I theorized that it screws with the load calculations (advancing ignition timing at part throttle) and that perhaps it causes more fuel to be sprayed at throttle tip-in (which could possibly cause a lean condition at WOT due the ECU's LTFT adjustments).
I did this mod just for the hell of it (before I pulled the secondaries). In fact, I set the damn thing for about 1.05 volts at idle, just because I could. It sure did change the shift points of my ATX.... it no longer upshifts early when I want to ride 3rd up to 55-60mph during light driving (for me). Throttle response seemed to have improved a little, but it could have just been the nice weather. I was going to switch it back to something below 1V (it was .92), but I think I'm going to leave it as it is... at least for a little while longer.
