BMW 1 Series Coupe Forum / 1 Series Convertible Forum (1M / tii / 135i / 128i / Coupe / Cabrio / Hatchback) (BMW E82 E88 128i 130i 135i)
 





 

Post Reply
 
Thread Tools Search this Thread
      05-29-2019, 01:45 AM   #1
xshadowspy
New Member
United_States
6
Rep
20
Posts

Drives: Black bmw 128i
Join Date: May 2016
Location: California

iTrader: (0)

can you run e85 off the bat?

hey guys I'm get the AA tune coming up next month I was wondering about running e85 I heard AA has it just have to ask. But was wondering has anyone else ran e85 did you guys have to upgrade anything or just need a tune for it I have the N51 engine by the way if that makes any difference.
Appreciate 0
      05-29-2019, 07:45 AM   #2
N54Yankee
Captain
N54Yankee's Avatar
United_States
870
Rep
655
Posts

Drives: N54 135|Cobb|M3 control arms
Join Date: Sep 2018
Location: USA

iTrader: (0)

You will lose power. Alcohol produces less energy then gasoline. Unless you have very high compression engine and or forced induction with high boost you will be slower and you will also lose mileage per tankful. Lose, lose.
__________________
__________________
"If violent crime is to be curbed, it is only the intended victim who can do it. The felon does not fear the police, and he fears neither judge or jury. Therefore what he must be taught to fear is his victim." - LtCol Jeff Cooper
Appreciate 1
Rmtt639.50

      05-29-2019, 03:43 PM   #3
xshadowspy
New Member
United_States
6
Rep
20
Posts

Drives: Black bmw 128i
Join Date: May 2016
Location: California

iTrader: (0)

Quote:
Originally Posted by N54Yankee View Post
You will lose power. Alcohol produces less energy then gasoline. Unless you have very high compression engine and or forced induction with high boost you will be slower and you will also lose mileage per tankful. Lose, lose.
Ah I see so there would be no benefit for the N51 engine especially because it has lower compression. I've only seen videos of e85 on the N52 they gain about 12whp from it
Appreciate 0
      05-29-2019, 04:07 PM   #4
N54Yankee
Captain
N54Yankee's Avatar
United_States
870
Rep
655
Posts

Drives: N54 135|Cobb|M3 control arms
Join Date: Sep 2018
Location: USA

iTrader: (0)

Quote:
Originally Posted by xshadowspy View Post
Ah I see so there would be no benefit for the N51 engine especially because it has lower compression. I've only seen videos of e85 on the N52 they gain about 12whp from it
Some people might SAY they get 12 hp on the N52 by simply going E85 but they’re not. Not unless they dramatically raised compression by changing pistons or adding a blower to bump power with e85.
There are better ways to make power with the N51 but not cheap as a simple fuel change. HP usually doesn’t come that easy. Do a search, there are lots of guys here who raised hp, tq nicely on the 51.
__________________
__________________
"If violent crime is to be curbed, it is only the intended victim who can do it. The felon does not fear the police, and he fears neither judge or jury. Therefore what he must be taught to fear is his victim." - LtCol Jeff Cooper
Appreciate 0
      05-29-2019, 06:08 PM   #5
The Wind Breezes
Lieutenant Colonel
The Wind Breezes's Avatar
722
Rep
1,702
Posts

Drives: 135i N55 DCT
Join Date: Apr 2015
Location: USA

iTrader: (0)

Quote:
Originally Posted by N54Yankee View Post
You will lose power. Alcohol produces less energy then gasoline. Unless you have very high compression engine and or forced induction with high boost you will be slower and you will also lose mileage per tankful. Lose, lose.
Well, he may lose power untuned but not for that reason.

Alcohol has oxygen in it so you can stuff MORE of it into the cylinder with a given amount of air than gas. This means you can make a bigger bang, even with the lower amount of energy. Put another way, the difference in air needed to combust is a little greater than the energy difference between gasoline and alcohol. Same with E85.

So, properly mixed and tuned, in a given engine you can make a little more power with alcohol or E85 than gas. It has nothing to do with high compression or forced induction although alcohol / E85 has ADDITIONAL advantages over pump gas in those situations (cooling, detonation resistance).

BUT, if you're looking to go to the trouble of getting E85 and tuning your car for it, you definitely picked the wrong car. N55 135i are not any more expensive to buy than a 128i and the maintenance costs / part failures are the same. And a N55 can turn the power up a LOT over stock, even on pump gas.
Appreciate 0
      05-29-2019, 07:54 PM   #6
N54Yankee
Captain
N54Yankee's Avatar
United_States
870
Rep
655
Posts

Drives: N54 135|Cobb|M3 control arms
Join Date: Sep 2018
Location: USA

iTrader: (0)

https://itstillruns.com/power-differ...-12196474.html
__________________
__________________
"If violent crime is to be curbed, it is only the intended victim who can do it. The felon does not fear the police, and he fears neither judge or jury. Therefore what he must be taught to fear is his victim." - LtCol Jeff Cooper
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 06:54 PM.




1addicts
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST