After a hectic weekend, I have finally have a moment to scan the dyno chart of the dyno test on Skyline. The dyno plot was done on the afternoon before race.
Due to race regulation on the class, we could only run "pump fuel" so we filled the car up texico Super-unleaded -98 ron, straight fromn the pump.
We managed to get about 600 whp without any water, you can see the chart below (base.jpg):
The next thing we did was switch in the pre-turbo injection, a 0.3mm jet was placed in front of each trubo.
We immediate see the change of a/f ratio at 4250rpm - where the water is activated - the water rate
is proportional to the fuel injector's duty cycle. (system2d). 100% water was used.
Probably need someone to chime in to give some suggestion as to what was happening. At the sametime, a slightest knock was registered.
Here is a superimposed image of base (faint orange) + Pre-turbo only (full colour)
I will resize the others as soon as I have time:
1) port injection only chart
2) pre-turbo+port injection.
3) superimposed - chart of the above (two off)
4) pre-turbo+ Port injection with 50% methanol
5) superimosed of the above against base
Richard