1) alcohol burns blue so burns at a higher temperature
2) alcohol’s combustion specifics in a combustion chamber give a burn pattern that causes sustained increased pressure.

From the horses mouth:

The main reality, is that various combustion aspects of a gas engine have to be taken into account, as the volatility and thermal efficiencies of gas and alchohol (and thus alchohol-based fuels) are widely different. Inlet valves (particularly), exhaust valves and spark plugs all require consideration. As does lubricant, as some alchohol-based fuels have far greater cylinder “Wash-Down” properties.

forums dot techguy dot org slash 3827183-post25 dot html

I think the heat of combustion is more relevant than what you reference, but I think we need more specific data to determine the answer.

b. Combustion characteristics

There are some important differences in the combustion characteristics of alcohols and hydrocarbons. Alcohols have higher flame speeds and extended flammability limits. Also, alcohols produce a great number of product moles per mole of fuel burnt, therefore,
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higher pressures are achieved.
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Higher pressure equals higher temperature.

Right back at you again.

Right back at you

Thats not what I’m saying. Burning a fuel in open air is very different than what takes place in an engine.

An assertion was made that ethanol (or adding it to gasoline) results in an engine running hotter. I have seen no evidence of this, and in fact find that the opposite may be true (although the effect is pretty small)

From your reference:

“Another important property is the heat of combustion, or the energy available per unit of volume of a mixture chemically correct (stoichiometric) of a fuel and air: Gasoline=3600 KJ/kg, Ethanol=3412 KJ/kg”

This means that less energy is released from the combustion of ethanol, which seems to counter the previous statement of running hotter

Well, i guess if you deny the laws of thermodynamics and substitute your own anything goes.

b. Combustion characteristics

There are some important differences in the combustion characteristics of alcohols and hydrocarbons. Alcohols have higher flame speeds and extended flammability limits. Also, alcohols produce a great number of product moles per mole of fuel burnt, therefore, higher pressure are achieved.

I can’t post links because then i’ll end up in the spambox, google
“5. Alcohol and cotton oil as alternative fuels for internal combustion engines ”
yourself. (no it’s not wikipedia)

Actually that says very little at all. Engines do not simply light things on fire… just the ratio of fuel/oxygen alone is a more important factor for temperature than fuel type alone in these examples. So far your evidence involves asking a tractor puller, and looking at the color of a flame, neither of which informs the question sufficiently.

Petrol burns yellow/orange, alcohol burns blue. Says it all i guess

Alcohol burns blue, petrol burns yellow. You figure out which one is hotter.

A couple points:

“Dr.” Sarah Bridges, who’s specialty is never discussed, is a Phd Psychologist who has been chasing this anti-vax stuff for years.

Alisyn Camerota is, well, a moron. Where have all the journalists gone?