[DML] Re: Water Injection (was Turbo PRV)

["David Teitelbaum" <jtrealty@xxxxxxxxxxxxx>]

Water injection was origionally used in aircraft to prevent
detonation. It was a good method because it was cheap and the aviation
fuels of the time were not good enough. It also helped a great deal
when aircraft started using forced induction. This is the best
application, it doesn't help as much on a naturaly aspirated engine.
Water injection lowers inlet air temps, increases the density of the
air-fuel charge, and lowers combustion temps and pressures. In short
it gets you more power out of the same engine. Since inlet temps go up
with a turbo (or a supercharger)it works much better than without.
There have been mixtures tried over the years too with water and
alcohol, methanol, and other things. The type of mixtures are very
critical and can go wrong very quickly so most applications stay
simple and only use water. Most of the time injection systems use
pumps, valves, switches, and other things that can make the system
very complicated. The pressure bottle is one of the simplest and
neatest ways I have seen to do water injection but it won't work
unless you have a turbo or a supercharger. You *could* put a bottle of
compressed gas in the car to force the water out. Done all the time on
dragsters to power the shifters. If you are going to experiment with
water injection you also have to play with the spark advance. You want
to get as much as you can because more advance=more power. The water
injection allows you to put more advance in. I would not mess with
methanol. Very volatile and in a mist it can become explosive.
David Teitelbaum
vin 10757


--- In dmcnews@xxxxxxxxxxxxxxx, "Marv Hein" <marvhein@...> wrote:
>
> Turbos aside for a moment, I've read that water or water/methanol 
> injection provides "some" improvement to normally aspirated engine 
> performance. 
> 
> Kits with pumps are available from a variety of places for a couple 
> hundred dollars. 
> 
> Some turbo DeLorean implementations have used turbo pressure to 
> 








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