Roller Rocker Help!
Thread Starter
Melting Slicks
Joined: Jun 2016
Posts: 2,979
Likes: 332
From: Woodinville WA
Roller Rocker Help!
Folks,
I've purchased the Jegs version of the Profiler 195cc heads, seen here:
http://www.jegs.com/i/JEGS-Performan...14022/10002/-1
I'm trying to track down a good set of 3/8" stud-mounted stainless 1.6 ratio roller rockers, but I'm confused at a couple of items.
The heads come with guide plates (5/16" flat) -this means that I should use nonself-aligning roller rockers, right?
Does anyone have any recommendations for a specific set to buy?
I was thinking of these, but I don't know if they're Chinese crap or decent: http://www.jegs.com/i/JEGS-Performan...20904/10002/-1
Adam
I've purchased the Jegs version of the Profiler 195cc heads, seen here:
http://www.jegs.com/i/JEGS-Performan...14022/10002/-1
I'm trying to track down a good set of 3/8" stud-mounted stainless 1.6 ratio roller rockers, but I'm confused at a couple of items.
The heads come with guide plates (5/16" flat) -this means that I should use nonself-aligning roller rockers, right?
Does anyone have any recommendations for a specific set to buy?
I was thinking of these, but I don't know if they're Chinese crap or decent: http://www.jegs.com/i/JEGS-Performan...20904/10002/-1
Adam
Thread Starter
Melting Slicks
Joined: Jun 2016
Posts: 2,979
Likes: 332
From: Woodinville WA
I know, but they're literally a 70% price difference; are they 70% better?
After slowly learning about Comp Cams and particularly the XE flat tappets, I always pause to wonder whether their brand name is actually earned on the basis of quality or just marketing dollars spent?
There seems to be a near-universal acclaim for the Ultra Pro Magnum RRs; but MAN, they're expensive.
Adam
After slowly learning about Comp Cams and particularly the XE flat tappets, I always pause to wonder whether their brand name is actually earned on the basis of quality or just marketing dollars spent?
There seems to be a near-universal acclaim for the Ultra Pro Magnum RRs; but MAN, they're expensive.
Adam
Le Mans Master
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From: Lincoln, CA
Le Mans Master
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From: Maryland
St. Jude Donor '05, '09, '15
If you are not stuck on SS these have an excellent reputation on the hot rod forums and are made in USA. I bought a set for my 355 but have not installed them yet.
https://www.summitracing.com/parts/s...1002/overview/
Tom
https://www.summitracing.com/parts/s...1002/overview/
Tom
Le Mans Master
Joined: Apr 2011
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From: Hermosa
All new heads come with guide plates. It doesn't mean you can't use self aligning rockers. You just need to use head bolt washers under the rocker stud to keep the geometry the same, as if the guide plate were still under the stud.
There is no reason you shouldn't go with 7/16" studs if you are buying new rockers. It will provide less deflection of the stud and give better valve train stability.
I personally use crower ss rr's. The comps had some issues as I recall when I researched rockers.
There is no reason you shouldn't go with 7/16" studs if you are buying new rockers. It will provide less deflection of the stud and give better valve train stability.
I personally use crower ss rr's. The comps had some issues as I recall when I researched rockers.
Safety Car
Joined: Nov 2008
Posts: 3,717
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From: Seattle Washington
In my last Motor I used Crower SS Rockers. In my current Motor I used Comp Cam SS Rockers. People used to commit on how quite the valve Train sounded with the Crowers . The Comp Cams make more noise, and my engine builder sez they should compared to the Crowers. This make no sense to me, but its the way it is.
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Race Director
Joined: May 2005
Posts: 10,674
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From: Millington Illinois
St. Jude Donor '08-'09
If your on a budget these are good quality for the money.
https://www.summitracing.com/parts/c...make/chevrolet
https://www.summitracing.com/parts/c...make/chevrolet
Burning Brakes
Joined: Feb 2005
Posts: 894
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If your on a budget these are good quality for the money.
https://www.summitracing.com/parts/c...make/chevrolet
https://www.summitracing.com/parts/c...make/chevrolet
On a side note to the OP, the ONLY time we sell ANY 3/8" stud rockers is when the customer just wants a rocker arm change where the heads are not being removed for studs and guide plate machining. Aftermarket heads all get 7/16" AND a set lightweight retainers. These are 2 non-negotiable items included on all our builds.
Thanks, Gary in N.Y.
P.S. Just about all our 100% stock-appearing SB retro-hyd roller units get stainless rollers. We prefer 1.5" x 7/16" but we have every size on the shelf including 1.5, 1.6, with 3/8", and 7/16" studs. No pricing where I am now but I believe they are around $150.00/16. We also have 1.6 (int) x 1.5 (exh) kits as well. These are all for the 7/16" studs.
