Steel versus aluminum rocker arms...Pros and cons?
#1
Steel versus aluminum rocker arms...Pros and cons?
I picked up a set of new Crane golds, but it seems like I've been stumbling across some bad news on not just the Cranes, but aluminum-bodied rockers altogether.
Do aluminum rockers deflect more than steel rockers? What is the BIG difference that would make someone pick a steel rocker over an aluminum?
Need a little help...if the majority says to use a steel rocker, then I need to send the Crane Golds back. Thanks in advance.
~Joe
Do aluminum rockers deflect more than steel rockers? What is the BIG difference that would make someone pick a steel rocker over an aluminum?
Need a little help...if the majority says to use a steel rocker, then I need to send the Crane Golds back. Thanks in advance.
~Joe
#3
I read about that too. It has to do with how the metal reacts to force. The steel stays rigid all the way to a certain point, then it starts to bend. The aluminum starts bending at a much lower level. So the aluminum is always flexing to a small extent, whereas the steel stays rigid.
I don't think the deflection would have anything to do with lift #s or valve float, etc, just the reliability of the rocker. The only pro to aluminum would have to be the lighter weight I would think.
Unless someone can say something else good about the aluminum rockers over steel I would always choose Comp's pro mags...
I don't think the deflection would have anything to do with lift #s or valve float, etc, just the reliability of the rocker. The only pro to aluminum would have to be the lighter weight I would think.
Unless someone can say something else good about the aluminum rockers over steel I would always choose Comp's pro mags...
#4
I guess the pros of Aluminum is that they are lighter... but the Steel pro-mags are lighter over the nose and stronger... I myself went with the pro-mags because they are rebuildable and warrantied forever if the bodies break.
#5
I like aluminum for a hydraulic cam. With the relatively light springs used with a hydraulic cam, they are plenty stong enough. Longevity with these springs should be fine too. GM used them on the LT4, right? For a solid lifter cam and race level spring pressure I would go with a steel rocker though.
Rich Krause
Rich Krause
#8
I'll be using one of the larger (236/242) XE grinds from Comp. Should I send the Crane Golds back and pick up the Pro Magnums, or will I be ok with them? I won't put many miles on the car once it is done, and will probably be a weekend/strip car.
Any more thoughts? Thanks.
Any more thoughts? Thanks.
#10
Originally posted by RamAir95TA
I'll be using one of the larger (236/242) XE grinds from Comp. Should I send the Crane Golds back and pick up the Pro Magnums, or will I be ok with them? I won't put many miles on the car once it is done, and will probably be a weekend/strip car.
Any more thoughts? Thanks.
I'll be using one of the larger (236/242) XE grinds from Comp. Should I send the Crane Golds back and pick up the Pro Magnums, or will I be ok with them? I won't put many miles on the car once it is done, and will probably be a weekend/strip car.
Any more thoughts? Thanks.
Rich
#11
Originally posted by Spinner
Steel wont wear like aluminum (stress cycles) and eventually break.
Steel wont wear like aluminum (stress cycles) and eventually break.
If you're talking about stamped steel rockers, then you're absolutely right about them breaking.
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