I'm experimenting with a cab sauv from a higher end 6 week juice/concentrate kit. Starting SG was 1.082, which will give me just over 11% alc.
I decided to do a no-no and push the envelope. I chaptalized with 15 oz of sugar to bring the SG to 1.090 which, if successful, will ferment to a potential alcohol of 12.2%
Even so, this has been tried a million times before by others and many (most) experience a stuck fermentation (but I'm hoping it's only because they dump and run). Of course, I know the real reason why. You're not supposed to mess with balanced kits, etc. I know, I know. But I need to see it fail with my own eyes. (I'm ready to take a minor financial hit if the kit crashes).
I've added 5 g of DAP at yeast innoculation. Maybe that will see it through. Maybe it's overkill. Maybe it really doesn't matter. I don't know.
Has anyone tried this, successfully? I've heard some have pulled it off, but I don't know the details.
Kit manufacturers discourage it...for marketing and promotional reasons. AND, why fix what isn't broken?
I just want to see if I can push the kit to 12% alc.
Feedback?
Jeff