holley water injectionRe: Water Injection. What do we agree on so far?

[Steven Gorkowski]

All I know about water injection is it works as advertised. I had a
holley water injection system on a ford 390 because I was getting knock
with regular gas put this unit on and the knock was gone. I used tap
water . The unit had a different jet for v8 ,6,4 so I don't know if the
volume of water is a big thing factor . I ran this for 5 years the only
thing I would add to the unit is near out of water light. The funny
thing about this car is it was the only car I owned that ran at 276,000
miles on original engine (one valve job) and was still running when sold
. This puzzled me till I heard of the cleaning action of water injection
from this group. If any one has the holley water injection box so I can
make a similar one main thing is the orifice size for a v8 or plans to
build a box I would be interested. It was the mid 80s when I had this
box and was plug and play so my details on how all the parts worked was
some what beyond my comprehension at that age. This is a good lesson on
doing things you think will work that others think are stupid and trust
me people looked at me funny when I told them I ran water injection.

Steve

Danny Barrett wrote:

> OK Gents. This discussion has happened a few times before, if we look
> in the
> archives, and to what I can tell, not once has a definitive answer
> been
> obtained as to whether water injection would/should work in normally
> aspirated engines. We should all know that it is very valuable as an
> anti-knock agent in turbo/supercharged engines - it has been used for
> years.
> I think that we obviously have some very intelegent people here, and I
>
> believe that we should be able to come up with an answer to this
> problem, so
> that if the subject comes up again by newly registered people to this
> mailing list we can give them the one true and final answer (if
> possible),
> and tell them to look it up on the archives (and, yes, I'm actually
> the
> guilty party for bring up the topic this time, as I have a certain
> amount of
> knowledge, but I want to know the absolute answer).
>
> What do we all agree on? Who agrees/disagrees with the following?
>
> It has been shown that the water injected will vaporise before TDC,
> and
> remain vaporised throughout the compression/power strokes.
>
> For economy and power in normally aspirated engines, to reduce the
> amount of
> energy lost due to latent heat of evaporation, the water should be
> heated by
> the exhaust manifold to say 90 deg C (194 deg F), so that it is still
> a
> liquid, and not simply another inert gas.
>
> If the anti-knock properties are needed (ie. Turbo, and Supercharged
> engines), however, the water should be injected cold to make use of
> the
> latent heat of vaporisation (Note, this has been a known, tried and
> true
> method for possibly longer than many of us have been around).
>
> For fuel economy in normally aspirated engines, a small amount of
> water may
> help, but it should not be used in quantities remotely resembling
> those used
> in turbo/super charged engines.
>
> Questions yet to be answered in gaining the absolute answer:
>
> Are the expansion properties of steam better than those of N2, O2 (ie.
>
> excess O2 in the charge), CO2 and NO (produced at least in small
> quantities
> due to the heat of the reaction in the cylinder)?
>
> If so, what quantity of water, at what temperature should be injected
> so
> that the benefit of extra horespower (without extra fuel) is maximised
>
> (considering water's tendancy to "put out" the combustion process)?
>
> Also, If water injection (without an increase in fuel used) gives more
>
> power, would this equate to more fuel efficiency if your driving
> habits do
> not change?
>
> If water injection is viable (as far as increased power/efficiency is
> concerned, without the use of extra fuel), how (or should) we
> de-chlorinate/de-floridate the water? Should we use a vehicle mounted
> charcoal filter? Or should we filter the water before it is put into
> the
> vehicle?
>
> If you have any other questions/points, feel free to add them...
>
> Danny Barrett.