Rocker Arm Studs/Spring Loads
Thread Starter
Racer
Joined: Jul 2000
Posts: 289
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From: Norfolk, CT
Rocker Arm Studs/Spring Loads
What's a safe maximum valve spring load with the pressed-in rocker arm studs on the small blocks? Are threaded, straight-shank studs (without hex wrench face) available which allows one to just tap the hole in the head casting without having to machine down the posts on the casting? Your experience and opinions are appreciated.
Le Mans Master
Joined: Mar 1999
Posts: 6,744
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From: delmont pa
Cruise-In I Veteran
Cruise-In II Veteran
Re: Rocker Arm Studs/Spring Loads ('69CoupeDude)
yes there are studs without the hex that are from "pioneer" and most autoparts can get them. you need a tap with a .375 pilot ground on the end so you get the tap started straight unless you do it in a milling machine. i have used up to 100# on the seat with pressed in studs
Thread Starter
Racer
Joined: Jul 2000
Posts: 289
Likes: 0
From: Norfolk, CT
Re: Rocker Arm Studs/Spring Loads (clem zahrobsky)
Thanks for the reply, Clem. What's your (max) spring load over the nose? Also, do they use pressed-in studs on the Vortec heads. It looks like that on the pictures I've seen.
Race Director
Joined: Mar 2001
Posts: 11,322
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From: Living in the Hartland
Re: Rocker Arm Studs/Spring Loads ('69CoupeDude)
There are some companies that sell the Vortec heads with upgraded springs, try google searching on them and there should be some spring specs. Vortec heads flow well to about .500 lift so choose a cam with lift less than .500 then that should give you your spring load requirement.
