yeah...bigger turbo is what is needed. how big are the banks coming into that junction at the turbo? 2.5" each side?
bigger turbos also mean optimizing downpipe size. You can put a 76mm hotside on a 3" downpipe...but I'd bet it would improve a bit if it's on the 'island' with a 3.5" downpipe.
2014 GMC CC Z71, 2009 C6 vette (672/639 at the wheel and less than 3300lbs)
2010 Camaro 2ss/rs---SOLD 4/15/14
-654whp with a few cosmetic things, Pfadt suspension, Vortech, CircleD, GPI ss3 vvt bump stick, gears, stuff in between,18" TSW N'rings for drag duty, 20" Forgestar F14s for street.
rhino@ Gwatney Chevrolet/GPI Jacksonville AR
TCAudio in Benton AR