That is way too much fuel pressure. Most "wet" carb nitrous system are rated for between 5 and 6.5 lbs FP. and you want it steady the whole run.
It is possible to run 14 psi FP, but you will need to run a much smaller fuel jet.
If running 5psi fp, 950 n2o pres, for 125 hp you would need approx .053 nitrous jet and .051 fuel jet. if you increase fuel pressure to 14psi, you would need a .040 fuel jet.
Time to do a little more studying on nitrous systems.