I am planning to make a high-gravity IPA, and am currently about to make the yeast starter. Based on a Wyeast table on pg 68 of How to Brew, I figure I should make about 2-3 qts of 1.040 OG starter wort starting with 100 bil. cells from a Wyeast packet.
My question is this: if I only have a 2000 mL (a little over 2 qt) flask for the starter, how do I go about making such a large amount of starter wort? Should I try to do 2 qts of wort all at once and attach a blow-off tube? Or should I make 1 qt wort, decant off the bad beer 24 hrs later, then add another qt of starter wort to the yeast slurry? Or is there another approach not mentioned above?
I've never made a starter this large, so any advice would be appreciated!