[Diy_efi] water injection

James Panter 9jim30
Fri Sep 28 18:16:07 UTC 2007

This whole discussion is very subjective.  "Audible detonation" depends on 
how good your hearing is and this is very critical
Also what is the ambient noise level around the engine------cabin 
insulation, exhaust silencing, etch.   I no longer have the same ability to 
hear certain frequencies that I once did.  I thought one time that it was 
only the higher notes but certain other sounds like detonation I also no 
longer hear as well.  If you depend on hearing it you could be in for a rude 
surprise.   I supose a warning light could be rigged to go on at a certain 
level------wouldn't that be a good thing?
----- Original Message ----- 
From: "Adam Wade" <espresso_doppio at yahoo.com>
To: <diy_efi at diy-efi.org>
Sent: Friday, September 28, 2007 1:07 AM
Subject: Re: [Diy_efi] water injection

> ----- Original Message ----- 
> From: "ian" <spyro at f2s.com>
> To: <diy_efi at diy-efi.org>
> Sent: Thursday, September 06, 2007 6:35 AM
> Subject: RE: [Diy_efi] water injection
>> no. compression ignition doesnt imply knock. in fact, a diesel will
>> have
>> a nice, constant burn as fuel is injected.
> The Internal Combustion Engine in Theory and Practice, by Charles
> Fayette Taylor:  Volume 2: Combustion, Fuels, Materials, Design.  pg.
> 95:
> "In practice, most diesel engines have a rate of pressure rise
> sufficiently high to cause audible noise.  When such a noise becomes
> excessive in the opinion of the observer, the engine is said to
> 'detonate' or 'knock'.  It is evident that personal judgment is here
> involved.  Thus, in the compression-ignition engine there is no
> definite distinction between normal and 'knocking' combustion.  It is
> merely a question of whether or not the rate of pressure rise is high
> enough to cause, in someone's judgment, objectionable noise or
> excessive vibration in the engine's structure."
>> My engine is turbo'd. cooling the air will result in a denser air
>> charge, and thus more power under boost.
> A diesel will only make more power under boost when all of the
> available incoming air is used in combustion, i.e. at a very high
> power level.  In a street-driven vehicle, I would expect more power to
> be forthcoming from a diesel only when the pedal is mashed to the
> floor, and possibly not even that depending on road speed and gear
> selection.
> |    Kawasaki Zephyr 615 (Daphne)     1985 RX-7 GSL-SE (Rex)    |
> | "It was like an emergency ward after a great catastrophe; it  |
> |    didn't matter what race or class the victims belonged to.  |
> |  They were all given the same miracle drug, which was coffee. |
> |   The catastrophe in this case, of course, was that the sun   |
> |               had come up again." -Kurt Vonnegut              |
> |  Motorcycle Fuel Injection Hndbk. - http://tinyurl.com/2v5o97 |
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