E15 on the way?

[Sven7]

When we're talking E0 is that also 89 octane or am I forced to buy something higher like 91 or 93 with premium? $0.10 more for a gallon at $3.50 will be a 3% increase in price, so it would mandate a 3% increase in mileage, or 1.2mpg (at 40mpg). Sounds fair. If premium is $0.20 higher it would become iffy.

List of all known ethanol free stations in the US: just click your state and read.
http://pure-gas.org/index.jsp?stateprov=MI

[UFO]

I would think a blender pump would have to rate various blends at different octane levels, since ethanol has a higher octane rating. For lower blends, I doubt an octane correction is feasible, as the stations would have to stock that as well as two tanks.

I've never heard of a blender pump until this thread. It would rock for my track racer, I need high octane, and I could tune it for a specific ethanol blend. E50+ here I come.

[TheEnemy]

Originally Posted by UFO

I would think a blender pump would have to rate various blends at different octane levels, since ethanol has a higher octane rating. For lower blends, I doubt an octane correction is feasible, as the stations would have to stock that as well as two tanks.

I've never heard of a blender pump until this thread. It would rock for my track racer, I need high octane, and I could tune it for a specific ethanol blend. E50+ here I come.

I think 100% ethanol has an octane that is something like 110.

[nemo]

Originally Posted by UFO

I've never heard of a blender pump until this thread.

Sunoco used blender pumps at one time. There were 6 or 7 blends, each having different octane ratings.

[drmiller100]

you have ALL ran e20 before.

the ethanol content is such a joke, and no one can tell anything. the mixers run all sorts of crazy stuff in the gasoline we buy today.

The cars don't car within reason.

I've run e50 in my cars - they run fine, a little less mileage, other then that no big deal.

[serialk11r]

Originally Posted by TheEnemy

I think 100% ethanol has an octane that is something like 110.

I think it depends on delivery. When direct injected strategically to provide maximum cooling effect before ignition, it could be even higher (much much higher), and the efficiency will improve because you are using some of the cooling effect to reduce work required for compression rather than allowing the heat of combustion to provide the necessary heat for evaporation. Done correctly I think I read that you can get better mpg for certain blends despite the lower heat energy in the ethanol fuel.

I believe there is an MIT study where they were able to get the "equivalent" of 150 octane by injecting E85, and supplementing with 87 via port injection.

[payne171]

Originally Posted by serialk11r

I think it depends on delivery. When direct injected strategically to provide maximum cooling effect before ignition, it could be even higher (much much higher), and the efficiency will improve because you are using some of the cooling effect to reduce work required for compression rather than allowing the heat of combustion to provide the necessary heat for evaporation. Done correctly I think I read that you can get better mpg for certain blends despite the lower heat energy in the ethanol fuel.

I believe there is an MIT study where they were able to get the "equivalent" of 150 octane by injecting E85, and supplementing with 87 via port injection.

The form of fuel injection does not raise its octane rating because octane is its chemical resistance to detonation. Direct fuel injection of ethanol is more like mechanical resistance (not sure if I am explaining right so feel free to correct me). However you are completely correct in regards to significance.

Ford built such an engine, a 5.0 v8 if memory serves. They were able to get something like 1200 hp at 45 lbs. of boost (again from questionable memory) on pump gas. Of course, one cylinder of that engine could drive a standard size passenger car easily with a more advanced valve train and the lower friction. This is ethanol's future, as a supplementary fuel in a dual fuel setup. If you want bio fuel for an Otto cycle engine, make butanol.

[roosterk0031]

Pretty sure E85 has ocatane rating of 105.

In this thread I ran multiple blends thru the Stratus.

http://ecomodder.com/forum/showthrea...nol-18896.html

Almost unbelieveable corrilation between energy content and MPG, yes just one 14 yo car but those are the results. When petro hit's $5 in 2 months E85 shouldn't keep up. I'll be running the highest blend Stratus will allow.

My next car is going to be a Cobalt, new HHR's are FFV with the same engine, I doubt there are many different part numbers. But I'll find out for sure once I buy one.

[99metro]

gas station 3 miles from work still sells Sinclair 88 octane pure gas (E0). I think I will stick with that.

[roosterk0031]

Your choice, and I'm all for choice, but I'd rather as much of my dollar stay in this country as I can, and be spent over and over again rather than leaving once.