This thread is great!! You should be able to safely run around a 100-125 shot without tearing things up as long as fuel and spark is right. Don't use platinum plugs, your injectors running at 65 psi is possibly correct, but has nothing to do with anything, it's the volume of fuel they can deliver that you are worried about, not the pressure. Honestly, a 50-60 shot on your car would be the equivalent of driving on a cold winter morning Try picking up a book or two on nitrous and how it works, you'll be miles ahead if you learn the basics instead of looking for advice from people laying a 225 shot to a 1.8 liter