[Diy_efi] PW Controlled Sequential Water Injection - It RUNS!

[Alexis PAVLOV]

Hi Daniel,

Would you have some pointers at explanations about cruise mpg
improvement ?

Alexei


"Daniel R. Nicoson" wrote:
> 
> It ran.  I'm happy and celebrating with a bowl of vanilla ice cream & Oreo
> cookies and a Mt Dew.
> 
> I ran it tonight for about 15 minutes, only a few leaks to fix and a
> pressure gauge to wire up Saturday AM.  Hopefully dyno time over the
> weekend.  I can't claim any blazing performance improvement based on
> tonight's run.  I still have to load the appropriate tune into the EEC to
> take advantage of the system.  The EEC Tuner list was helping me with that
> tune today.
> 
> What is it?
> 8 separate 14# injectors with their own "water feed rail", water pressure
> regulator referenced to intake vacuum (actually a 1994 Mustang 5.0 fuel
> regulator), a 6 gallon supply tank in the trunk with a Sureflo diaphragm
> pump.  Water flows up to the feed rail through your basic 300 psi air
> compressor hose and the return flow through the same.  I built an analog
> controller that is triggered by the respective fuel injector pulse width,
> the water injector is delayed a set amount of time and then fires for the
> remainder of the pulse width.  This delay is adjustable giving me the
> ability to change the percentage of water injected.  I have 30# fuel
> injectors.  I also use the EEC Tuner which gives me full control over my
> fuel tables and spark tables.  The injector drivers are proper P & H if I
> ever need to run lo impedance injectors.  Right now just running Crown Vic
> 14# high impedance injectors.
> 
> What's it supposed to do on a NA 1994 5.0 Mustang?
> 
> Two things, provide detonation resistance at WOT (two T-3 turbos waiting for
> an install...) and POSSIBLY improve highway cruise mpg.
> 
> Theory:
> 
> WOT operation you guys all know.  Cooler intake charge; also water replaces
> the extra fuel normally used to cool the cylinder during the combustion
> event.  I'll be experimenting with pretty lean mixtures at WOT (13:1 even
> 14:1 AFR).
> 
> Highway cruise. Based on some WWII research reports - they were running up
> to 50 parts water to 100 parts fuel at high load, achieving great power
> gains AND achieving about 10% improvement in efficiency.  My thoughts were
> that 50% water at low LOADs probably would be too much but if I built the
> controller with some adjustability I could EXPERIMENT and see if a lesser
> amount of water would help at highway cruise.
> 
> Most of the ideas I used were from you guys on these lists.  A lot of people
> from various lists have contributed.  I think we started discussing pulse
> width controlled sequential water injection back in July 2003.  I've been
> working on it ever since.  I had to learn all about the electronics and
> spent most of this 15 months getting all that working right.  My wife jokes
> that I could open a Radio Shack store with everything it took to finalize
> the circuit (most of it came from Mouser and Digi Key).  The fabrication to
> mount the extra injectors under my Trick Flow manifold took over a month.
> The feed rail is welded stainless steel (Dustin where I work is a wizard
> welder!).  The wiring harness in the car was a LOT of work.
> 
> This is an EXPERIMENT!  Eventually I will write all this up, post some
> circuit diagrams etc.  Right now I have about 30 days before the snow shuts
> me down, I want to get some data during that time.  I am also concerned how
> long the injectors will last.  I ran straight water tonight.  After the
> leaks are all resolved, I plan to run 80% water & 20% methanol that has 1 oz
> of Klotz - Uplon fuel lube per gallon of methanol.  The Klotz is supposed to
> provide upper cylinder lube for alcohol fueled vehicles AND provide rust
> protection for the fuel system.  My only corrosion concerns are the
> injectors, pressure regulator and pressure sensor.  Everything else is
> stainless, rubber or plastic (boat fuel tank).
> 
> Its an EXPERIMENT, I'm having fun!  Worst part is I'll be traveling for work
> the next two days and won't get back to the project until Saturday AM.
> 
> Fire away!
> 
> Dan
> 
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