Originally Posted by Gunfighter04
Why did you set to 30PSI? at a temp of 7 C you've now got about a 3.8 Volume, That's all the way at the top end of the scale. Personally I think you should be closer to 2
Not with 75:25 beergas. With 75:25 beergas you only get 25% of the total pressure as CO2; so at 30 psi beer gas you're really only carbing at 7.5 psi (25% of 30 psi) with the remaining 22.5 psi being as nitrogen.
I'm also a nitro noob but my guess is that there wasn't any nitrogen dissolved in the beer when you first hooked it up. Now that some nitrogen has dissolved, when it passes through the restrictor disk it knocks virtually all nitrogen out of solution so you get a bunch of foam. Nitrogen is about 100x less soluble in beer than CO2 but there is still some in there. Maybe try turning down the pressure just to see if you can get an acceptable pour.
I also found that it can be difficult to dial the whole thing when you have Russian Imperial Stouts on nitro. A couple of pours and you're