Quote:
Originally Posted by RLami
Or just keep coming across as condescending. Whatever.
That's great that you can tune for specific amounts of Eth with a sensor, but we're talking fixed amounts here. E85 has a fixed (relative) content of alcohol. I wouldn't recommend running it in the winter, as the Alcohol content is reduced for cold start purposes. The key is that you do not *NEED* a sensor. I'm specifically discussing a *PARTIAL* tank of E85 at summer blend ratios of ~83%. The content of 25% E85/75% 91 could be anywhere from 1.75-2.2 gallons on a 10 gallon tank if we account for the Alcohol content falling to 70%. thats 17.5-22% Ethanol content, and while that may seem like a large fluctuation, in the grand scheme of things the lower volatility of E85 still makes it safer than tuning with an also inexact Octane of 91.
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Or make a mountain out of a mole hill.
I see where you are going with it now and at that low of a percentage I really don't think you are getting the real benefits of going through all the trouble of running e85, at best you would be sitting around 93 octane ish plus or minus a couple points, when full e85 is slightly over 100octane. On a turbo platform i could see it working ok, but full e85 is still going to make more, on an na car you would really want to take advantage of running an oxyfuel as much as possible by running a higher percentage.
If we could run a standalone on this car the fuel alcohol sensor would really shine, you can set them up to increase boost, fueling, and timing as the alcohol percentage goes up and that gives you a lot of versatility, it also accounts for cheap or oxy gas because most fuels now have 10% ethanol in them anyway, it lets you extract every last horsepower in the system under all fuel conditions.