Yeah, I don't like the idea of spraying a
flammable liquid right next to a scorching hot
turbine housing.  :-(

Also, alcohol takes less energy away in the
evaporation process than water does...so spray-
for-spray, it would have less cooling effect than
plain water.

Steve

This is not meant as any disrespect to the poster of original link.  It is
meant as a critical review of the products presented in the above link.  If
anybody else checks out the above link, let me know what you think.

The above site was good for a laugh.  I was going to mention the CO2
sprayers for IC which I have seen before, however I had not heard of these
people.  They bring up one valid point on the whole site, "CO2 displaces
Oxygen" (well this is true for any gas that you push into a contained area)
and that if you put CO2 under the hood it could get into the intake, not if
you have a cool air intake under one of the fenders, but ok, I see their
point.  Their, interfreezer thing sounds like a cool idea, no pun intended,
however I have one question.  It is obvious that it will cool the air and
will condense the H2O as is shown on the outside of the unit on the website.
This will also happen on the inside of the unit which they say is a good
thing, (I agree) however what happens to this water which is condensed on
the inside?  Two things in my opinion.  One, it freezes and restricts your
intake, which is a bad thing, and two when you stop using the unit the water
melts and goes into the engine.  So to me this means that one, this is a
short term use item, and two it has the possibility to dump a bunch of water
into your engine when you stop using it.  Does anybody else see a problem
with this?

The Flowducer also at first glance seems like a fun idea.  Granted their
ideas are aerodynamically sound (I'm not an aero engineer but was best
friends with two of them in college), but vacuum on your exhaust is not
always a good thing at least  for turboed cars (WRX included).  In reading
some FAQs on exhaust systems on turboed cars I recall running into a
phenomenon in which you can have too little backpressure on the exhaust side
of the turbo.  Of course more air flow = more power, which is why intake and
exhaust mods are done, however putting a 3 inch exhaust on a turboed car
only make sense with a huge turbo.  As I remember it, you can infact
effectively "stall" out the turbo (maybe that's not the right term), but it
increases turbo lag.  This would not really be a problem once you have the
turbo spinning but who wants to be fooling around turning something on under
boost?  Not to mention how the turbo would react to a change in exit
pressure, and all the above assumes that the pressure difference due to this
device is significant which may not be true.  It might work for non-turboed
cars but I would not put one on a WRX.  That's only my opinion.

And as for the Cheetah jets?  Do I have to go there?  How much more "Fast
and Furious" do you have to get?  For looks maybe, but then do we really
want to ascribe to "the all show and no go" theory?  Plus if you have to
kill your opponents horsepower via CO2 attack, you are not really racing
anyway, and it means you don't have the confidence in what you have under
the hood.  Again, just my opinion.

Ed

http://www.cryofuzion.com/spraybar.htm

Says spraying CO2 on the IC is BAD!