383 Chevy Small Block LS1 Engine Build - LS Resurrection
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We've talked about the inherent valvetrain stiffness of the Gen X design. We decided to up the ante by installing a Yella Terra shaft-mount roller rocker arm setup. AFR's Mamo, who clued us in on this deal, has seen power increases of as much as 5 rwhp due to reduced friction and less flexing of the rocker body, which equals improved action at the valve for more airflow. More importantly, he says, these rockers "have a much smaller wipe pattern on the tips of the valves and offer better valvetrain geometry. This reduces sideloading of the valve stem and reduces valve guide wear considerably. With beefy springs and aftermarket cams approaching or exceeding 0.600 lift, the stock rocker arms can ruin a set of bronze guides in less than 20,000 miles." View Related Article
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