Thread Starter
Melting Slicks
Joined: Jun 2016
Posts: 2,979
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From: Woodinville WA
Ok guys on the 3/8th vs. 7/16th studs thing, I thought I just had to use what my heads come with... My heads came with 3/8" studs...
The Comp Ultra Pro Magnum 1.6 SBC 3/8th" studs are on sale for $303 on Comp's Amazon store right now and work just gave me a $50 Amazon gift certificate for winning some award so it seems like a no brainer.
-To switch to 7/16" I'd need to buy new studs and replace all the studs in the heads, right? What's this kinda thing cost and what's involved in making the swap?
Adam
Adam
The Comp Ultra Pro Magnum 1.6 SBC 3/8th" studs are on sale for $303 on Comp's Amazon store right now and work just gave me a $50 Amazon gift certificate for winning some award so it seems like a no brainer.
-To switch to 7/16" I'd need to buy new studs and replace all the studs in the heads, right? What's this kinda thing cost and what's involved in making the swap?
Adam
Adam
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The swap is to just unscrew them and install the new ones. Make sure to torque them
properly.
Cost is a set of studs.
Definitely want the 7/16 for anything you're going to flog with a decent cam.
Jim.
properly.
Cost is a set of studs.
Definitely want the 7/16 for anything you're going to flog with a decent cam.
Jim.
Burning Brakes
Joined: Nov 2011
Posts: 1,170
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From: Willoughby Ohio
FWIW my engine is using scorpion rr with 7/16 arp studs and a jomar stud girdle.The only thing I would add on the studs is to use thread sealer to eliminate any oil leaking into the intake ports.
Good luck with your build.
Dave
Good luck with your build.
Dave
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Last edited by Kubs; Dec 7, 2016 at 03:45 PM.
Le Mans Master
Joined: Apr 2011
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From: Hermosa
Ok guys on the 3/8th vs. 7/16th studs thing, I thought I just had to use what my heads come with... My heads came with 3/8" studs...
The Comp Ultra Pro Magnum 1.6 SBC 3/8th" studs are on sale for $303 on Comp's Amazon store right now and work just gave me a $50 Amazon gift certificate for winning some award so it seems like a no brainer.
-To switch to 7/16" I'd need to buy new studs and replace all the studs in the heads, right? What's this kinda thing cost and what's involved in making the swap?
Adam
Adam
The Comp Ultra Pro Magnum 1.6 SBC 3/8th" studs are on sale for $303 on Comp's Amazon store right now and work just gave me a $50 Amazon gift certificate for winning some award so it seems like a no brainer.
-To switch to 7/16" I'd need to buy new studs and replace all the studs in the heads, right? What's this kinda thing cost and what's involved in making the swap?
Adam
Adam
I think the Harland sharps would have been my first pick for the aluminum rockers followed by scorpion.
I would not go too cheap on the rockers it could cost big down the road. The ARP 7/16" studs were not expensive as I recall. The holes in the head accepts 3/8" or 7/16" studs.
Last edited by REELAV8R; Dec 7, 2016 at 03:51 PM.
Thread Starter
Melting Slicks
Joined: Jun 2016
Posts: 2,979
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From: Woodinville WA
What I'm actually looking for is a recommendation; is one clearly "better" than the other?
If not, what are the pros and cons of self-aligning vs. nonself-aligning?
(Should I just stick with nonself-aligning and the guide plates?)
Adam
Le Mans Master
Joined: Apr 2011
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From: Hermosa
You just can't use both at the same time.
It could be that there are high perf roller rockers that are self aligning, I just didn't come across them or look for any.
I went from self aligning to guide plates. Not a real problem. It kind of depends on the design of the guide plate. On my Dart plate I had to cut them in the middle to change the distance between the push rods to get them to align with the rockers. With the AFR guide plates they are of a two piece design, tongue and groove like, this way the distance between the push rods can be adjusted to align with the rockers.
Self aligning was easier to be sure.
Last edited by REELAV8R; Dec 7, 2016 at 05:31 PM.
Le Mans Master
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From: melbourne florida
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Self aligning were made for the tuned port engines so people didn't have to add guide plates to run roller rockers. There is no good reason to use them with a set of heads with guide plates.
Le Mans Master
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Another note, if you are using guide plates make SURE they are hardened as well as use hardened pushrods. If one or neither of them are then they can get torn up pretty quick sending metal bits all throughout the engine.
Team Owner
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From: Reno Nevada
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I install rocker studs with sealant because there are certain thing that i don't like to use loc-tite blue or red on. because it takes heat to dissassemble.
https://www.permatex.com/products/ga...lange-sealant/