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Showing results for tags 'stock r33 gtr turbos'.
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Hey guys, I have a pair of stock rebuilt R33 GTR turbos with steel wheels (I'm planning on going to a single turbo precision 6266 setup next year; so no twin upgrade recommendations); I'm curious about the internal wastegate spring pressure on stock turbos? I am planning on running about 1.4-1.5bar on these rebuilt turbos until I get all of my single turbo bits and wondering if i'd need to size up the springs? Would I also need to drill out the oil supply a bit? Has anyone done this before and have any recommendations? I heard the springs max out at about 15psi; just wanted some clarification on how to proceed before I put the turbos back into the car for the summer. Thanks guys!