480 hp project nozzle size

[GILES]

i am using a 1s system on a 480hp turbo application running approx 30psi max boost 2.3litre engine 80%water 20%methanol any thoughts on nozzle size before i take the car for mapping.
cheers.

[keithmac]

People normally size it off the peak fuel flow, 15% water to the injected petrol seems a good start. If you know the flow and peak dutycycle of your injectors you can work it out from there.