[s-cars] Toluene, Race Gas, Water Injection, etc

[Kirby Smith]

Bruce:

I think the point was to use the Labtronics unit for controlling water
injection.  The sensor pair would still show whether the intercooler was
getting hot, and minimize injection under cold conditions.  Of course,
if you are running a boost pressure that would detonate when the mixture
is compressed from room temperature, then the Labtronics unit would not
be optimal.

Ideally, the water/ethanol flow would be controlled by pressure and
temperature and knock sensor output.  The trick is to handle a whole
range of temperatures and pressures and spark conditions.  In my 1966
Corvair (no intercooler), for example, while knocking could occur at
full boost, particularly after the heads got hot enough, knocking at
part throttle at too low an low rpm up a hill was possible.  Generally,
the driver had to address these issues with his foot; for an automated
system, the complexity might be considerable.

kirby

Bruce Mendel wrote:
>
> I looked at the intelligent auto spray, and the spray triggers were well
> designed, and all in all it was a nice system.
>
> However, the intake temp reductions were exponentially greater with water
> injection aft of the intercooler as compared to spraying on the intercooler.
> It was more money, but seemed to me at least to be a better performance
> tradeoff.
>
> The toluene spray idea is pretty much what you get with a good Aquamist
> atomizing nozzle and using 50% methanol in the water injection.
>
> I'm also considering hooking up two extra nozzles to mist the brake rotors
> for summer track events (not using methanol of course!).
>
> Bruce
> ----- Original Message -----
> From: <S4audinut at aol.com>
> To: <charlie at elektro.cmhnet.org>; <HoosierMP at aol.com>
> Cc: <s-car-list at audifans.com>
> Sent: Sunday, November 03, 2002 2:53 PM
> Subject: Re: [s-cars] Toluene, Race Gas, Water Injection, etc
>
> > --
> > [ Picked text/plain from multipart/alternative ]
> > In a message dated 11/03/2002 2:16:53 PM Eastern Standard Time,
> > charlie at elektro.cmhnet.org writes:
> >
> > > I suggest you look at the Labtronics Intelligent Intercooler Water
> Spray:
> > >   http://www.elektro.com/~audi/labtronics/
> > >
> > > It's a very well done unit that monitors ambient temperature and
> > > intercooler temperature on the BACK of the intercooler, and knows
> > > when you've got a load on the engine by watching the duty cycle
> > > of an injector.  Both load and temperature sensitivity are adjustable
> > > so it can figure when to close a relay controlling a water spray pump.
> > > This really helps conserve whatever fluid you are using.
> > >
> > > It seems to me it was about $100 US by the time it was shipped here.
> > >
> > >   - Charlie
> > >
> > >
> > >  Charlie Smith   charlie at elektro.cmhnet.org  614
> >
> > We could be onto a real perf. gainer here, Toluene injection, think about
> it!
> > Rod
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