Roller Rocker Part Numbers
Thread Starter
Melting Slicks
Joined: Apr 2003
Posts: 2,150
Likes: 6
From: NS
Roller Rocker Part Numbers
So I'm looking for 7/16" studs, 1.6 full roller, self-aligning rockers. After browsing the cam makers' web pages I still don't have part numbers:
Comps Hi-Tech: 3/8" stud only
Comps Pro Mags: Self-aligning 3/8" stud only
Crane Gold Race: Self-aligning 3/8" stud only
Crower Stainless: No self-aligning?
GM LT4: 12557779
Am I missing something? If I want self-aligning and 7/16" studs my only choice is the GM rocker? Please help me find the correct part numbers.
Thanks
Comps Hi-Tech: 3/8" stud only
Comps Pro Mags: Self-aligning 3/8" stud only
Crane Gold Race: Self-aligning 3/8" stud only
Crower Stainless: No self-aligning?
GM LT4: 12557779
Am I missing something? If I want self-aligning and 7/16" studs my only choice is the GM rocker? Please help me find the correct part numbers.
Thanks
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
What year Vette????
My stock #113 heads had screw in studs with 7/16" bottoms and 3/8" tops. I installed CC ProMagnum 1.6:1 for 7/16" studs.
I thought CC recently added a self aligning ProMagnum for 7/16" studs???
Actually the price of going either way is about the same as self aligning RRs cost more than non self aligning, which offsets the extra h/w needed for the latter. And, if you are switching to 7/16" studs, it is
trivial to install hardened guide plates.
My stock #113 heads had screw in studs with 7/16" bottoms and 3/8" tops. I installed CC ProMagnum 1.6:1 for 7/16" studs.
I thought CC recently added a self aligning ProMagnum for 7/16" studs???
Actually the price of going either way is about the same as self aligning RRs cost more than non self aligning, which offsets the extra h/w needed for the latter. And, if you are switching to 7/16" studs, it is
trivial to install hardened guide plates.
Race Director
Joined: Sep 2000
Posts: 17,298
Likes: 33
From: The Top of Utah
Originally Posted by TheCorvetteKid
You may need to look under listings for big block Chevy rocker arms. I don't think that any small blocks came with that size rocker stud.
Good luck.
Good luck.
Originally Posted by 65Z01
My stock #113 heads had screw in studs with 7/16" bottoms and 3/8" tops. I installed CC ProMagnum 1.6:1 for 7/16" studs.
RACE ON!!!
Thread Starter
Melting Slicks
Joined: Apr 2003
Posts: 2,150
Likes: 6
From: NS
Originally Posted by STL94LT1
I don't think anyone makes a s/a rocker in a 7/16 stud size.
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Drifting
Joined: May 2002
Posts: 1,581
Likes: 2
From: The Motor City
I just did a search on Summit Racing's website, and all the 1.6 ratio, full-roller rocker arms for 7/16" studs that came up are not self-aligning.
I'm shocked that nobody makes a self-aligning 1.6 full-roller rocker arm for 7/16" studs!
You may have to go with the GM units on this one.
I'm shocked that nobody makes a self-aligning 1.6 full-roller rocker arm for 7/16" studs!
You may have to go with the GM units on this one.
Thread Starter
Melting Slicks
Joined: Apr 2003
Posts: 2,150
Likes: 6
From: NS
Originally Posted by TheCorvetteKid
I just did a search on Summit Racing's website, and all the 1.6 ratio, full-roller rocker arms for 7/16" studs that came up are not self-aligning.
I'm shocked that nobody makes a self-aligning 1.6 full-roller rocker arm for 7/16" studs!
You may have to go with the GM units on this one.
I'm shocked that nobody makes a self-aligning 1.6 full-roller rocker arm for 7/16" studs!
You may have to go with the GM units on this one.
Team Owner
Joined: Dec 2000
Posts: 90,675
Likes: 304
From: SE NY
Cruise-In II Veteran
I just checked the Comp Cams web site and indeed the ProMags do not come in self aligning for 7/16" studs.
The reason for going to 7/16" studs is to minimize stud deflection at high rpm, which would reduce valve lift.
Actually if you add up the cost of self aligning ProMags vs non self aligning plus guide plates & push rods I believe the cost is about the same.
The reason for going to 7/16" studs is to minimize stud deflection at high rpm, which would reduce valve lift.
Actually if you add up the cost of self aligning ProMags vs non self aligning plus guide plates & push rods I believe the cost is about the same.
Drifting
Joined: May 2002
Posts: 1,581
Likes: 2
From: The Motor City
Originally Posted by Atok
Maybe I'll just stick with the 3/8" studs and self-aligning to save cost, but will I over stress them with a 1.6:1 ratio?
Thread Starter
Melting Slicks
Joined: Apr 2003
Posts: 2,150
Likes: 6
From: NS
Originally Posted by TheCorvetteKid
No. In fact, I (literally) just finished replacing my stock stamped steel rockers with a set of self-aligning Comp Cams 1.6 Magnum Roller Rockers (p/n 1418-16). I'm still running the stock 3/8" studs, and I don't predict that they will prove to be a problem. The stock valve springs may prove to be an issue in the next few years, but the studs should be more than capable of handling these rockers.
Drifting
Joined: May 2002
Posts: 1,581
Likes: 2
From: The Motor City
Originally Posted by Atok
Did you notice any SOTP difference? Are the rollers quieter than the stock rockers?
I will definitely let you know if I 'feel' any difference, and if they are any quieter than stock.
Le Mans Master
Joined: Jul 1999
Posts: 8,683
Likes: 6
From: Phoenix AZ
If you want the GM LT4 self aligning 1.6 RR's I have a friend that has a couple very low mileage sets, with studs I believe. He's been wanting to get rid of them, I can ask him what he wants for a set. Let me know!
Thread Starter
Melting Slicks
Joined: Apr 2003
Posts: 2,150
Likes: 6
From: NS
Originally Posted by Zix
If you want the GM LT4 self aligning 1.6 RR's I have a friend that has a couple very low mileage sets, with studs I believe. He's been wanting to get rid of them, I can ask him what he wants for a set. Let me know!
Cruising
Joined: Jun 2005
Posts: 10
Likes: 0
From: Brewster NY
HAs anyone used the Proform aluminum rockers I see on Summit really cheap? Too good of a deal to be true?
http://store.summitracing.com/partde...=KeywordSearch
http://store.summitracing.com/partde...=KeywordSearch
