Well now you added a few things to your post, you dont need a afpr. Your still on the stock fuel system besides that right? Im running a 255lph and 1000cc injectors on the stock FPR.
Also why do you have a aftermarket blowoff? Once again Im running 20-24psi on the stock one. I hope its recirculated also or your gonna run lean/knock. I know the sound is just OMFGLOLRICER great and all.
I honestly dont know what you can run, that was just a ballpark. Get in the 14s and prove me wrong, you can obviously beat the GS but the charger will destroy you. The reason you are getting fuel cut is because 14psi is pushing the stock fuel system too much.