What I find is that in most cases...regardless of what size turbo they're running...the guys run about 20 lbs of boost...and leave it at that. Very few max a turbo out...for whatever reason. You really have to be a G Force junkie to pound 28-30 PSI through the new turbos that are out there today. I've run 28 PSI through my 6262 and gone 6.90 in the 1/8th on 28 PSI with mostly bolt on junk, stock bottom end, a used AC convertor, tuning with NB and Erics 5.7 chip. I'd expect someone with better parts than I have and better tuning skill to run a low 10 or touch the 9's with the 6466.