[Diy_efi] Propane injection (KISS)

[Ray Drouillard]

Liquid propane injection is available.  One huge advantage is that it cools
the intake charge, and therefore makes it more dense.  The experiments that
I read about showed an increase in power compared to regular gasoline
injection.

Ray Drouillard


----- Original Message -----
From: "Mark Linder" <mark.linder at verizon.net>
To: "'List for general do-it-yourself EFI talk'" <diy_efi at diy-efi.org>
Sent: Thursday, April 24, 2003 1:07 PM
Subject: RE: [Diy_efi] Propane injection (KISS)


> I may be wrong, but it was my understanding that you NEVER wanted to
> inject liquid propane.  From everything that I have read, only vapor
> should be injected.
>
> Mark
>
>
>
> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]
> On Behalf Of A70Duster at aol.com
> Sent: Thursday, April 17, 2003 7:56 AM
> To: diy_efi at diy-efi.org
> Subject: [Diy_efi] Propane injection (KISS)
>
>
> I have some extra low-impedance injectors that I first applied 120 PSI
> compressed air to and the injectors operated correctly.
>
> Then I plumbed liquid propane (from a propane tank with the valve on the
>
> bottom) to the injector and pulsed it.  Again the injector was working
> correctly.
>
> The problem was that a mix of liquid and vapor came out of the injector,
> even
> after a minute of pulsing the injector.  My guess is that the liquid
> propane
> is boiling in the transfer tube.  How does one stop this while keeping
> things
> simple?!?!  Insulate the line can help with heat intrusion and maybe a
> liquid/vapor separator.
>
> I don't want to add a fuel pump and regulator, I can live with tank
> pressure
> at the injector, but should find out the pressure that the injector
> doesn't
> open at.  And I want to inject liquid propane.  Phase change cools the
> air
> drawn in and I can deliver A LOT more liquid propane than vapor propane.
>
> Why do I do this?  With propane at 110 octane and I can get it for $1.30
> a
> gallon, I could run on 87 octane gas for cruise and then kick in some
> liquid
> propane under heavy loads/WOT conditions.  This would first be applied
> to a
> turbo 4 banger, then who knows what is next..>:-)
>
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>
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