^^^8psi is all I would do with a RRFPR. Anything more and your asking for trouble. My opinion is the 19# injectors will pin at very high fuel pressures and you will also kill your fuel pump.
Now I have heard of 1 or 2 people doing 15psi on a stock tune but count me out on that, I like my motor without the big window in the side.
1 second or two without fuel and it's all over quick, sounds like a garbage disposal with forks in it as you motor self destructs
