I know consistency across each cylinder is an indicator for a particular bore being an issue, ideally just wanted to get an idea of normal leakage figures as what may be normal for one model of engine may be a bit on the high side for another if that makes sense.
I'm not carrying out the test myself a friend of mine who's a qualified tech of 15 years is doing it. He just asked I find out expected figures so he has an indication as to whether the results point to all being well or not.