[EFI] Source for high pressure 12v water pump

[Matt Henson]

I've played around with the shur-flo pump for WI.  I
think that the pressure rating has more to do with the
shut-off switch than the pump itself.  I found that
the pump I used (thought it was 80psi.. it's the
higher psi one from Northern Tool).  The maximum
pressure of the pump was > 200PSI if I bypassed the
pressure switch.  I don't know how long it would last
at that pressure but I tested it at 175PSI for about 3
hours without a leak or failure.  At 12 seconds a shot
that's a lotta runs before the pump goes kaput.. Also,
using the Aquamist nozzel, I couldn't see any
significant vaporization improvment above about 60PSI.
 Mostly it just dumps more water with higher pressure.
 

I set my system up to recirculate the water, just like
a fuel injection system.  I modulated the water pulse
width to match RPM and boost so that I got more water
with more power.  I suppose that it would have been
simpler to use manifold pressure to bias the water
pressure, eliminating that requirement from the
control system.  Anyway, it all looked pretty good but
I never put it into use.  Decided to just fix the
poorly designed turbo system instead of patching it
with WI.  Maybe if I spent more time at the 1/4 mile
track WI would be more appealing..

-Matt
'95 M3 Turbo

-Matt



--- Daniel Houlton <houlster at user1.inficad.com> wrote:
> 
> Here ya go:
> 
> Shurflo 60 & 100 psi, 1.4 gpm pumps for $80.  You
> won't find
> the 100 psi pumps cheaper.
> 
> http://www.pro-spray.com/sprayer_pumps.htm
> 
> --Dan
> 
>
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