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LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Comp Cam Magnum 1.6's

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Old 11-18-2008, 04:53 PM
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Comp Cam Magnum 1.6's
i was wondering if CC Magnum 1.6 rr's will be alright to use for my 355 i am building.will be run with stock bottom end and le2 top end. if not, what is ok to use
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Old 11-18-2008, 05:46 PM
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why wouldnt they be okay to use? I have a set on my car with no problems.
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Old 11-18-2008, 06:31 PM
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I'm running them as well. They work great. You will need to clearance the valve covers, and they will sound like a sewing machine.
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Old 11-18-2008, 07:11 PM
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Clearance with power tools...
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Old 11-18-2008, 07:42 PM
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Keep in mind, if im not mistaken (which I might be) but comp magnums and pro magnums are not the same.
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Old 11-18-2008, 08:15 PM
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Originally Posted by bombebomb
Keep in mind, if im not mistaken (which I might be) but comp magnums and pro magnums are not the same.
You're not mistaken;
Magnum Roller Rockers
Pro Magnum Roller Rockers
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Old 11-19-2008, 07:52 PM
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thanks guys, also what is the diff. between Self- Aligning and NSA?
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Old 11-19-2008, 11:22 PM
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I run comp magnum SA rockers on my cc503 cam
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Old 11-20-2008, 01:08 AM
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Originally Posted by 1993Fast_Z
thanks guys, also what is the diff. between Self- Aligning and NSA?
NSA's require guideplates and hardened pushrods. Self-Aligning don't, but I think you have to make sure that the tip of the rocker does not interfere with the valve spring retainer. SA's work to keep the rocker aligned on the valve by having "guides" built into the tip of the rocker. This is where you have to have clearance of the retainer.

I went with NSA 1.6 Pro Mags on my build. They make more noise than I thought they would, but it's normal for them.
Last edited by ACE1252; 11-20-2008 at 01:15 AM.
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Old 11-20-2008, 06:47 AM
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If you want real benefits from changing rockers, get full roller rockers like the Pro Magnums. Magnums are roller tipped only and not near the value the Pro Mags are, IMHO.
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Old 11-20-2008, 11:13 AM
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well which are better/safer? SA or NSA?
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Old 11-20-2008, 01:59 PM
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Originally Posted by 1993Fast_Z
well which are better/safer? SA or NSA?
I personally think for high RPM use that NSA is better(that's why I went NSA). However, Chevy saw fit to use SA on the LT4....and it can spin to 6500.
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Old 11-20-2008, 03:46 PM
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Originally Posted by 1993Fast_Z
well which are better/safer? SA or NSA?
NSAs are fine for anything, but are the better choice for high RPM use.
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Old 11-20-2008, 05:57 PM
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so if i am not going higher than 6500, i can get SA's? i just dont want to jump a rocker or damage this engine, because it took me a long time to get the money for this engine...
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Old 11-20-2008, 06:48 PM
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Originally Posted by 1993Fast_Z
so if i am not going higher than 6500, i can get SA's? i just dont want to jump a rocker or damage this engine, because it took me a long time to get the money for this engine...
If you don't want that to happen, get NSA rockers. Guideplates are cheap, and you should upgrade to hardened pushrods anyway.
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