Turbine housing 16cm2 (T4 twin entry). Compressor billet 60mm/86mm, 7+7 blades. Power range from 650 to 700 HP.
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Turbine housing 12cm2 (T3 twin entry) V-band 2.5". Oil cooled. Power range from 400 to 500 HP.
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There is a gap between the shaft and sleeve and a gap between the sleeve and housing. These two gaps combined allow the compressor wheel tip to move side to side in what may look like an alarming amount. This is normal. As long as the wheel is not touching the housing, you are fine. There should be no play axially (in and out) with the compressor wheel and shaft. You were doing some grinding or porting near the motor with the turbo removed. You blocked off the turbo oil drain pipe with a piece of tape. You forget to take the piece of tape and install the turbo. Start it up and instant James Bond smoke. The oil flow into the turbo has nowhere to go and gets pumped out the bearing seals. If your turbo does this, check the oil drain for blockage, remove it and start it up again. The turbo wil.
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Turbine housing 10cm2 (T3 twin entry) V-band 2.5". Oil cooled. Power range from 400 to 500 HP.
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