Related Photo Galleries
16a.Our Thumper camshaft specs out as follows: Gross valve lift for both intake and exhaust lobes is 0.554 inch. Duration at 0.050 inch is 219 degrees on the intake side and 233 on the exhaust side, and the lobe separation is ground at 109 degrees. Once the cam was slid in place, the retainer and timing gear were reinstalled. The retainer bolts were torqued to 17.7 lb-ft and the timing chain bolts torqued to 25.8 lb-ft.