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0605phr 08 Spirolocs Z

If you have ever fought to install Spirolocs, here is the no-hassle installation technique. On this piston note that to accommodate the increase stroke and a longer rod, the pin bore invades the oil ring groove. A steel support rail ring is used to bridge the pin bore/ring groove gap so the oil ring can function as normal.
Bottom-End Basics -- Technical Article -- Popular Hot Rodding

If you have ever fought to install Spirolocs, here is the no-hassle installation technique. On this piston note that to accommodate the increase stroke and a longer rod, the pin bore invades the oil ring groove. A steel support rail ring is used to bridge the pin bore/ring groove gap so the oil ring can function as normal.  View Related Article

 

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