I have a little over 24 hours to get a keg reasonably carbed. It doesn’t have to be perfect because this is just for a buddy to have a sample while the beer develops.
Be careful shaking high pressures. If you absolutely need it carb, shake at high pressure briefly, the lower to serving pressure and shake until the regulator stops making noise.
24 hours @ 40psi/38F ( I wouldn’t go over that) should have the beer mostly carbed, at least well enough to let you eval the beer. Most regulators have a PRV that will only let you pressurize so high before venting anyway. Ask me how I know…
Ok, for 48 hrs, I leave it at 30psi/40F. That gets it close, then I drop down to serving pressure. As for the 24 hour plan, 40psi won’t vent the regulator but I do know that some regulators will let you go higher. 30psi x 2 days or 40psi-ish X 1 day would be safest. Or the shake method which I’m not a huge fan of.
I had done “set and forget” for my first three kegging experiences (I tried shaking the first one and it just seemed awkward), but this time tried 20 degrees psi for 2 days, then turned it down to 10 psi. The only drawback was that the keg hadn’t cleared as much as it would have if I had ignored it for a week. But it’s a 2.5gal keg and it was really carbed up by the first day.
Thanks for the help all. I got it reasonably carbed up but the the hop character is extremely pungent right now from the keg hops. It was necessary to rush but no harm done.