Force carbonation

[jarvo]

Ok so i got my co2 system set up for my lager and i have put 20psi in the corny.Its been sitting in the shed now for a couple of weeks so decided to try some and it was'nt to bad but needs more carbonation so i stuck another 20psi on it and gonna leave it a couple more weeks.

Now i just bought my mixed gas 70/30 bottle and regulator for my stout and ordered 2 more cornies from norm. but i know from reading up a little that to force carbonate using mixed gas you need to use higher pressure for it to absorb into the beer.
My question is how high?
I plan on keeping it down the shed (around 16c) for about four weeks unless i manage to get another fridge first and then it will go in there (around 5c) :whistle:

 

[Aleman]

70/30 needs 2.5 times the pressure that CO2 alone does so 20psi on CO2 is about 50 psi on 70/30 . . . for the same temperature . . . and to deliver the same carbonation at that pressure

 

[markp]

Does anyone know of a calculator where you can work out the time and pressure needed to produce a particular carbonation level at a particular temperature??

Or can anyone explain the formulaes that are used or suggest a book I can read on carbonation??

Thanks

 

[jarvo]

Thanks Aleman i'll stick 50psi on it and check carbonation after 2 weeks. :thumb:

 

[Aleman]

Just remember that you will need to increase the line length to dispense in order to prevent excessive fobbing

 

[jarvo]

Just remember that you will need to increase the line length to dispense in order to prevent excessive fobbing

Yea been thinking about that one been looking at these flow controlers do you think it'd do the job?
http://cgi.ebay.co.uk/Liquid-Flow-Contr ... 29f89d2a1a

 

[Aleman]

Forcing carbonated beer through a restricted opening will induce fobbing . .. you need the right length of the right diameter line to drop the pressure at the tap . . . you can use a flow control tab to tweak the balance, not provide it.

 

[jarvo]

Ah got you so if i start with lets say 10ft of 3/16 hose and cut some off bit at a time untill i get my perfect pour :drink: :