I have an HY35 with a 9cm housing and I feel it is a bit small. it has an internal waste gate that I have locked shut as i'm using an external 38 mm.
my thoughts are: What if I open the internal gate a bit to allow more exhaust gas to run around the turbine? in theory should be similar to running a larger housing should it not?
please don't tell me to get a new turbo lol I like trying different things