Toshiba DVD-ROM ripping speed?

hi

i want to know if there is any hack to these drives so they can read more faster than 2x ??

i have 1512 and 1612 and after i make them region free , i read the original DVDs at 2x and the copy DVD from (asia ) read from 4x ~ 12.7x !!!

so what can i do cause 2x is real slow…

and why the copy dvds is faster even they are Dual layer !! ?? is it the Microvision protection !!

thanks…