Kegging and serving soda

[Ozwald]

Yeah, for that much pressure, you'll need a longer line. However, when you're using too short of a line, CO2 tends to get driven out of solution in the line & you'll pour nothing but foam. Increase the pressure, increase the length of line. My guess, with a cobra tap, is you'll need something in the 6-7' range when you're at full carbonation. I'd still start with ~10' lines & trim back in case they need to be longer than that, but first get the pressure up with a carbonation chart/calc.

[CRBrewHound]

I'm making some soda stream root beer tonight. Even though I shook the shit out of it, carbonation seemed to get better sitting for a day.

Yeah, you really have to shake it a lot, I usually come back and shake it up several times.

[captain carrot]

From Drew Beechums article in Zymurgy this month.

"On the kegging side we'll use about 30 psi @ 35 deg F to achieve 4.5 volumes of Co2. Go for 8 feet in a serving line or prepare for a very spritzy pour.
To force carbonate set your regulator for 35 psi, hook onto the gas fitting , lay the keg on it's, and rock for 10 miutes."

I'm going to make up some longer cobra tap setups for the diet cola and a hard ginger ale.
Is headspace is going to be a factor when force carbonating?
The Sodastream sodas are 3 gallon in a 5 gallon corny.
My ginger ale is 4 gallon in the same.
Thanks in advance!