Visit The Dirt Forum for More Information

Author Topic:   Poly Locks for Rocker Studs
Dirt Maniac

Total posts: 174
posted January 16, 2003 07:14 AM
A while back I had a problem with these poly locks which had a recession of about a 1/4 inch before the threads began. I mean that the poly lock nut adjusted the rocker but had less threads onto the stud than one would if it were fully threaded. The problem was that two studs (on different cylinders) snapped off right about where the threads end and the stud has a smooth portion above the hex head. They were no-name studs, true, but I blamed the fact that those poly locks covered less stud with threads and left more stud length for flexing and breakage. I put all new ARP studs and changed the poly locks to the fully threaded ones and have had no more problems.

Here's what I'm getting at; I ordered those umbrella style cool nuts from Speedway- the ones that help collect oil and drip it back onto the stamped steel rocker fulcrum ball. Well, guess what? They have the same extension of no threads like the ones I blamed for my earlier problems. I'm hesitant to run them, but if they had this inherant problem, why would they make and sell them? Can someone shed some light on this for me?

Dirt Forum Champ
Total posts: 620
posted January 16, 2003 07:38 AM
try using a longer s-crew in stud.

Dirt Freak

Total posts: 237
posted January 16, 2003 12:42 PM
Never used the cool nuts from Speedway, but personally, I'd stay away from them.

I had the exact same problem you had with a set of Pioneer (cheap) poly locks. Same recessed area at the bottom without threads. Broke a few studs with them too.

I've since switched over to a set of Lunati locks, and they're threaded all the way down. Cost was only about $5 more. Guess you get what you pay for sometimes...

I too have been bit by the no-name studs in the past. It's ARP or nothing from now on.

[This message has been edited by istock59 (edited January 16, 2003).]

Dirt Roller

Total posts: 22
posted January 17, 2003 12:35 AM
your right about you pay for what you get and i use the lunati's too along with a name brand stud girdle over the top to hold it all in up to 7500. Be sure to have extra tall valve covers to clear them and you will not break another ***** in or pinned stud

Dirt Maniac

Total posts: 115
posted January 19, 2003 02:15 PM
I highly reccomend swiching over to 7/16 studs. Iv you have to but studs and rockers anyway the cost difference is very small.

Back to the Archives