Water Injection for power?

[Mark Pitts]

My exhaust system has a 'sump' in it, and on a really cold start (-10c), =
it condenses in the pipe, and fills up.

I know this, because while manouvreing out my works car park (after =
leaving the car there for a night due to snow), I blew enough shit out =
on a quick blip to completely drench wis white BMW in black water!

I recon I got about 1/4 pint of water out after it had been warming up =
for 20 mins on full choke!
(looked like a glass full in quantity).

Mark

(who is no longer employed by the above BMW driving boss) ;-)


----------
From:  Arnaldo Echevarria[SMTP:aec at ao.net]
Sent:  Wednesday, September 11, 1996 1:24 AM
To:  diy_efi at coulomb.eng.ohio-state.edu
Subject:  Re: Water Injection for power?

>I Remember two relevant curves - holding fuel constant, power went up=20
>linearly with water on a percent by percent basis.  100% fuel 10% =
water,=20
>+ 10% power etc. until a practical limit of about 50% was reached.
>
>Holding power constant, each percent of water displaced a percent of
>fuel until about a 50 50 ratio was reached.

So if I went out to my car and fed my 455ci engine a 50/50 mix of water/
fuel I'd get the same power?  I have a hard time believing this at full
throttle - plus I cant afford that much water :(, but will it work for =
part
throttle, ie cruising, speeds? =20
I think I can get around the mineral buildups with a weekly trip to the =
track
w/ high octane gas.....

>WTF does it work?  70% plus of chemical energy released by combustion
>leaves the engine as excess heat.  Absorb any of that EXCESS heat and
>turn water to steam and you gain either power or fuel economy or both.

But won't the added water particles reduce the ability to create a =
complete
combustion?
>
>PS   Ever wonder what is really going on during combustion.  Check the
>pressure temp curves of the three major gasses present after =
combustion.
>CO2, N2 and H2O.  Check out how much partial pressure each contributes
>to the mix.  Then remember, that as a rough approximate, one gallon of
>gasoline makes 2 gallons of water in the exhaust.=20

That much water comes out of my tailpipe?

Arnaldo