I just kegged my second batch of the CYBI Arrogant Bastard Clone (90% 2-Row, 10% Special B). The first batch turned out really well and scored a 38 in competition. No problems with that batch. The second batch has been in the keg for a week. I pulled a bit off last night just to see how it's carbing up and when I tatsed it I got lots of banana aroma and flavor.
I did some checking and it looks like the fruity estery flavors come from warmer fermentation temperatures or under pitching yeast. Heres where I have questions.
I have a controlled fermentation chamber. I made a starter going by mrmalty.com. I pitched my yeast at about 65 degrees and over the course of a week and a half slowly ramped the temperature up to 70, where I left it for 4 weeks in the primary. Crash cooled to 38 for 4 days, racked to keg where it's been under 11 PSI at 38 degrees.
Like I said in the beginning, the first batch turned out great. Second batch, same process and bananas. The only difference between the two batches was that the first batch had massive fermentation and blow off where the second seemed very quiet. I never needed the blow of tube at all. I got about 78-80% attenuation from both batches so my gravity numbers were fine.
Has anyone had any experience like this or can any of you guys help me figure out what went wrong. Is this something that will mellow out with time?
Any ideas??
I did some checking and it looks like the fruity estery flavors come from warmer fermentation temperatures or under pitching yeast. Heres where I have questions.
I have a controlled fermentation chamber. I made a starter going by mrmalty.com. I pitched my yeast at about 65 degrees and over the course of a week and a half slowly ramped the temperature up to 70, where I left it for 4 weeks in the primary. Crash cooled to 38 for 4 days, racked to keg where it's been under 11 PSI at 38 degrees.
Like I said in the beginning, the first batch turned out great. Second batch, same process and bananas. The only difference between the two batches was that the first batch had massive fermentation and blow off where the second seemed very quiet. I never needed the blow of tube at all. I got about 78-80% attenuation from both batches so my gravity numbers were fine.
Has anyone had any experience like this or can any of you guys help me figure out what went wrong. Is this something that will mellow out with time?
Any ideas??