Tune and Test Pontiac Firebird LS1 Build - LS1 Power Plan - Pontiac Tech
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Since the Comp Cam exceeded the factory LS1's spring rating of 0.525-inch lift, a complete Comp dual valvespring kit (PN 26921-kit, retail $670.56) was sourced to ensure that the valvetrain was up to the task. The springs support up to 0.650 valve lift and fit without the need to machine the spring seats. Included in the kit are springs, valve seals, titanium retainers, and spring seats. Rounding out the package is a set of Comp Cams Hi-Tech 5/16-inch one-piece pushrods (PN 7955-16, retail $146.34) that are produced from seamless 4130 chromoly with thick 0.080 walls and won't exhibit pushrod flex or be as prone to bending as the factory parts. View Related Article
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