.88 to .91 ext housing differences?

[Jamesmoore554]

Trying to gain more knowledge on turbos... I have a 63/68/.88 and was told a .91 ext housing would flow way better. Anyone have any input on this. Also into consideration i may build a compound setup with a s480 in future. Thanks

 

[95cummins5.9]

Trying to gain more knowledge on turbos... I have a 63/68/.88 and was told a .91 ext housing would flow way better. Anyone have any input on this. Also into consideration i may build a compound setup with a s480 in future. Thanks

.91 IS divided and the .88 is undivided. I don't know if they make a .91 gated housing but barder turbo can get you a .83 gated housing for future compound use. I run a .83 non gated on the same charger and its a blast to drive with 5x14s and some tuning.