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02-08-2025, 08:07 AM
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#11 |
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All stock and staying that way
  
Join Date: Jul 2003
Location: Elkland, PA
Posts: 2,501
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Re: Comp Cams
Three things to keep in mind in today's world-
1. Do not use any recently produced flat tappet cams. The main issues are the metallurgy and the machining of the lifters, not the lack of zinc in the oil. Run NOS parts or roller cams. 2. Comp cams are mediocre at best. I would be looking at other manufacturers. Older stock is better regardless. 3. While the lack of zinc can cause issues, it isn't the only thing contributing to these issues. Still run a high quality oil with zinc in these older engines
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1970 K/5 Blazer CST 4WD, TOTM winner December 2024! Medium Bronze poly, 93k ACT. miles, 350, 4 speed, rear positraction, 16.5" x 8.25" HD Kelsey Hayes wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Frame off restored 1970 K20, To be a clone of my Grandfather's K20, Dark Blue poly, 350, 4 speed, 16.5" X 8.25" Kelsey Hayes wheel option, tilt, tach, vacuum, AM radio. Latest project truck 1972 Cheyenne Super 20 2WD, Dark Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor...  2017 Sierra 1500 SLT 4WD, Black, 51k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 71k miles, 3.6, 8L45, 3.23 LS, 18" wheels |
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