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I have recently purchased a S13 Silvia (SR20DET), and I have been trying to piece together the turbo configuration, and wondering if there is anyone with a similar set up? I am interested in getting a better understanding first hand as I am not that clued onto turbo set-ups. I know what all the individual pieces are: The exhaust housing has Garrett cast into it, and the CHRA has Garrett on the name plate. I have not seen Garrett on the intake housing. CHRA - 700177-0010 MODEL - GT3076R TURBINE SIDE SIZE = 56.5 mm OUTLET = 52.0 mm TRIM = 84 COMPRESSOR SIDE SIZE = 76.2 mm INLET = 53.1 mm TRIM = 48 I have not seen the exhaust side turbine, however the intake side has seven blades, so I am assuming the exhaust has 14? This is what research is telling me anyway. Intake housing Have not been able to find a part number on the housing, however the A/R is 0.70. Exhaust housing - 449010-1 From researching it seems that this housing is internally gated, with a A/R 0.64. The turbo on my car is internally gated, however, I have not seen the A/R. The turbo has been low mounted and there is very little clearance between the intake housing and the engine mount. I am taking it to be tuned next week as my first dyno run indicated it was running a little lean, as well as the AFR fluctuating right through the rev range. It also struggles to maintain a constant idle. A bit more insight into my set-up before I take it to the tuner would be appreciated. Thanks