Need help with temporary Ghetto fix
 

So, my FD has been plagued by horrible compressor surge since 2008.
the turbo is some hybrid ebayish T61 knock off ( T61 TURBO" garrett internals with t4 flange, 4" inch intake and 2.5" inch outlet . turbo has an a/r of 68 and a compressor wheel and trim of 68mm plus mates up with a .84 rear turbo housing )
it has worked well, producing 400hp at 15psi, it comes online pretty hard (full boost at 4k)
but the problem is the surge, it drives me mad. if i floor it below 4k, it surges its ass of, same goes for any kind of partial throttle.
i will be swapping the turbo out next year for either the GT4082 i have on my living room table, or a a GTX37.
What i wanna do now is fix/improve on my current setup just to get me through this season.
i haven't found any anti surge covers for this turbo (since im not 100% sure of what its a knockoff off) so what im thinking of is a DIY anitisurge. i have access to a metal shop at work, so i can get the work done properly. something in the lines of the ones in the picture.
is this an easy job? will it work properly? (is there anyone that ports shrouds for a pretty penny? )
any help is appreciated

just measure your compressor wheel inducer/exducer (and probably more things that i'm not aware of) and buy an anti-surge housing for that compressor wheel...

i would assume it's a pretty standard cast T4 compressor wheel. someone's gotta make a housing for it.

no?


also, it wouldnt be as easy as drilling holes for air to re-route. my anti-surge housing (precision, looks like the first one you posted) seems to have a pretty delicate slope where the air goes around, near the bottom of the holes. the air comes back in where that "ring" is, down at the bottom of the inlet in that first picture.

can any of the forum turbo vendors weigh in on this? i will buy a cover if it is possible

bump

So. i have dismantled and measured everything on this turbo.
The compressor turbine is 91mm on the bottom and 69mm on top.

more

so. what im thinking is that this is similar to a TO4E or a garret T61
will any T61 4" in 2.5" out compressor cover fit? if its for the right turbine trim?
help me out here, need to cure that compressor surge