CRG Discussion Forum
Camaro Research Group Discussion => Originality => Topic started by: opelitis1 on April 30, 2008, 05:28:11 PM
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Small block rocker arms with the "O" on them... I have heard that these are better than the more common "V" type... Why??? I have maybe 15 of these O arms and cannot see any difference..
Maybe it is my vision, eh??? Ted
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The slot in an O arm is supposed to be longer for the high lift cams.
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I believe the "o" stamped rockers are a long slot rocker for higher performance engines. The newer rockers are also long slot as GM probably wanted to standardize a p/n. As opposed to the older low performance rocker arm which wasn't a long slot. Higher lift camshafts required a long slot rocker.
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How old are these "O" Rocker arms and were they in fact specific to a certain engine or car model??? I've had them for 10 years and the person I bought them from must've had them for maybe another 10 years B 4 me.... In the olden golden days, what did we in fact consider a "high lift" cam???? Anything over .450 and were they used in "solid lifter" cams only???
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The "o" rockers are also heat-treated differently for durability; the lash clearance on solid-lifter engines is much harder on the rockers than the constant zero-clearance of hydraulic lifters.
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Good info Mr JohnZ... Had these for sooo many years and basically never knew what I had or why and what they were used on.... Merci!!! Ted