Well it's all just guess work at this stage as nobody had documented results anywhere as yet.but I'm leaning now more towards this setup over gtx2863
(I change my mind a lot)
they would both work just slightly different, remember the difference is supposed to be only 30hp per turbo in the proper off the shelf housings.
but we're not asking 400hp or 430hp from them either so don't worry too much.
only thing I see being an issue:
is "possibly" additional heat from smaller .42 housing from big psi like 30 psi plus which it may not get to? but considering how much more efficient that wheel is, it could well be more efficient than a -5 boosted to 2bar + in its .60 cover?
so maybe we can spare some efficiency here especially since I'm going E85 the natural cooling effect of this suites this type of setup.
now the benefits of the oem .42 cover:
it's gonna have response straight off the bottom like say -5 wheel in a . 42,
it won't outflow the turbine so no surge either basically same as a -5 but a comp wheel that shoots it's load into your pipework faster thanks to the .42 it even has the smaller inducer to suite the oem shitty intake snouts.
something to think about anyway.