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#1
05-31-2020, 07:27 PM
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My theory is since the lifters do not compress at all and act like a solid lifter rather than a hydraulic lifter, mixed with some preload cause stresses high enough to break something. Both new sets I bought from 2017 would not compress at all until I disassembled one set after 100 miles of use, cleaned and reassembled them and then the plungers depressed like they should. The CC instructions supplied with the lifters specifically said to not immerse them in a solvent to clean. Think of adjusting a solid roller with some preload.
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1967 Firechicken, 499", Edl heads, 262/[email protected]" duration and 0.627"/0.643 lift SR cam, 3.90 gear, 28" tire, 3550#. [email protected] mph with a 1.45 60'. Still WAY under the rollbar rule. |
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#2
06-01-2020, 10:00 AM
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Quote:
I've read the supplied instructions with a few sets in recent years, and this NOT what I read. https://static.summitracing.com/glob...cca-850-16.pdf In the link above, the instructions state, "While cleaning, be careful to NOT blow out this grease for this is very vital to initial break-in. Also do NOT clean with aerosol cleaners! " I've talked with Comp reps about this. The point is to NOT use compressed air to "blow out" on the rollers. That can cause the roller and bearings to experience excessive speed under no load, which can damage the bearings. An aerosol could do the same thing. I soak them in solvent for at least a few hours. Remove them and let them dry for awhile, then soak them for at least a few more hours in a bucket of oil. I check the rollers coming out of the solvent, and again coming out of the oil, to make sure they are rolling smoothly.
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'73 T/A (sold). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 317rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'. '67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust |
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#3
06-01-2020, 10:12 AM
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Solid roller lifter Pre-Installation:
It is important for all new roller lifters to be washed thoroughly with mineral spirits or parts washing solvent to remove all assembly grease. After the lifters are cleaned, it is recommended to soak them in common engine oil to ensure bearing saturation. https://www.compcams.com/amfile/file...product/26850/ Hydraulic roller lifter Instructions: 1. Lifter Preparation: Remove your new COMP Cams® lifters from the packaging, and clean the lifters thoroughly in mineral spirits or an equivalent solvent. https://www.compcams.com/amfile/file...product/26536/ . .
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'70 TA / 505 cid / same engine but revised ( previous best 10.63 at 127.05 ) Old information here: http://www.hotrod.com/articles/0712p...tiac-trans-am/ Sponsor of the world's fastest Pontiac powered Ford Fairmont (engine) Best time 5.13 at 140 mph (1/8 mile) , true 10.5 tire, stock type suspension https://www.youtube.com/watch?v=qDoJnIP3HgE |
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