Roller Rockers
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Junior Member
Joined: Aug 2004
Posts: 15
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Car: 1991 Z-28 Camaro
Engine: 305 Tuned Port Injection
Transmission: 700r4
Roller Rockers
What are the major differences between aluminum and magnum rockers? I'm not planning on trying to hit over 5,000 rpms so do I really need the magnums or can I get away with useing aluminum roller rockers?
TGO Supporter
Joined: Jul 2003
Posts: 4,803
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From: Grand Rapids, MI
Car: Z28
Engine: Sb2.2 406
Transmission: Jerico 4 speed
Axle/Gears: Ford 9" 3.60
The matter is not how high you rev the engine. It's a matter of fatigue resistance. Aluminum has nowhere near the fatigue resistnance strength that Comp Magnum rocker arms do, which are 8620 chromo steel.
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