[AT] Mixing High Octane gasoline and Diesel fuel

[charlie hill]

Hi Dean,

I'm not altogether sure about that theory.  I was thinking that the purpose 
of octane in Gasoline was to raise the flash point and allow the engine to 
reach a higher compression ratio before the gas tried to ignite.  Higher 
octane ratings to compensate for higher compression engines.  It seems to me 
that adding diesel fuel would do the same thing as the octane.   If you put 
low octane gas in a high compression engine you get bad pre-ignition, spark 
knock and then dieseling when you try to shut the engine off.  If you add 
high octane to a low compression engine you really can't tell the difference 
except in the cost.

With the lower compression engines I wouldn't think the higher octane would 
really affect anything either way.  As long as it lights off when the spark 
plug fires and not before everything is fine.

Just my opinion.  I'm not sure it's right.

Charlie

----- Original Message ----- 
From: "Dean VP" <deanvp at att.net>
To: <at at lists.antique-tractor.com>; "AT JD" 
<antique-johndeere at lists.antique-tractor.com>
Sent: Tuesday, April 12, 2005 7:35 PM
Subject: [AT] Mixing High Octane gasoline and Diesel fuel


>I was informed of a way to get more performance out of our lower 
>compression
> engines that were designed to run on lower octane gasoline. The theory
> explained to me was that the current high octane gasoline burns too fast 
> to
> get full performance from our low compression, long stroke engines. It was
> stated that a 25% to 35% diesel fuel mixed with gas would produce a slower
> burn rate (lower octane) offering more power and torque. Intuitively, this
> theory makes some sense to me.
>
> Anyone with first hand experience trying this? Sure would solve the top 
> end
> lubrication issue. But ... with the downside of some potential 
> Pre-ignition
> knock. Then add some water???  :-)
>
> Dean A. Van Peursem
> Snohomish, WA 98290
>
> I'm a walking storeroom of facts..... I've just lost the key to the
> storeroom door
>
>
> www.deerelegacy.com
>
> http://members.cox.net/classicweb/email.htm
>
>
>
>
>
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