Had some time working on a newer version of SS15 SR turbo this weekend. Knowing the .64 might be restrictive up top, how ever I still want to keep it for its response, so I've grind down a larger exhaust wheel to suit the T28 bearing housing. Below is still the SS1.5 now running a much larger rear.
I have also bored out the internal gate to 36mm and used an large 38mm internal wastegate.
Its currently installed, response wise feel similar to the original version. How ever in upper top range it no longer feels like hitting a brick wall. I'm hopping to maintain the maximum compressor efficiency with lot less boost, while improve mid top range torque. Dyno tuning coming week hopefully.
Edited by HyperGear, 16 March 2014 - 08:54 PM.