that will surge to fuck with a T4 compressor and .48 exhaust at any kind of proper boost which will do the opposite of what you want, as the boost will probably need to be set to not boost more than about 1bar until high revs so the engine can consume the air the T4 compressor will be trying to feed it

its one thing building turbos, its another thing

"T38s" which are T4 comp and i think an esc cos .63 housing are known to surge like a bitch on most specs cause its a total missmatch, .48 housing will be far worse

be interesting to see how it goes tho...