Re: water injection

[Paul.J.Timmerman@jpl.nasa.gov]

In fact, I have tried it, and had some success.
I bought a number of different nozzles (ouch $$)
and played with delivery rates, pressure, and control.
  
I have to say in all good faith that There are some
concerns with the technique.  

1.) A stuck on condition could hydrolock you motor.  

2.) Freezing your resevior is a concern.

3.) Adding methanol to prevent freezing / increase fuel 
delivery brings in materials/corrosion problems.  

4.) If you turn up the wick real high to use all that 
anti-denonation capability, then run
dry, you need to start shopping for new pistons.

Those warning being said, it is possible to run a system 
that provides a notable incremental improvement in performance,
that will avoid ALL of these pitfalls.  I have played around with
the idea of offering some to help the intercooler in times of heat.

I collected data on the effects, including acceleration times,
turbo outlet temps, IC outlet temps, and manifold inlet temps.
What I found is that at high flow, the K26 it pumping mighty
hot air (~180C) and the IC is not cutting it down far enough
(still over 100C), but a spray of water controlled the spikes 
up to 18 psi manifold pressure, with repeated runs at WOT from 
a stopped condition.  Freeway driving is much easier on the 
system, cause of all the cool going over the IC. 

Looked at this way,  it is pretty cheap horsepower.  I run 16-17
normally, but hook up the water for 18 psi operation, and it
does cut about one second out of the 30-70 times runs. If that
is a 12% improvement on 240 HP then that would be 28 HP.  To
take advantage of the system you really should have adjustable boost, 
and that is not for everybody.

paul timmerman