They changed the way of measuring octane rating. Ethyl alcohol was 100 under the old system. Probably a higher number under the new system. Optimum compression is just before it detonates. Race cars ran 13.5 to 1 with alcohol. The more you put your foot in something the hotter it gets. If racers ran 13.5 to 1 grandma could probably run a but higher. Fuel efficiency is directly proportional to compression ratio.
Kirk -----Original Message----- From: MH [mailto:[EMAIL PROTECTED] Sent: Wednesday, May 01, 2002 1:34 PM To: biofuel@yahoogroups.com Subject: Re: [biofuel] Is it now time to talk to your congressman?? again steve spence wrote: > > Gasoline is ~118,000 BTU/gallon > Diesel is ~135,000 BTU/gallon > Ethanol is ~80,000 BTU/gallon > BioDiesel is ~117,000 BTU/gallon > > this, btw, is very interesting. take the time to go through it all. > > http://www.tc.gc.ca/envaffairs/climate/doc_converti/Etoh/ETOH-FNL-RPTAug30-1 999.htm > > http://www.eap.mcgill.ca/magrack/SF/Winter%2091%20M.htm > > http://www.afdc.nrel.gov/questions.html Thank you Steve! Have not read through entirely but question energy value that does not, I think, consider Internal Combustion (IC) engine compression ratio (CR) and ethanol OH, octane boost. For example (e.g.): http://www.eap.mcgill.ca/magrack/SF/Winter%2091%20M.htm "The energy value of a gallon of ethanol varies from 75,700 BTU 84,000 BTU depending on burning temperature. We will use a figure of 80,000 BTU as this is the energy value of ethanol burning at 25 degrees C." If eye remember correctly 100% ethanol optimally utilizes about 12:1 CR. As the ethanol to gasoline ratio increases ideally so should CR. With increased compression also temperature. I don't have a link at this time but what I understand is ethanol to gasoline relationship begins to balance or equalize efficiency (mpg) when engine/fuel specific CR is observed. The OH provides a measurable increase in complete combustion magnified by CR (ideally) suitable for ethanol octane rating. I believe I read this as well in the The Mother Earth News (TMEN) article about their ethanol pick up truck conversion or Steve or Keith's site on ethanol production. What I've observed with my GeMe is increased mpg with E-10/gasohol more then not. The station pumps reads: gasoline 87 octane, E-10/gasohol 89 octane. Again thank you Steve for the links and will read further. Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Please do NOT send "unsubscribe" messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.350 / Virus Database: 196 - Release Date: 4/17/2002 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.350 / Virus Database: 196 - Release Date: 4/17/2002 ------------------------ Yahoo! Groups Sponsor ---------------------~--> Buy Stock for $4 and no minimums. FREE Money 2002. http://us.click.yahoo.com/orkH0C/n97DAA/ySSFAA/FGYolB/TM ---------------------------------------------------------------------~-> Biofuel at Journey to Forever: http://journeytoforever.org/biofuel.html Please do NOT send "unsubscribe" messages to the list address. To unsubscribe, send an email to: [EMAIL PROTECTED] Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
