I may be going about it wrong but in the short time I have been printing the best indicator of temp is to print something that is thin wall with no infill 1-2 layers thick then break it and check for layer adhesion. It shouldn't just break clean when you pull it apart. I have to print ABS @245 to 250 to get good layer adhesion, I have tried all the way down to like 225. A good part to test this on would be the clips for the corner of the bed that I sent you, if they are too cold they will split apart when you try to clip them on the corners of your bed. Here is where I got the STL file for those
http://www.thingiverse.com/thing:575489/#files
The gcode I sent you was for four of the small radius clips and I believe I had to run them at 250° for good adhesion. I also included the STL file for it.