I had the 255lph hp and my fuel pressure was at 38 psi at idle, with stock injectors, and then with 450cc's it stayed at 38psi.

I only mentioned hondata cause I don't know enough about crome or uber to say what they can or can't do, I have only ever used hondata, but it does everything I could want plus some.

If you use an ems like hondata, you don't need to get an aftermarket fpr so the worries about regulating them below 60 psi is null. but if you go with a piggy back (DON'T) then you may need the fpr. ( again I do not reccommend a piggy back controller). especially if your going to spray, spend the money now and not on rebuilding the motor when it blows.