2 stroke Water injection

[Mike Fahrion]

OK - here's a little different twist on the topic of water injection.

I'm in the early phases (meaning more thinking than doing for another 
month or so) of a water injection project for 2 stroke motorcycles.

Here, water is injected into the expansion chamber to use temp to 
tune frequency response over a much wider range.  The resulting 
gain in midrange power is dramatic, 30% is very realistic (measured 
30% gain on a 500cc 4cyl at 7700 rpm).

One big issue is how to inject a mist of water (vaporize quickly) as 
opposed to a stream, which had about a 300 ms lag before bringing 
peak power.  How to do this at very low cost?  Ideal would be a fuel 
injector and electric (fuel?) pump.  Must be very small and low 
power (not sure how low yet).  My gut feel is 20-30 psi would be 
fine.  The "reference standard" I'm comparing cost and size against 
is a windshield washer pump through a carb jet.  This gives a low 
power, small, cheap 5 psi pump.

Could a FI withstand 400+ degrees C?

Any thoughts appreciated

-mike
mfahrion at bb-elec.com