very interesting chart!
Two things stand out in my opinion:
1. the largest nozzle produced post-ic temps the same as no WI! The smallest nozzle had the best results here.
2. as nozzle size goes up, the difference between pre and post-ic temps is squeezed. I believe this to be because we are compromising the ic efficiency (which is max when temp difference is max)
I look forward to hearing the comments of others, as we are a bit in unchartered waters here.
[Gelf mate, if you have a website, can you give me the address, so I can reference it from my Water Injection page.]