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gt350hr · 01-02-2013, 11:22 PM

Rod,
I assume you're going to use the original tru arc locks. On those the min would be .010 and max .030. Any tighter would try and push the locks out during piston /pin flex and looser than .030 could hammer the locks hard enough to break the eyelets off. Spiro locks are a bit more forgiving and you could reduce the above numbers by .005. The "normal" groove is cut for a hard to find (now) .052 wide lock (common now is .042). Good luck. It "may" be easier to get the grooves widened for double .042 sipro or tru arc locks. Rebco Machine in Wichita Ks can do the mod for you.
Randy

01-02-2013, 11:22 PM	#4
gt350hr Junior Member Join Date: Jul 2012 Location: California Posts: 5 Likes: 0 Liked 0 Times in 0 Posts	Re: piston pin end play? Rod, I assume you're going to use the original tru arc locks. On those the min would be .010 and max .030. Any tighter would try and push the locks out during piston /pin flex and looser than .030 could hammer the locks hard enough to break the eyelets off. Spiro locks are a bit more forgiving and you could reduce the above numbers by .005. The "normal" groove is cut for a hard to find (now) .052 wide lock (common now is .042). Good luck. It "may" be easier to get the grooves widened for double .042 sipro or tru arc locks. Rebco Machine in Wichita Ks can do the mod for you. Randy