E85 fuel in a bmw – page 3 gas monkey monster truck driver

##

"17:1 afr" = quite lean… This seems to be the missing info which explains somewhat better mpg, (at least vs the same "aggressive" tune w/ 91 octane gas.) This is quite a bit leaner than 14.7:1 / stoichiometric. I drive a much heavier 330ci convertible w/ a slushbox, (300lbs heavier than your stick sedan?) and even when I’m getting a pathetic 18mpg in city driving here in Chicago, I usually get 280-290mi out of a tank. Since Chicago has just about the worst gasoline prices in the nation, and a ludicrous spread between 87 / 93octane, (91 is rare here, not much cheaper,) I’d love to give an E85 tune a try if all that’s required is a flash and a $50-$100 set of used injectors. "Premium" fuel in the city proper is $4.50+/gal, barely makes it under $4/gal in the far suburbs or over the Indiana border, and where it’s available, E85 is up to 20-30% cheaper per gallon. If I’m saving 20-30% on fuel, taking only a 10-20% hit on consumption, with the same or greater power, that’s a win in my book. (While making Ethanol from corn may not be wise in many respects, I’m in dire need of more $ in MY pocket right about now.) E36 HateR, Care to share which tune you’re using?

TI think you need to do a little more reading up on ethanol to be questioning anyone’s support for ethanol. Ethanol runs cleaner, it’s cheaper, you can produce it yourself. Corn is least efficient for ethanol production. An acre of corn produces about 250 gallons of ethanol as compared to an acre of cattails which can produce 2500 gallons. There are a ton of different waste products ethanol can be made from, not to mention algae, beets, basically anything with sugar or starch. It runs cleaner, runs cooler, and your parts will last longer. When you first start using it you might have to change the oil a little more often because it’s cleaning all the gunk and build up from regular gas. Down the line you won’t have to change as often. There is no need to change any lines or any other adjustments if you go 50% or less.. To run full E85 it’s only adjustment to computer that needs to be done. They sell these kits and not complicated at all.. Alcoholcanbeagas.com

I run 50% 85 octane and 50% E85 in my 2003 BMW Z4, which would be like running 98 octane. I’m not telling anyone to do this but it’s my choice.. High compression is good for ethanol but I’m not looking to make major changes . I will be producing my own ethanol soon, and at $1.50 a gallon you tell me if it’s worth it.. Anything less than the $4.10 for premium 93 right now per gallon helps… I don’t drive like a maniac so I’m not worried about a 10% loss in fuel economy, if in the long run I’m paying less per gallon, and keeping the money out of the hands of big oil…

Alright my friends, there are tons to be said so I will keep this simple. I am tuner in Fresno, CA and for the past 7 months I have been trying to tune for E85 on my 1999 328iS. Only thing done to it at the time was a homemade intake and an M50 Manifold Swap. I ran E85 BEFORE tuning and AFTER tuning. The car was running like crap because the smaller 21.5 lb. injectors were overcompensating and the car was running rich for both instances. With or without the tune, there was NO CHANGE on E85. On a Spark Advance tune for gasoline, I changed the pink top 21.5 lb. injectors to the 24 lb. light blue top injectors while constantly on E85. Just as the gentleman previously said on this thread, the change was instant and there was NO TUNE REQUIRED. I found this to be the case with a larger 3.5" MAS as well. No tuning required. I do not how this is possible but I am also getting better gas mileage with E85. I am not sure what the case would be if there was not a Spark Advance tune but bigger injectors while on E85, but I am sure it would still work. Lesson of this story is, don’t regurgitate dictionary nonsense and act like a genius when you haven’t tried something. Experience is the most valuable thing in life.

Alright my friends, there are tons to be said so I will keep this simple. I am tuner in Fresno, CA and for the past 7 months I have been trying to tune for E85 on my 1999 328iS. Only thing done to it at the time was a homemade intake and an M50 Manifold Swap. I ran E85 BEFORE tuning and AFTER tuning. The car was running like crap because the smaller 21.5 lb. injectors were overcompensating and the car was running rich for both instances. With or without the tune, there was NO CHANGE on E85. On a Spark Advance tune for gasoline, I changed the pink top 21.5 lb. injectors to the 24 lb. light blue top injectors while constantly on E85. Just as the gentleman previously said on this thread, the change was instant and there was NO TUNE REQUIRED. I found this to be the case with a larger 3.5" MAS as well. No tuning required. I do not how this is possible but I am also getting better gas mileage with E85. I am not sure what the case would be if there was not a Spark Advance tune but bigger injectors while on E85, but I am sure it would still work. Lesson of this story is, don’t regurgitate dictionary nonsense and act like a genius when you haven’t tried something. Experience is the most valuable thing in life.Spoken very much like an inexperienced non-tuner. Your contradicting statements show you know nothing about the subject discussed.