ScubaLawyer wrote: ↑Thu Jun 07, 2018 12:50 am
Thanks Bill,
I got it up to 132 IP. Seems to be about the best I can do sans an additional shim or two - which I do not presently have. Hopefully that is sufficient?
UPDATE: After futzing with it some more it now locks up at 139.
What did you do to get it to 139? Did you take out the "adjustment" spring and screw? They are really not usually needed, and seems like they are just there to allow lowering the IP. Anyway, they were a late addition to the Calypso and Calypso-J, and thousands were produced without them. The reg should perform well at that pressure, and if the second stage is finely tuned you may get cracking effort between 1.0 and 1.2 in air, probably easier in the water. I would have no qualms about going to IP of 145 or a little more if needed to get it where it feels right.
There may be some shims in Texas. Also Silicone 2nd stage diaphragms and misc. other items for Calypsos.
BTW, the only confirmed malfunction I ever heard of on those first stages were caused by the HP seat moving out of position and blocking airflow into and through the piston to the hose. That was extremely rare as far I can tell (maybe one, and that was probably due to an old oring around the seat getting compressed with age and letting the seat move easily). Problem was handily solved by the castellated brass bushing that goes over the seat.