The system is capable of sprayiong ~1300cc/min with the standard valve (806-239B). We can supply a 806-239 valve for ~1600cc/min. It appears you need to run 4x 0.8mm jets + a little bit of head room for the 5th injector. Not a problem.
If ypu run twin valve, the system is capable of 2500cc/min. Requires larger hose ID between the tank and pump. 10mm ID will do nicely.
Here is a chart for the jet vs flow:
