Would Water Injection be of any benefit running 10psi boost

[macka'sxr6t]

Hi guys I'm new to this forum and have already found some useful info.
I live in Australia and have bought a my first turbo car. its a Ford Xr6turbo. 4.0lt DOHC VCT The Turbo used on this car is good for 600hp.

Standard from manufacture it produces 240kw at the flywheel. I have since made some modifications that have brough this figure up to 300 Kw approx 240 rwkw.
running 10psi boost. on 95ROn Octane Australian

My question is would water injection be of any benefit to me running this amount of boost or would it be better to go for a bigger IC. Factory IC is at it's or very close to flow limit.

I would eventually like to run 17 psi or higher.