Could someone please explain ethanol please

Lawton438 · 04-12-2014, 09:08 AM

As above, what are the pro's and con's?

Thanks

Mike@N54Tuning.com · 04-12-2014, 10:14 AM

Quote:

Originally Posted by Lawton438

As above, what are the pro's and con's?

Thanks

With a proper tune higher mixes of ethanol give you more power but worse gas mileage.

DO NOT USE HIGH ETHANOL ON A CAR NOT TUNED FOR IT.

Mike

Ingeniator · 04-12-2014, 10:44 AM

Alcohol fuels have a high AKI of almost 100. So you can tune a lot more aggressively without getting knock. Exhaust gas temperatures tend to be lower which improves efficiency on turbo motors. However it takes almost twice as much methanol and about 2/3 the ethanol to make the same power as gasoline . You want to balance the AK properties with the energy concentration in gasoline. That appears to be E50-60 on this platform at the moment. Once we have unlimited fuelling a 100% alcohol motor would be possible.

V8bait · 04-12-2014, 11:52 AM

Quote:

Originally Posted by Mike@N54Tuning.com

With a proper tune higher mixes of ethanol give you more power but worse gas mileage.

DO NOT USE HIGH ETHANOL ON A CAR NOT TUNED FOR IT.

Mike

That's beautifully summed up

04-12-2014, 09:08 AM	#1
Lawton438 First Lieutenant 45 Rep 393 Posts Drives: 335i Join Date: Apr 2013 Location: Stoke on trent iTrader: (2)	Could someone please explain ethanol please As above, what are the pro's and con's? Thanks
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04-12-2014, 10:44 AM	#3
Ingeniator Major 34 Rep 1,093 Posts Drives: 07 335XI(90) 09 135I(82) Join Date: Nov 2013 Location: Fort Mac, Alberta iTrader: (1)	Alcohol fuels have a high AKI of almost 100. So you can tune a lot more aggressively without getting knock. Exhaust gas temperatures tend to be lower which improves efficiency on turbo motors. However it takes almost twice as much methanol and about 2/3 the ethanol to make the same power as gasoline . You want to balance the AK properties with the energy concentration in gasoline. That appears to be E50-60 on this platform at the moment. Once we have unlimited fuelling a 100% alcohol motor would be possible. __________________ 07 335XI (A008006) 6AT ~94K miles JB4 G5 ISO VSRF DP's 09 135I M (VK80379) 6MT. Race Project car. 1) Install Cobb/piggyback? and Motiv 600 Kit[HTA3076R w/ tial .82] 2) JRZ or Moton suspension. 3) Build high flow intake manifold with multi-port fuel and relocate OFH 4) Build full cage 5) Complete staged twin setup with HTA4205R [w/Tial 1.16] 6) Complete dry sump system
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