There are a couple things to consider. 1) A pump speed kit is not linear. I'm not sure about the AEM,. but another kit I just tested had the pump starting at 30%DC at the cut in point,7psi in your case. Then at 50% signal they are spraying 70%. With the pump already starting at 30%, you are already behind the curve.

2) Now reality. These pumps can push up to 1600-1800cc. When using a smaller jet such as an M6 (378CC rating at 100psi) You reach 90% for the spray at 50%DC on the pump. So what is happening is you essentially have a single stage system with a variable controller forgoing some consistency. Thta's not to say it won't work, you just have to know it's limitations.

What PSI is the pump rated for? You may have to re-adjust the jetting based on the performance of the system.

Do you have AFR and logged timing curves for the dyno run? Do you know what the max timing is for the open loop run?