not sure that is a good idea (IMO), you'll affect spool rate if it is too low.
At lower revs, you want two things
1) keep the req boost low enough to prevent positive deviation.
2) keep the req boost high enough to prevent the PID from cutting WGDC from 100% during spool on WOT
If you can't do both, you may have to tweak a few other maps
http://nefariousmotorsports.com/forum/index.php?topic=871.0title=