water injection

[Bruce Plecan]

-----Original Message-----
From: Pedro Haynes <edwards at mail.sunbeach.net>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Friday, December 18, 1998 1:35 AM
Subject: water injection

Item 1, not all classes of racing allow intercooling.
2.  Not everyone can afford a perfect intercooling setup.
3.  Some folks like to tinker.
4.  Are you running a pneumatic valve train?.
5.  While novel, F1 has been increasingly distancing themselves from any
    real world applications.
6.  Our diesel tractor would rate a detonation ignition, and does very well
    thank, with lots of water.
7.  Speaking as someone that has actually benefited from using it, I can
    say it is very effective.
8.  If you care to research it, try Sir Harry Ricardo's, "High speed
interanal
    comustion Engine" book.
Bruce



>Running a water injection system is a waste of time I must say. The only
>thing it does is cool the combustion chamber and thus prevent detonation.
>With proper intercooling, the right advance and sensable boost, (use
>calculations), there is no need for water injection. Water injection is
>about 20 steps back, do you know of any F1 cars that use water injection?
>
>
>
>
>>Running out of water on a water injection system will cause the engine
>>to knock, so getting too much air  (and given the amount of air ithat
>>most engines use, I really cannot see a hose of the size you would be
>>using suppling enough  air to make any significant difference).
>>Running out of water when you are using it to allow more advanced
>>timing would be potentially fatal to your engine no matter how you do
>>it.   Probably it would be best not to run out of water with any
>>system, since the water pump will also probably pump air pretty good
>>too.  Also the nozzles may limit the air soo much that there is not
>>enough volume to worry about (of air).
>>
>> Roger
>>
>>On Thu, 17 Dec 1998 TMead17327 at aol.com wrote:
>>
>>> Wouldn't there be a problem with leaning out when the water ran out?  It
>>> doesn't sound very good to suddenly inject extra air into the manifold
>without
>>> telling the fuel system about it.  I guess it depends on how you measure
>your
>>> intake air (MAP, MAF, etc.)
>>>
>>> Tommy
>>> TMead17327 at aol.com
>>>
>>> In a message dated 12/17/98 11:57:32 AM Central Standard Time,
>>> rah at horizon.hit.net writes:
>>>
>>> <<
>>>  Here is an odd thought, what about putting the water in a pressure
>>>  tank of some sort and putting compressed air over it.  Enough volume
>>>  of compressed air, and you should be able to maintain a fairly decent
>>>  pressure until most of the water runs out.   You would of course have
>>>  to air up after putting the water in, and probably put the thing in
>>>  the trunk or someplace with a similar amount of room.  And probably
>>>  you would need a pressure regulator on the water, or some way to sense
>>>  the watter pressure, and adjust the nozzle PW to get the correct flow.
>>>
>>>  Just an odd idea
>>>  Roger
>>>   >>
>>>
>>
>>
>>
>