Let's see what we've got here...
Best temps at turbo exit were with 0.6 + 0.9
Best temps at intercooler exit were
without WI. Less offensive was the 0.4mm jet. Hmmm....
Best temps at throttle were with 0.9, twin 0.8 or twin 0.9 (lots of water then)
Another interesting figure is the temp difference between throttle and ambient - shows the overall cooling effect, after the reduced i/c efficiency is factored in:
WI off..........20-40C
0.4...............5-30C
0.5...............0-30C
0.6...............0-30C
0.7...............0-20C
0.8...............0-10C
0.9...............0-5C
0.4+0.5........0-15C
0.5 + 0.6......0-20C
0.6 + 0.7......0-15C
0.7 x2..........0-15C
0.8 x2..........less than 0-10C
0.9 x2..........less than 0-10C
So there is a distinct improvement everywhere by at least 10C.
The pattern is not clear though, being best at 0.9 and 0.9x2 but not in between. :?
Clearly this is not a comprehensive test, since it was only done at 10psi and not 13-14psi where it might have been a different story.
We also have no clue as to the total effect on power, since the extra water going in the cylinders will play a major role in lowering in-cylinder temps, perhaps even lowering EGTs to levels unacceptably low.
In an ideal world we would have these runs on a RR, where we could see the power tailing off due to excess water (and adjust accordingly)
...but for DIY datalogging it's
excellent!
well done mate!