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Old 01-27-2016 | 11:10 PM
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Originally Posted by Griff
Interesting. It looks more like a VERY close copy than an actual upgrade. Can't be much of a change since no ECU change is needed.
specs almost the same as 525efi cam.looks like i won,t need to find a used 525 cam for a build i am working on.
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Old 01-27-2016 | 11:18 PM
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^^^ You should use a 651 cam Mike , there`s 2 for sale not too far away, probably withing reach
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Old 01-28-2016 | 06:54 AM
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the 651 is to much cam for this build.
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Old 01-28-2016 | 08:05 AM
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I believe the 525efi cam , even though on a 114lsa, has more overlap than a HP500 cam. I dont have the info with me on that. But Im pretty sure it does.
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Old 01-28-2016 | 08:21 AM
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Originally Posted by Mr Maine
Mild, I looked at those. I wonder if they are the 8620 steel?
I would be willing to bet its a 5150 cam core.
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Old 01-28-2016 | 09:06 AM
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Originally Posted by Black Baja
I would be willing to bet its a 5150 cam core.
We pulled a comp roller out of a friends 454 recently 226/234 duration at around .600 lift and there was signs of spalling on some of the lobes. Although the cam worked well, he is considering going to a crane 731.
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Old 01-28-2016 | 09:21 AM
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Originally Posted by Mr Maine
We pulled a comp roller out of a friends 454 recently 226/234 duration at around .600 lift and there was signs of spalling on some of the lobes. Although the cam worked well, he is considering going to a crane 731.
I'd be willing to bet it was a 5150 core. Comp isn't really know for using the best materials available. The Crane Cams are the real deal.
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Old 01-28-2016 | 09:21 AM
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I believe a good core material is one thing, but a good core material that has been ground past its hardness treatment, can be an issue. Kind of like crankshafts.

Something basic like a HP500 cam, 525efi cam, shouldnt need stupid spring pressures to keep the valvetrain stable. The crane stuff has very gentle lobes.
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Old 01-28-2016 | 09:23 AM
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Originally Posted by Black Baja
I'd be willing to bet it was a 5150 core. Comp isn't really know for using the best materials available. The Crane Cams are the real deal.
I dont know about that 525 cam, but yea, and thats the reason alot of comps basic hydraulic roller cams are quite a bit less money, like in the 300 dollar range. You arent gonna get a 8620 or 9310 cam for 300 dollars.
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Old 01-28-2016 | 09:59 AM
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Originally Posted by MILD THUNDER
I dont know about that 525 cam, but yea, and thats the reason alot of comps basic hydraulic roller cams are quite a bit less money, like in the 300 dollar range. You arent gonna get a 8620 or 9310 cam for 300 dollars.
I personally would spend the couple extra bucks on a billet cam regardless of how radical the lobes are.
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