hello again guys, i have two important question to make you, so i would be glad if anyone know some things

1. what is the max fuel pressure that we can rise? i have a walbro 255lt fuel pump and stock injectors (iw055)

2. the second question is about remaping. does anyone change the WOT enrichment. i read some things tha i found here http://www.berlinasportivo.com/pages/hexmaps.php#WOT

please reply to me
thanks