Originally Posted by wmazz Originally Posted by billman100 Have a 2.5n/s with a 115g spring so I should be at 19psi for pop-off. Looking for the jet sizes I should get. You still haven't said anything about the return line restrictor size? Did Riva have any recommendations for the high speed screw and low speed screw? I have never jetted based on pop-off. 19 psi is normal for your set-up, but over the years I have seen differences in gauges. First I recommend you try to insure the method you use to ...