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[GMCnet] Re: Interesting Article on Ethanol [message #369123 is a reply to message #369121] Wed, 16 March 2022 09:52 Go to previous messageGo to previous message
James Hupy is currently offline  James Hupy   United States
Messages: 6806
Registered: May 2010
Karma:
Senior Member
I am an old drag racer. When I had my own race car, it ran on white pump
Chevron gasoline, 105 octane single method determined. That probably
equates to an octane rating of 110 by the combined rating method. We could
get by with 11.0 -1 compression ratio because of the altitude and fuel rich
mixtures. But, we had to be careful at places like Half Moon bay in
California, which were at sea level. More O2 in the air there. Leaner
mixture. In those cases, we would use racing gasoline or aviation fuel.
Later on, when I just drove for other race teams, I ran both pure
methanol, as well as a blend of Nitromethane, Methanol, and 2% benzene to
control knock. Of course, fuel economy wasn't an issue, horsepower was.
I learned an awful lot of very expensive lessons in a short amount of
time back then.
This was when gasoline anti-knock compounds consisted of Tetra-ethyl
lead. That stuff in pure form is deadly stuff. You don't want it on your
skin, or in your lungs in any amount, no matter how small. But an extremely
small amount of it would treat a whole bunch of gasoline. That is why it
was used. In those quantities, it was the cheapest thing going.
But bad for people and other living things. So alternatives were
searched for and MTBE got a lot of use. But it turned out to be almost as
bad as TEL. Then along came methanol. It keeps knock under control, cheap,
and can be made from corn.
So, we are stuck with it for now.
Jim Hupy
Salem, Oregon

On Wed, Mar 16, 2022, 7:26 AM John R. Lebetski
wrote:

> Just for ref pure ethanol has an octane rating of 113.
> --
> John Lebetski
> Woodstock, IL
> 77 Eleganza II
> _______________________________________________
> GMCnet mailing list
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