| You said yours are similar to the Disco potatos. In the naming convention, the first 2 numbers are the turbine type, and the second 2 numbers are the compressor type. Therefore, the 2530's have a GT25 turbine, with a GT30 compressor. The Disco potato's have a GT28 turbine, with a GT30 compressor, so that would make them 2830's. If yours are GT28R turbos, I guess that would make them the equivalent of a GT2828 (or just plain GT28) instead of GT2830's like the disco potatos. Now a quick rundown for reference: Turbo name........Turbine side/Compressor side T25.............................T25/T25 T28.............................T25/T3 T3................................T3/T3 GT2530......................GT25/GT30 GT2540......................GT25/GT40 Sport 700/GT28RS,2830..GT28/GT30 GT2835......................GT28/GT35 GT3037......................GT30/GT37 GT30R........................GT30/GT30 ??GT28R.....................GT28/GT28 ? The last one I'm not sure about. I don't know why nobody makes a "GT2528", it seems like it would fit right in the mix. Maybe the Sport 530's are those or similar?
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