So I've been doing some research and reading and want to know from some of you guys that are experts. I've seen people with HP 57mm turbos saying that they have switched from .48 A/R housings to the .63 housings and have gained in the range from 40-60rwhp. Does this sound right to you guys? Also how much longer do you think it will take for the turbos to spool? Thanks for the help guys!