[Diy_efi] water injection

[David Allen]

  Some pulling tractors use water injection and multiple turbos at 250PSI 
plus boost, and LOADS of diesel fuel; they are getting 2000 HP 
(intermittent) from an engine that was originally made to put out 200 HP.
David


----- Original Message ----- 
From: <bearbvd at mindspring.com>
To: <diy_efi at diy-efi.org>
Sent: Wednesday, September 05, 2007 6:46 PM
Subject: RE: [Diy_efi] water injection


>
>
> Original Message:
> -----------------
> From: Klaus Allmendinger klaus at Innovate-tech.com
> Date: Wed, 5 Sep 2007 15:02:35 -0700
> To: diy_efi at diy-efi.org
> Subject: RE: [Diy_efi] water injection
>
>
> Why?
>
> Water injection on a gasoline engine is mainly there for knock
> supression. A diesel operates on "knock". It lives by compression
> ignition, which in a spark ignited engine is the reason for knock. The
> only reason I can think of for using port WI on a diesel is for slight
> NOx reduction. In a diesel with port WI this results in an increase in
> CO and HC emissions and a slight increase in fuel consumption from all
> the research papers I read.
>
>
> BZZZZZZZTTT !!!
>
> First of all, a diesel does NOT operate on 'KNOCK' !!! Detonation will
> destroy a diesel absolutely as fast as it will destroy a spark ignition
> (Otto cycle) engine.
>
> The burn in a diesel happens as fast as the fuel is EVAPORATED (after
> atomization). This is NOT an 'explosive' process, as knock is. This is
> PRECISELY why a diesel will destroy itself if fed a fuel which is harder 
> to
> ignite (to low a cetane rating) , such as gasoline !!!
>
> WI in the ports of a diesel isn't worth much, but it CAN be EVERY bit as
> effective as an intercooler if injected immediately post compressor !!
>
> WI , done properly, as an 'internal coolant' IS an effective knock
> suppressant, but it does a LOT more than that. GO READ THE ARCHIVES !!!!!
>
> Greg
>
> - Klaus
>
>
> -----Original Message-----
> From: diy_efi-bounces at diy-efi.org [mailto:diy_efi-bounces at diy-efi.org]
> On Behalf Of ian
> Sent: Wednesday, September 05, 2007 2:42 PM
> To: diy_efi at diy-efi.org
> Subject: [Diy_efi] water injection
>
> Hi guys.
>
> Im considering adding water injection to my little 1.0 turbo diesel
> charade.
>
> has anyone done something similar and has advice?
>
> Im intending to use a washer pump and agricultural (metal) spray nozzle,
> with a PWM controller that increases the pump duty cycle based on boost
> pressure in the plenum. I was intending to spray directly into the
> plenum, so as not to have water interfering with the turbo.
>
> thoughts ?
>
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