If you are going for that much power your original idea of one nozzle per cylinder make since. The flow will be very high at high rpm and boost. Use only distilled water and methanol if you need to keep it from freezing. Just pring it on a little late and have an over capacity pump. Set up a kit for a quater mile 4 cylinder using two 0.9mm nozzles per running. The car runs on gas and 42psi boost for seven seconds or so at a time.
You could use one nozzle per runner for high boost and a variable flow at the inlet for the less than full power improvement.
There are so many combinations when you know the goal.

Definitely going to be running multiple jets - might as well be looking at each runner. Most likely going to be running multiple pumps or a lot of accumulation.

Hrm... Where does Aquamist have flow rate specs published?

There are listed at www.aquamist.co.uk Go to suppliers list. To the right of the price, in British pounds. Click on the little symbol and the flow ratings for different jet sizes will appear.

Oh wow. I didn't see that yesteday. 8) Looks like 6 .5mm nozzles and 3 HSVs. Eh, hrm, no pump specs?

From the same listing click on the < for the race pump. You would need an accumulator to reach the over 300cc flows keep in mind any duty cycles anticipated when considering jet fuel rates vs. the pump capacity.

http://www.aquamist.co.uk/sl/plist/p...2/jetrate3.GIF

This is the race pump flow then? I thought it was just a representation of how much could be passed thru a single nozzle. Why so low? Was it intended to be used without the HSV?

It is flow of the pump through the different jets. With the smaller jets you get to a point where additional pressure just will not flow more water - it is a jet restriction on flow. With the larger jets it becomes a pump capacity limitation as the jets have the ability to flow more water at higher pressures.

The chart is full on flow of the pump without metering by an HSV. HSV duty cycles change the profile.

For what you are doing you should run two race pumps and at least two accumulator. This should provide for full on for 30sec. The last thing you would want if water flow to slow down at high boost and rpm.

With goals as high as yours, you may need to spend more money to have a failsafe. The FiA2 can be rigged to turn off a boost controller or other device if blocked a blocked jet is detected. Invest in one per cylinder and drive high speed valves and wire up the safety cut off and you will have invested in some insurance for your probably expensive motor.

Philip Bradley