[ksalih]

http://www.youtube.com/watch?v=HuOs1yap8mU&feature=youtube_gdata_player

interesting

[ksalih]

bump

[Lankster]

Why would you bump this just 3 hours later

[ErvGotti]

Fixed

[jayzF30]

100% E85 I'd love to try

[plague]

wow. excellent video to show us. absolutely supports the use of e85. thank you!

[RoundelM3]

The engines are not harmed, but the fuel systems of non-flex-fuel vehicles can be affected if not equipped with a flex-fuel conversion kit - read the text under the video. This is a Chevrolet Tahoe, not a BMW. Aside from the octane boost, you get nearly 30% lower fuel mileage with E85, and it's not that much cheaper than the E10-E15 "normal" gasoline. I'll wait for someone else to do a long-term experiment with THEIR BMW. I don't think I've even seen E85 for sale here in Central TX anyway.

[ksalih]

Originally Posted by roundel335

The engines are not harmed, but the fuel systems of non-flex-fuel vehicles can be affected if not equipped with a flex-fuel conversion kit - read the text under the video. This is a Chevrolet Tahoe, not a BMW. Aside from the octane boost, you get nearly 30% lower fuel mileage with E85, and it's not that much cheaper than the E10-E15 "normal" gasoline. I'll wait for someone else to do a long-term experiment with THEIR BMW. I don't think I've even seen E85 for sale here in Central TX anyway.

I recall it talking about the fuel lines not showing deterioration. Yes this wasn't a BMW, but it was a non flex fuel vehicle. I think this video gives more reason to believe e85 isn't as harmful to a non flex fuel vehicle, that being a BMW as well.

[rismo]

One thing that has been confirmed by Siemens is that our injectors are affected. Siemens states that if you run ethanol and the injector is heated above 100 degrees celcius the internal filters in the injector will get clogged.

Im pretty sure our great gas pumps will not really appreciate it either.

But e85 and N54 + proper tune = Winning! Almost tiger blood for our cars...
Like white salt for Charlie Sheen...

[A418t81]

Originally Posted by rismo123

One thing that has been confirmed by Siemens is that our injectors are affected. Siemens states that if you run ethanol and the injector is heated above 100 degrees celcius the internal filters in the injector will get clogged.

Im pretty sure our great gas pumps will not really appreciate it either.

But e85 and N54 + proper tune = Winning! Almost tiger blood for our cars...
Like white salt for Charlie Sheen...

Another thing you can do is run a full tank of pump gas through the car every so often. On port injection motors, there is a sticky/clear substance that accumulates on the injector tips after running E85 exclusively for a long time (like a year.) Running regular pump gas through there has more of a solvent effect and washes those deposits away. I run a full tank of 93 through the GTR about every 3-4 months and it goes through probably 2 tanks of E85 a month.

[TigOn.]

Good Vid, thanks!

[Broadsword]

Originally Posted by roundel335

I don't think I've even seen E85 for sale here in Central TX anyway.

Seen it in Killeen...

[RoundelM3]

But wait...haven't we been told all our lives "don't mix alcohol with gasoline"?

[benzy89]

Originally Posted by rismo123

One thing that has been confirmed by Siemens is that our injectors are affected. Siemens states that if you run ethanol and the injector is heated above 100 degrees celcius the internal filters in the injector will get clogged.

Im pretty sure our great gas pumps will not really appreciate it either.

But e85 and N54 + proper tune = Winning! Almost tiger blood for our cars...
Like white salt for Charlie Sheen...

E85 burns cooler than petroleum based gasoline (whether it's pump or race gas octanes), so E85 won't "melt" the injectors. The problem with N54's is that there really not any aftermarket fueling options (specifically larger injectors & higher flow fuel pumps). E85 doesn't have the same flow patterns as pump gas & requires a higher quantity of fuel to flow than regular gas. EVO owners have been running E85 and never had any problems, but this is because they have options to address this issues (larger injectors, race spec fuel pump) -- So until these things become available, we're stuck running 50/50 blends to maintain the necessary flow quantity

Originally Posted by A418t81

Another thing you can do is run a full tank of pump gas through the car every so often. On port injection motors, there is a sticky/clear substance that accumulates on the injector tips after running E85 exclusively for a long time (like a year.) Running regular pump gas through there has more of a solvent effect and washes those deposits away. I run a full tank of 93 through the GTR about every 3-4 months and it goes through probably 2 tanks of E85 a month.

