dzrick Posted April 10, 2009 Author Posted April 10, 2009 What are the specs on it? This hydraulic roller tappet is used on the 350 ZZ3 & ZZ4 engines. The duration at lash point in degrees (intake/exhaust) is 275/280 Duration at .050" tappet lift (intake/exhaust) is 208/221 Maximum lift with 1.5:1 rocker ratio (intake/exhaust) is 474/501. Valve lash is zero/zero and lobe centerline is 112 degrees.
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