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Discussion Starter #1 (Edited)
I was using the Straub method to determine my pushrod length and I have @ .350" of thread engagement on a 7/16" stud . Is that going to be sufficient for a mild hydraulic roller? Valve springs have 375#'s of open pressure.
 

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^^^^ X2
 

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Discussion Starter #5
I would love look for some longer studs. Do you run a girdle
No, not running a stud girdle currently. I talked to a machinist buddy and he gave me the formula to calculate it and I need almost double the thread engagement that I have. 7/16" is .4375 x 1.5 = .656" to be optimum for strength.
 

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I would find another buddy...
When a nut is used with a bolt, the nut thickness [ & therefore thread engagement ] is NOT double the thickness of the thread. But the nut holds just fine with that amount of thread engagement....& is designed that way.

Use Loctite as I said in post #2 & you will be fine. Your open spring pressure is not that high.
 

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I'm a little late, but anyway.

If you have clearance between the rocker and stud base, put a hardened ARP head washer under the stud. Not perfect but definitely better than what you have.
 
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