Vacuum based water/alcohol Injection Questions

Jeff.Saunders wrote: You MUST make sure you check the level each time you ride. If you tune with the assumption you have the water/alcohol spray AND you run out, you are likely to trash some pistons....

turboking wrote: QUOTE: I think that's what I have its cast piece that matches the super charger. I didn't think there were check valves or jets in those brass fittings? I was thinking of adding a filter and a valve. How long does that little tank's fluid last because I though of adding a secondary reservoir too. :dry:

the system has to have a jet system and anti siphon valves or it's like opening a dam :blink: ....... how long will the supply last ? it depends on your H2o jetting and how long your boost times are...... :S

R.C. engineering, Blake ,RB racing, ATP, Mr.turbo all sold H2O injection for their turbo kits . :huh: they were all boost pressure powered with check valves and jets...... :huh: most used a small aluminum reservoir that fit in front of the m/c license plate.
On my MK II custom set up I use a one quart reservoir .....at this time my H2O injection starts working at 8 p.s.i. .... :side: the indicator light on the dash lets me know if its working or not.....I can adjust the low (on) and high (off) p.s.i.sequence and I also have a bypass so I can squirt at will if needed ....... errrr ,sounds dirty , lol

zed1015 wrote:

Hollywoodmx wrote: I think that's what I have its cast piece that matches the super charger. I didn't think there were check valves or jets in those brass fittings?
Hey Zed do you remember what boost pulliesI have I have the 3 sets running the middle set..

Yes! the cast item is the Drouin made tank, there should be an inline spring loaded one way valve either side of the tank - one on the pressure line from the plenum and another in the fluid line to the nozzle.
I have never had a Drouin injection set up so I don't know what the valves he used look like so maybe someone has messed about with your and fitted different fittings.
As for the pulleys, running anything other than the std z900 pistons makes the std Drouin pulley ratio to boost pressure comparison useless.
With the std 900 pistons and std 9-1, ish comp the first set of pulleys would give around 6 to 8 psi but with my 8-1 comp, 1075cc set up they gave no boost but just took the load off the engine.
I have had to fit the second set which spins the blower faster to fill the extra capacity and get + boost.
You will have to run the bike and see what boost you get with your engine spec and go from there.

zed1015 wrote: Those pulleys were listed as 8 to 10 - 10 to 18 and 18 to 22 psi but in actual use never gave that much boost.
With the first set you were lucky to get 6psi .
All this was based on just bolting the kit to a std z900 engine so with anything bigger you will have even less boost so you will need to experiment with the bigger sets.
As for the one way valves, I only have the Drouin sales leaflet which doesn't have any pics of the valves but they should be attached to the actual cast tank as far as I can tell.