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      09-01-2012, 07:58 AM   #82
vasillalov
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Quote:
Originally Posted by MDORPHN View Post
Accusing folks of "propagating a lie" does not encourage informed discussion of any topic, but.... the subject of ethanol's "effective octane" (which is far higher than you suggest), at least in a direct injection motor, is far more complicated.

Take a look at these articles:

http://web.mit.edu/mitei/lfee/progra...2008-01-rp.pdf

http://web.mit.edu/mitei/lfee/progra...2008-01-rp.pdf

dspace.mit.edu/bitstream/handle/1721.1/69496/775670245.pdf

Neil
Neil,

Read those articles carefully! They are talking about pure ethanol, not E85. Like I said before, there is a big difference between pure ethanol and E85 fuels! They ARE NOT the same.

From your MIT PDFs:
Quote:
IV. Effective Octane Number Of Ethanol
Table IV shows the results for direct injection of ethanol. The calculations are performed
for a given ethanol fraction addition, defined as the fraction of the fuel energy that is
provided by the ethanol or a high concentration ethanol blend such as E85. This fraction
was 20%. For the present calculations, neat ethanol (E100) was used.
So yes, you are still propagating a lie!
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