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Ls1 Engine Build Spirallocks

Ls1 Engine Build Spirallocks
LS1 Engine Build - My First Stroker
While stock GM pistons have their pins press-fit into the rods (thereby limiting how far the pin can travel out of the piston's pin bore), performance pistons use so-called "spirallocks" to hold the piston pin in place. This makes for a "full-floating" piston pin, which gives more bearing surface for the piston pin (in the rod and in the piston as opposed to just in the piston), reducing friction and thereby increasing component life. The spirallocks come as shown on the right, but must be stretched open like a slinky in order to get them ready for installation (left). View Related Article
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