Why water injection?

[dzorde at aesprodata.com.au]

     Thanks guys, the info is much appreciated.  How do you think the cold 
     enrichment injector on a GM TPI system would go for injection and 
     place of injection point.  I'm currently running an aftermarket FI 
     system and not using the cold injector.
     
     Dan        dzorde at aesprodata.com.au 


______________________________ Reply Separator _________________________________
Subject: Why water injection?
Author:  diy_efi at coulomb.eng.ohio-state.edu at INTERNET
Date:    6/13/96 5:27 AM


     
>  Could someone please enlighten me as to why you would run water into 
>  your engine.  How does this stop knocking ?  Is it some type of carbon 
>  clean while you drive ?  Does it increase power ?  etc, etc.  I have 
>  only heard about it, but know nothing about it. 
>    
>    Dan        dzorde at aesprodata.com.au
     
The short and sweet answer is more power. This is an noticable 
improvement.  I use 30-70 mph tests in 3rd gear.  I was running 
9.3's, and have dropped that to 8.7's with water injection. 
Note that this test uses of off cam off turbo portion as well 
as the higher rpm regions.
     
In a little more detail, water evaporation densifies the air 
going into the engine, steam provides a powerful antidetonant, 
and the engine can run cooler.  With forced induction, this 
means you can then turn up the boost for yet more power.
I plan on running at 18 psig with a 7.0:1 compression engine, 
giving about 275 hp out of 2.15 liters.