@Dougal I did some tuning with the aneroid pin and star wheel, here is where I am at, the picture shows the pin travel on the aneroid pin marked with the red line, at ~22psi max, the pin stops traveling 1-2mm above the taper. Note I also have the pin rotated to the most aggressive profile. I feel my fuel is pretty much maxed, I have the idle set screw all the way out and my idle is at 900, which is on the high side, i tried adding more fuel then that and I dont feel any diff in power, the idle just goes up. EGT's are way safe 900-1000 at WOT, and no noticeable smoke
Based on the stopping point on the aneroid pin it needs to travel further down the skinniest part to have max fuel delivery correct? I have the star wheel adjusted all the way down, i.e. least amount of preload possible with these results. So I am getting max fuel only at the peak boost, and not through more of the boost range. So if I am understanding this correctly, I either need more boost to force the pin down sooner, or grind the ramp part of the pin to give it more skinnier profile down lower on the pin? What about a softer spring?