As Anthony said, it's best to remove the compressor cover and measure the inducer and exducer of the compressor wheel. The inducer will tell you the general size of the turbo. To me, it looks like a, no offense, but a China copy of a Garrett style journal bearing, old school T3 turbo that would typically be used on a Ford 2.3L turbo SVO from "85 - "86. That turbine housing is a T3 4-bolt inlet and a 5-bolt Ford downpipe flange discharge with wastegate hole. Technically it would bolt right up on a "86 SVO Mustang or "86 Merkur XR4Ti.
You can do the same measuring of the turbine wheel as well. Just unbolt the turbine housing and measure the inducer and exducer of the turbine wheel. Best to spray it with PB Blaster and let it sit for a few hours before unbolting rusty turbine housing bolts. Inducer and exducers are reversed on compressor wheel and turbine wheel. This image should help show you the differences.
From there, you can use our old chart above that Anthony posted to determine which turbine wheel it has and give you a close idea of what compressor wheel it has. Just use Google's conversion calculator to convert MM to inches. Also, CHRA = center housing rotating assembly, or the center cartridge. Journal bearing and ball bearing are the two types of bearing systems when describing a CHRA. And that's definitely a journal bearing unit.
It kinda looks like a 48mm inducer compressor wheel, but that's just my best Jedi guess.
Hope this helps.
Patrick
