[Diy_efi] water injection

Sat Sep 29 14:32:13 UTC 2007

Well, unfortunately Mr Donegan has been busy/lazy/etc and hasn't done
much lately on the ECU project except 'analysis paralysis' for those not
familiar with the term it's one used in Engineering where every time you
start to decide on a choice another possible solution presents itself.
In the case of the ECU it's the CPU itself. I will make a decision
before Christmas and get the project back on track.

On Fri, 2007-09-28 at 22:54 -0700, Adam Wade wrote:
> ----- Original Message ----- 
> From: "James Panter" <9jim30 at charter.net>
> To: <diy_efi at diy-efi.org>
> Sent: Friday, September 28, 2007 11:16 AM
> Subject: Re: [Diy_efi] water injection
> 
> > I suppose a warning light could be rigged to go on at a certain 
> > level------wouldn't that be a good thing?
> 
> Probably even easier to simply install a knock sensor on the block (or 
> a piezo unit under the washer of one or more of the spark plugs) and 
> let the ECU retard ignition timing (within limits) if it detects 
> knock.  You could go to ion sensing if you have access to the hardware 
> something like that would need.  I'm excited at the prospect of 
> closed-loop spark control via ion sensing, and I'm hoping to see 
> through the modular ECU project Mr. Donegan and I have been discussing 
> for some time now.  :)
> 
> |    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 |
> > 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 ----- 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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> >
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> 
> 
> 
> 
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