Max RPM for stock replacement lifters?
09-21-2009, 01:01 AM
#3
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whether they are or are not i have not had a lifter failure from spinning to 6600RPM on my 130k mile stock bottom end or with my 3k mile stock bottom end. if your oil pressure is good then i think the only thing you stand to loose is a rod or a spring failure. FYI the 130k mile motor used NON hardened pushrods with the factory self aligning rockers which was stupid and the 3k mile motor has hardened pushrods, dart valve springs with dampener, NSA roller rockers and guide plates.
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09-21-2009, 03:13 PM
#8
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Yes, I understand that LS7s would have been a good choice.
The situation being that these were installed 3 years / 10K miles ago with a much milder cam.
The new cam will want to see more RPM and I see no reason to replace the lifters,
(they're in great shape) unless they can't handle the job.
The situation being that these were installed 3 years / 10K miles ago with a much milder cam.
The new cam will want to see more RPM and I see no reason to replace the lifters,
(they're in great shape) unless they can't handle the job.
09-22-2009, 11:52 AM
#11
I think they can take it, I'd worry about valve float at that rpm and snapping one. I think you'd bend a pushrod before you collapse a lifter. However, if you're worried about it, go for the LS7s.
09-22-2009, 04:55 PM
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Had I know that LS7s fit when I built the motor, I probably would have put them in.
At the time, people were still arguing over the issue.
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