look at this link for a photo. compressor inlet pictures as measured by my "CocaCola" ruler is approx 60mm across externally. probably 55-50ish inside
http://www.deviantart.com/view/4279147/
notice the 12 fin compressor wheel?, so you'd think it's a 14b, but it's a 16g according to the part number: 49178-01420, "RALLEY 1,8 MITSUBISHI TD05H-16G-7 49178-01420" TD05H-16G/7, rated at 505CFM, approx 400hp. now H is the turbine size or style and unrelated to the compressor right? what is a RALLEY?, some mitsubishi special i've never heard of?
this has been confusing me. how can my turbo be a 16g with a 12fin compressor wheel when mitsuwheels.jpg (a picture someone took of all the mitsy comp wheels) shows that 16g compressors are 6 double blades. only thing i can think of it that either it's some weird japanese blower that's a 16g with 12 blades, that it's a 16g that's somehow had a 14b compressor shoehorned into it or that it's been highflowed to a 17c which also has 13 blades or god knows what. anyone got a good idea of what i've got here? starts really whistling at about 12psi and makes a large amount of power that doesn't seem to trail off at all from 9psi stock to bled up to 15psi (most i've run until the cooler arrives).
me looks at AMR

upon further reading I learn that the 16G means that the blades are uneven, that G is a sign of varying length blades, where a B spec is equal length blades, and then there's C, whatever that is.
possibility i just thought of is that it might be a genuing 16G compressor housing used to highflow what would be a 14b turbo, is that how highflowing typically might work?. brain is hurting now.

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Gallo 24 all the way

na thats a 16g i have a 14b on my coffee table and the fins are flat compared to that lucky you...

You are correct the first time with your decription of a 16G wheel or any other compressor wheel with the G Suffix.
As you said it may well be a 17C

i wish alltime, it's not a 16G, as such (part number disagrees) G's have uneven blades, mine are all the same length... anyone 100% sure they know what it is or is it some mixture someone in japan has built?

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Gallo 24 all the way

the part no. for my tdo5h is 49178-01400 its got 12 finns but yours looks uneven compared to mine.?????????????????/

49178-01400 is a 14b, and the compressor looks the same as mine (the sizing i can't tell) but a 16G is obviously different, here, lookie. a 16 G looks way different, so i thought maybe it's a 17c, but how could you tell? the blades on a "C" turbo do look slightly steeper but can you tell just from that photo?

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Gallo 24 all the way

I'm told by sprinter on performance forums that it's a 14b with a 16G compressor cover, lookie there see, no gap between the blades and housing, and on mine there's a big gap, now, would it be possible to just unbolt the compressor cover, bolt a big/small 16G compressor onto the shaft and put if back togetcher or doesn't it work like that? Anddddd, in it's current guise, do you think 18psi will hurt it, I know a TC06 will blow 20 all day and they're about half the size, but what could the effect of the too-large compressor housing have?

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Gallo 24 all the way