Re: Fw: Octane

On Tue, 25 Jan 2005 mail-return@xxxxxxxxxxxx wrote:

> Subject: Fw: Octane 
> 
> A friend sent me this info.  Add toluene to the gas...
>
> http://www.elektro.com/~audi/audi/toluene.html
>
> Has anyone seen, evaluated or actually tried this?

It's an ingredient in "dry gas". I wonder how it is on hoses, in
larger quantities. Its combustion byproducts might not be so good,
and it's expensive, but might be fun to play with.



> I also had dual fuel propane setup
> which pretty much eliminated any carbon buildup which also helps prevent
> pre-ignition knock so I don't know which was the most help for me... I did
> drive primarily on propane.

"Octane" with LPG is crazy high; the problem is it's
stoichiometric ratio is 12:1 or so instead of 14:1 so you need
more air per cylinder fill therefore you get less fuel and less
HP. There's less BTUs per unit LP vs. gasoline too, but half of
that can be made up for by increased compression (apparently over
12:1 just fine) and ignition timing.

My LP Rambler can't run as much advance as it ought to, and I
think it's because when I built the motor I left too much squish
space, and get detonation in there. Too bad. I won't get to know
until the next head job, but that's not for years. I hope.

It would be interesting to mix gas and LP simultaneously,
but I think the benefits would be more easily obtained
in traditional ways.

 		signed,

 			mail-return




aka tomj