[Supras] E85 retrofit

Wed Sep 6 08:02:19 CDT 2006

quote from wikipedia:

"pure ethanol has a much higher octane rating (116 AKI, 129 RON) than ordinary gasoline (86/87 AKI, 91/92 RON), requiring changes to the compression ratio or spark timing to obtain maximum benefit. [10] To change a pure-gasoline-fueled car into a pure-ethanol-fueled car, larger carburetor jets (about 30-40% larger by area), or fuel injectors are needed. (Methanol requires an even larger increase in area, to roughly 50% larger.) Ethanol engines also need a cold-starting system to ensure sufficient vaporization for temperatures below 13 °C (55 °F) to maximize combustion and minimize uncombusted nonvaporized ethanol. On the other hand, if 10 to 30% ethanol is mixed with gasoline, no engine modification is typically needed. Many modern cars can run on these mixtures very reliably."

"Some of the problems experienced with ethanol include:

Ethanol-based fuels are not compatible with some fuel system components.[citation needed] Examples of extreme corrosion of ferrous components, the formation of salt deposits, jelly-like deposits on fuel strainer screens, and internal separation of portions of rubber fuel tanks have been observed in some vehicles using ethanol fuels.[citation needed] 
The use of ethanol-based fuels can negatively affect electric fuel pumps by increasing internal wear and undesirable spark generation.[citation needed] 
E-85 is not compatible with capacitance fuel level gauging indicators and may cause erroneous fuel quantity indications in vehicles that employ that system.[citation needed] 
Ethanol will mix with either water or gasoline, but not both. For water levels below approximately 0.5% to 1.0% contained in the ethanol, there is no problem. For contamination with 1% or more water in the ethanol, phase separation occurs, and the ethanol-water mixture will separate from the gasoline.[citation needed] 
E-85 experiences heavy evaporation losses. [citation needed] "

heres the link to the article:

http://en.wikipedia.org/wiki/Ethanol_fuel

-Sean

> Date: Wed, 6 Sep 2006 08:34:30 -0400> From: supraman88 at verizon.net> To: supras at supras.com> Subject: Re: [Supras] E85 retrofit> > Can't agree with this statement.> > In 1980 I bought a brand-new Corolla SR-5, and was living in New Hampshire > at the time. The local BP station was selling Gasahol, which was either 15 > or 20% ethanol mix. Running Premium, I was getting ~34 MPG, and ran the car > on Gasahol for a full year.> > The car went 245,000 miles with a water pump and the E-Brake cable as the > only actual repairs that had to be done to the car.> No burned rings, no burned pistons, etc that everyone told me would happen > from running Gasahol.> > > > ----- Original Message ----- > From: "Jeff Mohler" <speedtoys.racing at gmail.com>> To: "Jim Thomann" <list1 at thomann.no-ip.com>> Cc: <supras at supras.com>> Sent: Wednesday, September 06, 2006 1:00 AM> Subject: Re: [Supras] E85 retrofit> > > > It has less energy in a given volume, and yes, you need to pump up> > compression to make up for it.> >> > I wouldnt touch it in a car not designed for it, far too much to loose.> >> >> >> > On 9/5/06, Jim Thomann <list1 at thomann.no-ip.com> wrote:> >> I agree.  Not many people will use E85 when it becomes more available if> >> the price/performance stays so poor.> >>> >> I don't know what E85 typically come in at, but it does have a higher> >> octane rating, right?  Can't that be used by design or tuning to make up> >> some of the performance gap?> >>> >> What about lines and seals?  Will the internals hold up?> >>> >> Brandon wrote:> >>  From what i have heard and found through minimal research.   Is that> >> E85 has> >> to run at a far richer a/f, which means worse MPG than you get now, and> >> will usually require larger fuel injectors to accomadate this.   I was> >> going to try it on the Honda i had for a winter beater last year, since> >> the ECU's can be easily chipped, and i can burn a chip w/ two programs> >> and switch between them w/ a switch it would have been perfect.  Problem> >> was there was only one gas station i found in town that carried it,(this> >> is in NEBRASK!!! we have plenty of damn corn here!)  and it was still> >> expensive....> >> http://www.usatoday.com/money/industries/energy/2006-02-14-e85-usat_x.htm> >> for example.  Thats when i quit thinking about it.> >>> >>> >> _______________________________________________> >> Supras mailing list> >> Supras at supras.com> >> http://supras.com/mailman/listinfo/supras_supras.com> >>> >> > _______________________________________________> > Supras mailing list> > Supras at supras.com> > http://supras.com/mailman/listinfo/supras_supras.com > > > > _______________________________________________> Supras mailing list> Supras at supras.com> http://supras.com/mailman/listinfo/supras_supras.com
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