred from that number (probably some other things as well). If anything unseemly happens you have limiters in play (unless your tuner disabled them, 1700 IIRC) which will automagically enrich when the max temps are breached.

Spark can have a huge impact on cat temps and we've made spark adjustments that brought cat temps down substantially w/o touching fueling. If things aren't moving fast enough, heat will build. So in this application spark isn't just for making more power. So even though cylinder combustion temps are 200 degreeish colder with full corn, too retarded timing can make temps skyrocket.

 

[ajpturbo]

I’ve also seen an article where high ethanol content and overly rich air fuel ratios cause over cooling of the cylinder and when it’s over cooled there will be less evaporation which leads to wall wetting which will lead to increased emissions

The way it reads is that DI with ethanol acts much differently than ethanol used port injection motors

It’s almost as if DI and ethanol blends were made for eachother lol