once again another misconception bro
AR50 is a housing only :D , see the pic below
in other words , it cant range from 200hp up to 500-600hp
wht specs do u wish to buy ? t3 ? t4 turbine housing ?
.48 , .63 housing ?
t310 turbine wheel ?
t350 turbine wheel ?
compressor wheel , 46trim , 50trim , 54trim , 60trim , 60-1 ?
48mm , 52mm , 54mm , 56mm , 59mm ? got sooooooo many types bro
cant tell hw fast it will spool
a AR50 50trim .63 t3 turbine t310 might get fullboost at 4200rpm
a AR50 50trim .48 t3 turbine t310 might get fullboost at 3800rpm
a AR50 50trim .63 t3 turbine t350 might get fullboost at 4500rpm
a AR50 50trim .48 t3 turbine t310 might get fullboost at 3800rpm but it might hurt ur top end power and have a power drop by 6krpm
so , by ar50 , cant really tell anything bro :)
i guess u research abit bout turbo n learn bit , sure very interesting to read n learn , then u can understand wht im trying to say
ur question is similar to , td06 on vr4 how fast spool
ahak , see td06 got td06 20h , td06h 20g , td06sl2 20g , got td06h-25g
then got turbine housing 7cm housing , 8cm housing , 10cm housing , 12cm , etc
huhuhuhu too many factors :D