Juice instead of sugar

[TheChieftain]

Hello!
I'm making a perry from a Mangrove Jack's kit. I'm feeling a bit adventurous so I'm considering substituting the 1kg sugar to pear juice. What would happen if I do that? All I can think of myself is added pear flavour. Equal ammount of succrose and fructose should ferment the same. Or am I missing something, like if it would turn out like unblended concentrate or something?

 

[madscientist451]

The kit has a pear concentrate and you add water and sugar? If so, when you add your pear juice, subtract an equal amount of the added water. You can calculate how much sugar to omit if you take a gravity reading of your added juice or if its a commercial product, it should indicate how many grams/liter of sugar the juice contains. Note that you'll still have to add some of the sugar to hit your target ABV.