F30POST
F30POST
2012-2015 BMW 3-Series and 4-Series Forum
BMW Garage BMW Meets Register Today's Posts
BMW 3-Series and 4-Series Forum (F30 / F32) | F30POST > Technical Forums > B58 Turbo Engine / Drivetrain / Exhaust Modifications > methanol vs ethanol
Extreme Powerhouse
Post Reply
 
Thread Tools Search this Thread
      11-09-2019, 09:27 AM   #1
jackstrath
Major
Scotland
659
Rep
1,239
Posts

Drives: 16' F31 340i & 03' Focus RS
Join Date: Aug 2014
Location: Aberdeen

iTrader: (0)

methanol vs ethanol

So this might of been answered before but googling it i cant find much about it ?

Im only spitting this out there to see if anyone has some facts.

methanol vs ethanol in the tank.

We all know that you put ethanol in the tank to make the fuel E30 blends ect, can you do the same with methanol ?

Its like why do we inject methanol with a WMI kit, why dont me inject ethanol ?

If its down to cost its the same with making E30 Blends?

I know drag cars can run 100% meth, why not ethanol?

Just interested if anyone has any logic or facts behind this?
Appreciate 0
      11-09-2019, 02:33 PM   #2
kern417
Cheapskate
4447
Rep
4,993
Posts

Drives: 2018 440i |2016 340i | 2010 X5
Join Date: Aug 2016
Location: Cincinnati

iTrader: (1)

going from gas to ethanol is the same as going from ethanol to methanol.

methanol has a higher octane rating than ethanol
you need a lot more methanol to maintain safe afrs.

E85 is more readily available and easy to pump into the tank, while meth needs to be purchased/stored separately.

spraying ethanol will have similar effects to meth, but won't raise your octane rating as much as methanol and won't have as much of the same cooling effects.

Most of the methanol race cars you see have multiple large injectors for each cylinder and multiple large fuel pumps to keep the engine happy. But your gas mileage would go to complete crap. It's just not practical for a street driven car.

For reference:

Gas stoich is 14.7:1
E85 stoich is 9.8:1 (+33%)
Meth stoich is 4:1 (+72%)

Gas octane: 93
E85 octane: 105
Meth octane: 110
__________________
Quote:
Originally Posted by umizoomi View Post
As long as 3-pedals are an option, I will exercise my right to suffer the handicap and indignity of slower shifts and reaction times.
Youtube/Instagram/TikTok: @kern417
Appreciate 0
      11-09-2019, 11:21 PM   #3
jackstrath
Major
Scotland
659
Rep
1,239
Posts

Drives: 16' F31 340i & 03' Focus RS
Join Date: Aug 2014
Location: Aberdeen

iTrader: (0)

i did wonder if it was the ease of getting EXX fuel, we in the uk dont sadly have that luxury! And from what i remember ethanol is more expensive/not as readily available
Appreciate 0
Post Reply

Bookmarks


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 09:35 AM.




f30post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, 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