witch roller rockers?
Burning Brakes
Joined: Dec 2006
Posts: 936
Likes: 2
From: Tyrone PA
Self aligning narrow body roller rockers, preferably full roller not just roller tip, and for a performance upgrade go to 1.6 rockers. I bought mine from Summit Racing, they were the best deal. Don't forget to remove the drip tabs from the top of the valve covers inside. You can grind them off or just snap them off with vice grips. Some say to change springs and valve seals when going to 1.6 rockers, but I didn't and I didn't have a problem with my stock ones.
Burning Brakes
Joined: Dec 2006
Posts: 936
Likes: 2
From: Tyrone PA
Yes, 3/8" stud. If you don't get narrow body they won't work with centerbolt valve covers. And you need self aligning for your year vette. 1.6 rockers will give you a 10-15hp increase, and full roller rockers will give your engine less friction and a little lower oil temp. Summit sells nice blue anodized ones, they are pretty. It's sad to have to cover them up with valve covers!! 
Thread Starter
Burning Brakes
Joined: Aug 2007
Posts: 917
Likes: 2
From: Charlotte NC
Yes, 3/8" stud. If you don't get narrow body they won't work with centerbolt valve covers. And you need self aligning for your year vette. 1.6 rockers will give you a 10-15hp increase, and full roller rockers will give your engine less friction and a little lower oil temp. Summit sells nice blue anodized ones, they are pretty. It's sad to have to cover them up with valve covers!!
Burning Brakes
Joined: Aug 2000
Posts: 1,146
Likes: 2
From: Albuquerque NM
I used the CA-1318-16 COMP Cams Pro Magnum Roller Rocker Arms without clearance issues (except drip tabs). These are steel and run very well.
Though I made the mistake of keeping the 3/8 stud vice changing them out for the 7/16 version. If you thinking about stepping up in power later via better cylinder heads, the 7/16 will help to keep everything aligned.
For the record converted a head (fastburn) removing the guide plates and required ARP longer studs. The heads were raised port. The guide plates are not necessary for self aligning rockers...even the one used just for assembly as the L98 heads
One thing is common though is the need for a 0.100" longer push rod. Hyd lifters forgive up to 0.050ish of improper length, but the 0.100" will help get in the ball park. Read up on how to properly check contact pattern with the valve tip.
Though I made the mistake of keeping the 3/8 stud vice changing them out for the 7/16 version. If you thinking about stepping up in power later via better cylinder heads, the 7/16 will help to keep everything aligned.
For the record converted a head (fastburn) removing the guide plates and required ARP longer studs. The heads were raised port. The guide plates are not necessary for self aligning rockers...even the one used just for assembly as the L98 heads
One thing is common though is the need for a 0.100" longer push rod. Hyd lifters forgive up to 0.050ish of improper length, but the 0.100" will help get in the ball park. Read up on how to properly check contact pattern with the valve tip.
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Safety Car
Joined: Aug 2004
Posts: 4,908
Likes: 735
From: Southwest Kansas
2022 Corvette of the Year Finalist -- Unmodified
2021 C6 of the Year Winner - Unmodified
I found a set of Crane Gold 1.6 RR, narrow body, self aligning for my LT1. I did change out the valve springs and seals while I was at it.
Instructor
Joined: Nov 2007
Posts: 101
Likes: 0
From: Eureka California
I'm planning on using the GM Performance Parts roller rockers with the GMPP studs unless anyone knows about rebuilding factory LT4 rocker arms. The roller bearings are rough and would need to be replaced. Also one managed to jump off the valve tip and needs to be totally replaced as the body of the rocker arm is damaged.
Race Director
Joined: Jan 2002
Posts: 12,264
Likes: 88
From: O'Fallon Missouri
I would check valvetrain geometry before buying longer pushrods. Most will need a shorter pushrod with increased lift.
Racer
Joined: Apr 2006
Posts: 405
Likes: 1
From: Twinsburg OH
I'm planning on using the GM Performance Parts roller rockers with the GMPP studs unless anyone knows about rebuilding factory LT4 rocker arms. The roller bearings are rough and would need to be replaced. Also one managed to jump off the valve tip and needs to be totally replaced as the body of the rocker arm is damaged.
