[AT] Mixing High Octane gasoline and Diesel fuel

[pga2 at hot1.net]

There were two different methods of measuring octane of gasoline back before 
the late 70's. The "research' method and the "motor" method. Today, we have 
the average of the two methods posted on the gas pump. I'm not sure which 
method was used to post or display before that, but I do know that one was 
selected, probably the higher number, for advertising purposes.

Phil




----- Original Message -----
>From    : Dean VP <deanvp at att.net>
Sent    : Tue, 12 Apr 2005 21:35:35 -0700
To      : 'Antique tractor email discussion group' <at at lists.antique-
tractor.com>
Subject : RE: [AT] Mixing High Octane gasoline and Diesel fuel


>Landen:

That makes more sense if the engine was an "all fuel" engine, but what I'm
referring to is an engine that was optimized to run on gasoline in the 50's.
I have learned in this thread that the octane of gasoline was around 72
Octane then as opposed to our current 87 and higher octane gasoline. 

What still isn't totally clear to me is the difference between our current
gasoline's  flash point and the speed at which it burns once ignited vs the
characteristics of the gasoline's of the 40's and 50's. 

I think I have learned that the flash point is higher on today's gasoline
but it isn't yet clear to me what its burn rate is. I'm sure these
parameters are influenced by the compression ratio as well. 

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



-----Original Message-----
From: at-bounces at lists.antique-tractor.com
[mailto:at-bounces at lists.antique-tractor.com] On Behalf Of Landen Schooler
Sent: Tuesday, April 12, 2005 8:51 PM
To: Antique tractor email discussion group
Subject: Re: [AT] Mixing High Octane gasoline and Diesel fuel

I would think that number 1 kerosene would be better.
Since some of our beasts ran on distillate after
warming up on gasoline.

Landen Schooler
Palmyra, Iowa

Dean VP wrote:
> 
> 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
>

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