4-6 psi flowing pressure is just fine. And yes if you do go to a higher psi pump it would run better with a leaner fuel jet. That is something you would have to test and tune with to get the most power gain. Like doctor tubo said , pretty much all the selonoids are realiable it just happens, more when you have to much bottle pressure like you had. I bet if you purge it out and get it to about 900 psi it will probably work.

And for the record the edelbrock seloniods are great. Also make sure you purge all the n20 out when not running. (which I am sure you already know but I figured I would remind you). That will also cause a selonoid to not open or fail.

 

Amd gave you the exact same advice I would have so I won't be redundant.

 

when i tore my motor down to install the stage 2. i had 2 bent exhaust valves and a chipped valve seats.i wasnt running nos or acohol at the time.but running the r. wood cdi.i guess i over reved to much?