I also went with the GMPP 1.6 rockers. Seemed like the best balance of cost performance and reliability. I was going to go with the proform "blue anadized ones" but read a lot of bad things about them like the bearings coming apart.
Le Mans Master
Joined: Jun 2006
Posts: 5,642
Likes: 5
From: One day you're a Comet...the next day you're dust... Arkansas
Le Mans Master
Joined: Apr 2000
Posts: 5,589
Likes: 0
From: DrunkDefender
CI 1-2-3-4-5-6-7-8 Veteran
CI-IV AutoX Champ
CI-IV Burnout Champ
St. Jude Donor '07-'10
I'm planning on using the GM Performance Parts roller rockers with the GMPP studs unless anyone knows about rebuilding factory LT4 rocker arms. The roller bearings are rough and would need to be replaced. Also one managed to jump off the valve tip and needs to be totally replaced as the body of the rocker arm is damaged.
: 5100052 through 5102717 for the first recall
: 5100052 thru 5111116 for the second recall.
The LT4 also uses 10mm studs. Unless you plan on changing them out to 3/8 or 7/16 you'll have limited choices on rockers.
Race Director
Joined: Feb 2003
Posts: 11,672
Likes: 20
From: Lake Wylie SC
I installed Crane's Gold narrow body self aligning roller rockers on my LT1. I stayed with the 1.5 ratio as Crane said coil bind might be a problem with the 1.6 rato. A set of LT4 springs would take care of that. Also crane required different pushrods for the roller rockers. At the time, I didn't know much about tuning the ECM so I stayed with the OEM ratio rockers. These 1.5 rockers will be going to my son's Camaro and I'll be upgrading to 1.6's now that I know what has to be done. BTW, the gold ones look good, too.
Last edited by Strick; Dec 30, 2007 at 12:18 PM.
Team Owner
Joined: Oct 2004
Posts: 35,065
Likes: 0
From: Bergen County, NJ Democrats, doing for the country what they did for Michigan
I used the CA-1318-16 COMP Cams Pro Magnum Roller Rocker Arms without clearance issues (except drip tabs). These are steel and run very well.
Though I made the mistake of keeping the 3/8 stud vice changing them out for the 7/16 version. If you thinking about stepping up in power later via better cylinder heads, the 7/16 will help to keep everything aligned.
For the record converted a head (fastburn) removing the guide plates and required ARP longer studs. The heads were raised port. The guide plates are not necessary for self aligning rockers...even the one used just for assembly as the L98 heads
One thing is common though is the need for a 0.100" longer push rod. Hyd lifters forgive up to 0.050ish of improper length, but the 0.100" will help get in the ball park. Read up on how to properly check contact pattern with the valve tip.
Though I made the mistake of keeping the 3/8 stud vice changing them out for the 7/16 version. If you thinking about stepping up in power later via better cylinder heads, the 7/16 will help to keep everything aligned.
For the record converted a head (fastburn) removing the guide plates and required ARP longer studs. The heads were raised port. The guide plates are not necessary for self aligning rockers...even the one used just for assembly as the L98 heads
One thing is common though is the need for a 0.100" longer push rod. Hyd lifters forgive up to 0.050ish of improper length, but the 0.100" will help get in the ball park. Read up on how to properly check contact pattern with the valve tip.
That's what I used. I used Comp guide plates. I got the non-self aligning version since I had guide plates.I'd measure the pushrod, don't just pick one.
Melting Slicks
Joined: Jun 2004
Posts: 3,253
Likes: 2
From: Castro Valley CA
Race Director
Joined: Jan 2002
Posts: 12,264
Likes: 88
From: O'Fallon Missouri
I've used Crane Gold 3/8 1.6 self-aligning, Comp Cams Pro Magnum 3/8 1.6 self-aligning, and currently running Comp Cams Pro Magnum 7/16 1.6 non self-aligning roller rockers. They are all a quality rocker, but it seemed like the Cranes were a bit quieter.
