Bought a set of Wiseco piston 86.5 for my rb25det engine block currently in the machine shop they set to .0025 ptw clearance what wiseco suggest seems to tight to me it will be engine will be running 650bhp 1.6bar to 1.8bar ring gap .0017 top ring .0018 second ring I was thinking of .0035 ptw not to sure on ring gap any advice what is everybody running
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