This thread may be dead, but I thought I'd throw it out there as I'm noticing at least 3 rotorheads here now.
My update: I hit the dyno last week, put down 325 rwhp @ 7200 RPM. The torque curve was nice and flat and I reached my near peak torque very early on. Fuel injector duty cycles were around 93%, I have 4 850 cc injectors. Water Injection came on just after 10 lbs of boost, my peak boost level was .91 or about 13.5 psi. Air Fuel was pig rich all the way through redline. At peak rwhp on my 4th run, A/F was 10.5/1 NO higher than 10.8 to 1. I did have a boost leak at the elbow and the IC. I'm using the stock solenoid and my engine management to control boost.
I still didn't notice any air intake temps drop. I THINK this is because:
I'm running sequential turbos with a 12-8-13.5 pattern, transition occurs around 4200 RPM. Water comes on, goes off, then comes on through redline.
Also I am using the stock sensor which is SLOW and the manifold probably heatsoaks.
Should I notice a dramatic decrease in intake temps while running WI?
A second question, how lean can I SAFELY go without detonation?
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