Well with the old ECU, auto and stock AFM I was making around 255rwkw.
Then I did a manual conversion and put a pfc and Z32 AFM in. Tuned on a dyno that seems quite happy it made 300rwkw. This was at 11.8 A/F ratios I'm told.
Tried to run it on a dyno I knew and it ran 225rwkw, pinging and rich as feck. Didn't get too close to redline cos of the pinging.
Cubes - is that standard turbo but RB30?
Fuel is new and fine. 3 types tried.
I don't think there are any air leaks but I will check tonight.
The pinging doesn't seem to happen with heavy boost low to mid rpm, more like any boost high rpm, like over 5000.
My theory at this stage is, AFM tells PFC there is much more air than there really is, PFC puts lots of timing and lots of fuel in.
The only other thing I can think of is that the lambda sensor used to tune it was out and something is wrong with the tune although that wouldn't account for the pinging since it wasn't pinging at all when it was being tuned and on my test drive (and I gave it a good quality test drive).