Rocker arms for 408 build
IMHO: The rev limiter won't have any impact on stud breakage. The flexing force studs will be essentially the same each cycle at all RPM's and that will fatigue a weak stud regardless. Individual stud weakness is your issue.
FWIW Just a word of caution when mulling over all of this: You can't equate stud strength and durability with that of the stock Magnum pedestal setup. The way to forces work is different in regards to the strain within the parts, and the pedestal setup is superior for strength and fatigue issues. No wonder the stock Magnum rockers are what tend to break in that setup.
I appreciate your input. So you're saying the pedestal adds strength over studs and polylocks. Makes sense.
I suspect a 5/16 bolt through a pedestal never breaks, and has less flex thana 5/16 stud.
I'm considering keeping the pedestal setup. Are you suggesting that may be stronger than studs and rollers?
Maybe this is why the girdles make sense with studs.
Have you heard of Magnum rockers breaking? I only know of pushrod wearthrough. For that reason I may use the thicker stamped version.
It's very easy to advocate for upgraded valvetrain and I see the benefits.
I think its also easy to get into overkill, and even create setup hassle.
Everything I'm seeing suggests there is a threshold where the upgrade makes sense.
Lift over .525.
High spring load (over 350? not sure.)
High revs, especially continuous.
Desire/need for small horsepower gains.
Feel free to critique or add to the list.