We're direct injection motors & like I mentioned above, because we cannot run straight E85 as of right now (unlike EVOs or your GTR), we don't have to worry about this. I've also never heard of E85 clogging injectors since E85 runs cleaner than pump gas.


Here's a thread posted by some guy who's run straight E85 for 3 years, comparing the parts that have seen ~50k miles of E85 usage compared to brand new OEM's
http://evoempire.org/community/index...-years-on-e85/

You'll see everything looks basically new. I know that this does not directly translate over to BMW/N54 usage, but it's a very good sign that E85 will not damage anything

[A418t81]

Originally Posted by benzy89

We're direct injection motors & like I mentioned above, because we cannot run straight E85 as of right now (unlike EVOs or your GTR), we don't have to worry about this. I've also never heard of E85 clogging injectors since E85 runs cleaner than pump gas.


Here's a thread posted by some guy who's run straight E85 for 3 years, comparing the parts that have seen ~50k miles of E85 usage compared to brand new OEM's
http://evoempire.org/community/index...-years-on-e85/

You'll see everything looks basically new. I know that this does not directly translate over to BMW/N54 usage, but it's a very good sign that E85 will not damage anything

I'm very aware of the fact that the N54 is a DI motor, which is why I specifically talked about PORT injected motors. I'm not a noob, nor an idiot, and I've tuned numerous platforms on pump gas and E85 so cool your jets. The fact that the accumulation was on the tips of those injectors is irrelevant. The sticky clear residue shows up whenever E85 evaporates. That happens in the DI injectors and is what could theoretically lead to the micro filter clogs. Like I said, running a tank of pump gas every now and then is a good idea, and generally accepted in the Evo and GTR worlds who run 100% straight E85 and have so for years. It dissolves any of this residue as well as provides additional lubricity to the fueling system which the E85 washes away.

[kevino002]

Originally Posted by roundel335

Aside from the octane boost, you get nearly 30% lower fuel mileage with E85, and it's not that much cheaper than the E10-E15 "normal" gasoline.

Do you have any evidence to back this 30% lower fuel mileage up? I have been running straight E85 for years (not a BMW) and see maybe, MAYBE a 10% loss in MPG.

[benzy89]

Originally Posted by A418t81

I'm very aware of the fact that the N54 is a DI motor, which is why I specifically talked about PORT injected motors. I'm not a noob, nor an idiot, and I've tuned numerous platforms on pump gas and E85 so cool your jets. The fact that the accumulation was on the tips of those injectors is irrelevant. The sticky clear residue shows up whenever E85 evaporates. That happens in the DI injectors and is what could theoretically lead to the micro filter clogs. Like I said, running a tank of pump gas every now and then is a good idea, and generally accepted in the Evo and GTR worlds who run 100% straight E85 and have so for years. It dissolves any of this residue as well as provides additional lubricity to the fueling system which the E85 washes away.

This is for you

[akotten]

Originally Posted by kevino002

Do you have any evidence to back this 30% lower fuel mileage up? I have been running straight E85 for years (not a BMW) and see maybe, MAYBE a 10% loss in MPG.

It's genearlly based on the fact that E85 requires the base fuel table to be richened by 30-35% in order to run at 1.0 Lamda (Stoich).

[RoundelM3]

Originally Posted by kevino002

Do you have any evidence to back this 30% lower fuel mileage up? I have been running straight E85 for years (not a BMW) and see maybe, MAYBE a 10% loss in MPG.

It's widely publicized that E85 will lower your miles per gallon, up to as much as 30% if you run straight E85. Mixing it 50-50 might cut that to 15%. Also, as previously mentioned, ethanol has less BTU energy than gasoline, so while it's knock resistance (octane level) is higher, its thermal efficiency is not. Same thing with diesel fuel - that's why diesels get so much better mileage than gasoline engines.

[brusk]

That video is kind of misleading. An older SBC isn't a very good test as that thing can run on about anything. That engine has no throttle response, underpowered and typically already runs pretty rich. Try that same thing on some of the 4 cylinders that are already twitchy, run overly lean stock or have smaller injectors that already run high duty cycles and see how long that lasts. Unless your grandpa that never pushes the throttle more than 30% where the engine runs in closed loop fueling 99% of the time you should have a fuel computer or proper tune to run the proper mixtures.

[BMWsky]

I was averaging 22.4 mpg on 93oct fuel. I'm now running a 50/50 mix of E85 and 93oct and my mileage is 20.8 mpg which is roughly a 7.1% drop.

[turb0mik3]

I have a station down the street that sells e85 and 100oct. I wonder what these number gains would be?!?!?! I shall try.