Vacuum based water/alcohol Injection Questions

So my KZ has this set-up, it's basically a reservoir maybe (500ml) behind the supercharger with a fill cap and 2 vacuum lines.

I know very little about water injection. Anyone know much about a set-up like this? How much water will vacuum pull on and off boost? Do I need an in-line filter? Should I upgrade it in any way?

Mr Turbo used to sell a water meth injection kit.
It used a sealed container and boost pressure to "pump" contents into carb inlet under boost.
Check valve on boost line to top of tank.
Restricter in line from bottom of tank to carb inlet.

Think you have the std drouin set up.
The one way valves either side of the tank are set to activate at 5psi boost and the injection nozzle should be 0.6mm.
It's a simple but effective system.
Use good quality screen wash instead of plain distilled water as this contains methanol and will give an octane boost as well as fighting detonation.
You could upgrade to an electrical pumped system which will need a boost activated switch on the plenum and some experimentation with nozzles etc but unless you are after serious power and maybe doing some racing I wouldn't bother.

zed1015 wrote: Think you have the std drouin set up.
The one way valves either side of the tank are set to activate at 5psi boost and the injection nozzle should be 0.6mm.
It's a simple but effective system.
Use good quality screen wash instead of plain distilled water as this contains methanol and will give an octane boost as well as fighting detonation.
You could upgrade to an electrical pumped system which will need a boost activated switch on the plenum and some experimentation with nozzles etc but unless you are after serious power and maybe doing some racing I wouldn't bother.

What he means by screen wash we call Windshield Washer and Deicer fluid. You want the -20F only, it is blue and comes in gallon jugs. In an ideal situation, you can add HEET gas-line antifreeze & water remover (the yellow bottle only) to make a perfect 50% methanol/water mixture. The percentages are on-line so you can determine how much HEET to add per gallon. DO NOT use any other deicer fluids, they contain additives that are bad for the task. Do not use any other color than the blue fluid.
Best of luck.

koolaid_kid wrote:

zed1015 wrote: Think you have the std drouin set up.
The one way valves either side of the tank are set to activate at 5psi boost and the injection nozzle should be 0.6mm.
It's a simple but effective system.
Use good quality screen wash instead of plain distilled water as this contains methanol and will give an octane boost as well as fighting detonation.
You could upgrade to an electrical pumped system which will need a boost activated switch on the plenum and some experimentation with nozzles etc but unless you are after serious power and maybe doing some racing I wouldn't bother.

What he means by screen wash we call Windshield Washer and Deicer fluid. You want the -20F only, it is blue and comes in gallon jugs. In an ideal situation, you can add HEET gas-line antifreeze & water remover (the yellow bottle only) to make a perfect 50% methanol/water mixture. The percentages are on-line so you can determine how much HEET to add per gallon. DO NOT use any other deicer fluids, they contain additives that are bad for the task. Do not use any other color than the blue fluid.
Best of luck.

Yeah! should have mentioned only to use to blue stuff but blue is all we have over here as it never gets warm enough to use anything else

LOL. We have all sorts of colors; blue, pink, green, and probably others. Fortunately, the blue stuff is also the cheapest, as it is only a water/methanol mixture.
Where is "over here", if I may ask?

Over here is England, 99% of the time it's either wet or cold.

I understand. One of the times I was there, it was both. Still beautiful country.

zed1015 wrote: Think you have the std drouin set up.
The one way valves either side of the tank are set to activate at 5psi boost and the injection nozzle should be 0.6mm.
It's a simple but effective system.
Use good quality screen wash instead of plain distilled water as this contains methanol and will give an octane boost as well as fighting detonation.
You could upgrade to an electrical pumped system which will need a boost activated switch on the plenum and some experimentation with nozzles etc but unless you are after serious power and maybe doing some racing I wouldn't bother.

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. Hey Zed do you remember what boost pulliesI have I have the 3 sets running the middle set.

koolaid_kid wrote:

zed1015 wrote: Think you have the std drouin set up.
The one way valves either side of the tank are set to activate at 5psi boost and the injection nozzle should be 0.6mm.
It's a simple but effective system.
Use good quality screen wash instead of plain distilled water as this contains methanol and will give an octane boost as well as fighting detonation.
You could upgrade to an electrical pumped system which will need a boost activated switch on the plenum and some experimentation with nozzles etc but unless you are after serious power and maybe doing some racing I wouldn't bother.

What he means by screen wash we call Windshield Washer and Deicer fluid. You want the -20F only, it is blue and comes in gallon jugs. In an ideal situation, you can add HEET gas-line antifreeze & water remover (the yellow bottle only) to make a perfect 50% methanol/water mixture. The percentages are on-line so you can determine how much HEET to add per gallon. DO NOT use any other deicer fluids, they contain additives that are bad for the task. Do not use any other color than the blue fluid.
Best of luck.

I'm glad you clarified that cause I thought he meant windex..lol.

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

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....

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.