you'd be better off not bothering with abs and using pet-g.
Much better layer adherence and generally stronger all round than abs.
Plus much better to print with.

The thing with abs is that unless you keep the entire model at around 60c until your model is finished and then cool it down gradually, the layer strength will be crap. Because it' designed for injection moulding, it shrinks quite a lot (to make it easy top remove from the moulds), and unless you keep the whole model the same temp and quite a high temp, each layer will shrink slightly all by itself, destroying the inter layer bonds.

Basically it's damn near useless for fdm unless you have a very good print volume heater.