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Message: <blockquote data-quote="Paul" data-source="post: 828424" data-attributes="member: 9404">Oh, and just in case you're wondering what happens when you don't spend top dollar on valvetrain parts when trying to spin that RPM... here is Exhibit A:12:1 Compression Ratio Solid Roller 331 cubic inch road race engine. Solid roller camshaft, lifters, custom 3/8" pushrods, crappy rockers, and a set of insanely expensive valvesprings with almost 800 pounds "open" seat pressure.The pretty rocker looks a little deformed here:<img src="http://i1227.photobucket.com/albums/ee432/carpinteri/Mustang%20Stuff/RockerTogether.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />But wait! Something is amiss... :confused1:<img src="http://i1227.photobucket.com/albums/ee432/carpinteri/Mustang%20Stuff/RockerBrokeTop.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://i1227.photobucket.com/albums/ee432/carpinteri/Mustang%20Stuff/RockerBrokeSide.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Which caused the valve to drop into the engine at ~73-7400 rpms...<img src="http://i1227.photobucket.com/albums/ee432/carpinteri/Mustang%20Stuff/PistonTop.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://i1227.photobucket.com/albums/ee432/carpinteri/Mustang%20Stuff/PistonSide.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://i1227.photobucket.com/albums/ee432/carpinteri/Mustang%20Stuff/PistonLogo.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /><img src="http://i1227.photobucket.com/albums/ee432/carpinteri/Mustang%20Stuff/PistonBottom.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Which ended up doing so much damage that the race block had to be sleeved, the head welded and repaired, and all I got for it was this piston that looks like a chinaman laughing at my sorrow.<img src="http://i1227.photobucket.com/albums/ee432/carpinteri/Mustang%20Stuff/PistonTop2.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Pay now, or pay later.Paul.</blockquote>