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Old 08-17-2008, 08:03 PM
GMR GMR is offline
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comp magnum roller tip rockers

I've been reading elsewhere that Comp Cams magnum roller tip rockers are somewhat noisy. Anyone have any experience with this? I'm thinking about them for a mild sbc 350 build.

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Old 08-17-2008, 08:38 PM
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Same rockers I use on my 4.3 chevy V6, I can`t tell any difference.
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Old 08-18-2008, 05:07 AM
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I was considering roller-tip rockers myself (to replace stock stamped steel), but read numerous comments from people that roller-tips aren't worth having. Apparently, most of the friction-reduction in a roller rocker comes from the fulcrum point and not the roller tip. I've since purchased a set of alloy Scorpion full rollers.
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Old 08-18-2008, 12:32 PM
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I run them with a Lunati solid roller and Iskenderian Red Zone lifters and don't notice anything extremely out of line, but then my motor makes noise anyway.
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Old 08-18-2008, 04:55 PM
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I run Magnum roller rockers on my Cobra's 289 HiPo, fitted with a flat tappet Comp Cams 268H. If it is any noisier, I certainly can't tell - but that may not be saying much, it ain't the quietest of cars...
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Old 08-18-2008, 05:10 PM
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Quote:
Originally Posted by v8hed
I was considering roller-tip rockers myself (to replace stock stamped steel), but read numerous comments from people that roller-tips aren't worth having. Apparently, most of the friction-reduction in a roller rocker comes from the fulcrum point and not the roller tip. I've since purchased a set of alloy Scorpion full rollers.
I remember reading an article authored by Racer Brown that said the rockers are made with a specified radius and that they roll on the valve stem tip. He said that with properly engineered valvetrain geometry, you should be able to insert a tissue paper between the rocker and the valve tip, roll it through a cycle and not tear the tissue paper. This would tell me that as you said, the roller on the rocker tip is just so much snake oil and the real advantage would be in the roller trunnion.
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Old 08-18-2008, 06:36 PM
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rockers

Noisy is subjective. Some guys have ears that can hear different sounds then other guys do. Every engine that i have built with a roller tip rocker is a tad bit noiser then with out. I can hear it..

The deal with the roller tip rockers has more to do with them being closer to the correct ratio then a factory style rocker. If you check valve lift out at the retainer with a stock rocker and then a quality roller tip rocker you will soon see why guys use them. Actual hp from using them can be some what of a crap shoot to proove. But i personally like a engine where all cylinders work the same. It just makes sense to me.

Keith
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Old 08-18-2008, 09:15 PM
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"The deal with the roller tip rockers has more to do with them being closer to the correct ratio then a factory style rocker."

Thanks Keith, sounds right to me.
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Old 08-19-2008, 02:21 AM
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If your budget permits I would recommend you go with a full roller design rocker arm. I think you would be much happier if you do.
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Old 08-19-2008, 07:42 AM
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thanks everyone for the replies, appreciate it
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