There is no name length limit

#+name: improvement-treatment
#+begin_src sh
  date
#+end_src

#+RESULTS: improvement-treatment
: Thu May 16 06:04:20 MDT 2013

Calling this block.
#+call: improvement-treatment()

#+RESULTS: improvement-treatment()
: Thu May 16 06:04:36 MDT 2013

and even longer

#+name: improvement-treatmenttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt
#+begin_src sh
  date
#+end_src

#+RESULTS: improvement-treatmenttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt
: Thu May 16 06:05:04 MDT 2013

Calling this longer block.
#+call: improvement-treatmenttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt()

#+RESULTS: improvement-treatmenttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttttt()
: Thu May 16 06:05:24 MDT 2013