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Will my lifters survive this cam?

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Old Mar 1, 2006 | 03:14 AM
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Default Will my lifters survive this cam?

I am going to a larger cam for my 408 and I am wondering if my lifters (comp 850s) will make it, or just assplode....

Cam is a comp 247/252 .647/.644 113+0
Springs are PRC .650 duals

I've been running a Trex for a few thousands miles without problems.

I really don't want to change lifters to morel$ if I don't have to.
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Old Mar 1, 2006 | 03:15 AM
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Originally Posted by mr2guru
I am going to a larger cam for my 408 and I am wondering if my lifters (comp 850s) will make it, or just assplode....

Cam is a comp 247/252 .647/.644 113+0
Springs are PRC .650 duals

I've been running a Trex for a few thousands miles without problems.

I really don't want to change lifters to morel$ if I don't have to.
You'll be absolutely fine....
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Old Mar 1, 2006 | 07:18 PM
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Originally Posted by cantdrv65
You'll be absolutely fine....
Good to hear.
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Old Mar 1, 2006 | 07:59 PM
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nope, get Comp Rs!
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Old Mar 1, 2006 | 09:04 PM
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That big of cam willl be hard on all of your valvetrain. Better to replace them while you have it apart.
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Old Mar 1, 2006 | 09:35 PM
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I agree.... unless you've got one badass oil pump then i'd get some new lifters... morel's or comp-r's
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Old Mar 1, 2006 | 10:15 PM
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Originally Posted by eamador11
nope, get Comp Rs!
I would never run comp-Rs....

The only lifters I've ever seen fail for defects were comp-r's....

If I HAVE to change lifters to run this cam I won't run it. I'll just spray a little more.... I see no point in dropping another $500 on lifters $400 on a cam to gain 25-30whp....
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Old Mar 1, 2006 | 10:36 PM
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It's going to depend more on the spring pressure and the kind of camshaft lobe you're running. I would run those springs or those lifters with that cam but that's just me.
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Old Mar 2, 2006 | 06:14 PM
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Personally Ive NEVER had a problem with a stock lifter.....I wouldn't change em. If you have ENOUGH spring for the cam and the PRCs or Patriot Golds are enough you wont have any problems. I recently bent 10 valves at 6000+ rpm when my stock timing chain let loose....with comp hardened pushrods. The stock lifters with 47,000 miles still look like new and they went back in with the new heads. Those same lifter have around 20,000 miles on em with a comp XER lobe and ISKY springs.
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Old Mar 2, 2006 | 10:35 PM
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Originally Posted by mr2guru
I would never run comp-Rs....

The only lifters I've ever seen fail for defects were comp-r's....

If I HAVE to change lifters to run this cam I won't run it. I'll just spray a little more.... I see no point in dropping another $500 on lifters $400 on a cam to gain 25-30whp....
Defects? never heard of that. but I do know alot of folk dont know what the heck their doing when installing comp-r so they fail.
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Old Mar 2, 2006 | 11:46 PM
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Originally Posted by eamador11
Defects? never heard of that. but I do know alot of folk dont know what the heck their doing when installing comp-r so they fail.
Yeah, I've seen more than a few instances of the roller coming apart....
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