[Diy_efi] injector advance

[Gary]

----- Original Message ----- 
From: "Adam Wade" <espresso_doppio at yahoo.com>
To: "A list for Do-It-Yourself EFI" <diy_efi at diy-efi.org>
Sent: Saturday, August 07, 2004 4:48 PM
Subject: Re: [Diy_efi] injector advance


> --- Greg Hermann <bearbvd at mindspring.com> wrote:
> 
> > When you graduate to a modocum of understanding of
> > how alky fuels and/or water injection work, the
> > point becomes even MORE significant !!
> 
> It's spelled "modicum".
> 
> Yes, alcohol cools during intake, but several orders
> of magnitude more (between the greatly increased
> volume of fuel being delivered, and the lower heat of
> vaporization) than gasoline ever can or will, so it's
> not relevant to the conversation WRT gasoline.
>  
> And water injection does not cool in the intake charge;
> to the contrary, since water expands so greatly during
> vaporization.....
:cringe:  ... and ducking for the bear attack, and rightfully so.
I hope you didn't put that in your book.  Interesting subject, 
but you understand, way off subject line.
>
> ....I believe the trapped volume being
> compressed actually ends up HOTTER due to the higher
> combustion chamber pressure before ignition.  Water,
> even in vapor form, greatly slows the burn rate of the
> mixture, allowing higher boost without detonation. 
> This is even LESS topical to the conversation, since
> cooling is, as I understand it, not a factor here.
> 

GAS

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