I have a Turbonetics t3/t4, with a .48 turbine and .60 compressor.
How difficult is to modify the turbine to make it something like .60 or .63 ?
I was told that just have to change the housing.

 

Buy a .63 turbine housing from Turbonetic's or exchange your housing for a .63 A/R housing with Turbonetic's. I have switched back and forth from .48 A/R to .63 A/R a couple times with a Precision turbocharger.

 

When rebuilding the turbo after swapping out your housings, just make sure to replace the o-rings....... sometimes the compression/decompression can cause a bad seal...... you can get these from turbonetics etc....... in some cases you may not even have to mess with removing them.......

 

So, the wheel remains the same, right?