fps to psi conversion???

there is no conversion since it depends on your air seal, barrel length, barrel diameter and i am sure i am forgetting one thing at least. What is your setup?

kjw m700, hpa rig, it has yet to be upgraded.

Too many variables to give an answer. Tune it at a site with a chrono.

Ok no prob

as an example my G&G L96 with a 650mm 6.01 barrel hits 550 fps with a .2 at just under 70 PSI.

Ok so that gives me a good base to work off if i had the same psi i would probably get about 500 fps assuming that internal upgrades and the tight bore would have a large affect on my fps. thank you solarisjock very much for putting up with my random info lol