Yeah most likely your IDCs with those injectors are too low for the HSV to be effective with that size WI jet - especially if you are taking advantage of being able to lean further with water injection than without. The 1.0 may not be enough, you may need to run two 0.6 jets.
What is your HP? Do you have the ability to control fuel and timing?
What is your current max IDCs? What is your AFR at that point?
Going to a static flow will provide enough water for you at the high end but will likely bog you down lower. Static flow is only good over a small range below that you are running too much water and above it you are running to little.
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