[quote="Richard L"][quote="JohnA"]I see that the AFR at high revs hovers around 11:1
Have you tried to go leaner? I got most of the gains when being leaner than 12:1, all other factors being the same.
Richard,
Of course it will vary the amount of fuel and water being injected, but on my personal car toggling the WI on and off results in about a 0.04 increase in lambda (~0.6 A/F), and I'm running nowhere near 20% water/fuel.
WI appears to have a significant impact on lambda readings. I mention this only to point out that the Skyline may not be running as rich as it may first appear.
It would be interesting if you could perform a similar test to gather some data on the WI/ effect on lambda readings for comparison.
Mike
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