rocker arm studs...

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novice
Posts: 187
Joined: Tue Feb 24, 2009 10:20 am

rocker arm studs...

Postby novice » Tue Feb 19, 2013 11:59 pm

when do you need to step up to 7/16 rocker studs over the 3/8? thx...novice
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Rumblerat
Posts: 125
Joined: Sun Feb 15, 2009 9:32 am
Location: North Side

Re: rocker arm studs...

Postby Rumblerat » Sat Feb 23, 2013 2:17 pm

Most flat tappet setups and hyd. roller that are run under 6500 rpm can use the good (ARP) 3/8" studs with no problems. Solid roller setups with 450lb and up open spring pressures or 6500+ rpm will have more safety margin with a 7/16" stud. I have run some milder solid roller setups with 3/8" and stud girdles and survived. Flex is what eventually breaks the stud, and the damage can range from replacing a stud and pushrod all the way up to destroying a camshaft, or a block, or a complete engine.
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novice
Posts: 187
Joined: Tue Feb 24, 2009 10:20 am

Re: rocker arm studs...

Postby novice » Sun Feb 24, 2013 8:32 pm

thanks for the help, rumble, I think I will move up to the 7/16 and count it as money well spent...novice

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