Roller Rockers
Drifting
Joined: Feb 2010
Posts: 1,310
Likes: 99
From: Arlington Texas
I personally have Harland Sharp but I have trick flow heads and after market rockers are recomended for them. Alot of people like the Yella Terras and Jessels can be really expensive. The main thing about them is setting them up correctly.
Thread Starter
Drifting
Joined: Jan 2010
Posts: 1,447
Likes: 1
From: Katy TX
What heads are you running? If aftermarkets arent recomended like with the trick flow heads then stick with your stock rockers. There is lots of research and threads on this topic. The stock rockers have one of the best swipe patterns and are light. The only problem people have with is the needle bearing coming. Comp Cams sells an upgrade kit for the stock rockers that prevents this and it cost about 1/3 of after market rockers.
I personally have Harland Sharp but I have trick flow heads and after market rockers are recomended for them. Alot of people like the Yella Terras and Jessels can be really expensive. The main thing about them is setting them up correctly.
I personally have Harland Sharp but I have trick flow heads and after market rockers are recomended for them. Alot of people like the Yella Terras and Jessels can be really expensive. The main thing about them is setting them up correctly.
Last edited by All_Motor_C5LS6; Mar 24, 2011 at 04:34 PM.
Safety Car
Joined: Oct 2007
Posts: 3,903
Likes: 1
From: You know your drunk when you swerve to miss the tree then you realize its your air freshener! Covington Ga
Theres really no point in doing after market rockers.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
I would disagree with that statement and it is the whole reason aftermarket heads recommend roller rockers rather then stockers. I tried to get my stockers to work on both Dart and AFR heads, wipe pattern was very wide and uncorrectable. My Yella Terra's, properly set up, came up with a pattern perfectly centered and 0.045" wide which will help minimize side loads on my guides. Here's what Tony thinks: Link
Last edited by vettenuts; Mar 24, 2011 at 07:36 PM.
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Le Mans Master
Joined: Dec 2006
Posts: 7,251
Likes: 16
From: Phoenix Arizona
do you guys know why the stock rockers don't have rollers? I am pretty sure it is so the valve spins. and the reason most after market guys have the roller tips is because that is the cheapest and strongest way to mount a tip on aluminum.
the stock rockers are quite good and good for the motor. if the swipes were bad on the valves, it may have been assembled wrong or abused.
who would abuse a corvette?
butwth massive cams and big *** valves/heads, you need aftermarket 
the stock rockers are quite good and good for the motor. if the swipes were bad on the valves, it may have been assembled wrong or abused.
who would abuse a corvette?
but
wth massive cams and big *** valves/heads, you need aftermarket
Tech Contributor
Joined: Sep 2005
Posts: 1,731
Likes: 82
From: New Market AL
You have that rather backwards my friend. The stock rockers are no doubt a lot cheaper to manufacture with a flat tip than adding a roller bearing tip.Until you have marked the end of a valve and rotated the cam through it's lift cycle, you may not fully understand what Vettenuts is talking about. It doesn't take a large cam (i.e. my 224/230) for side loading with stock rockers to become a real problem. Not saying that stock rockers aren't strong - just that the flat tip absolutely will not give you a tight contact patch on the valve tip once you increase cam lift.
I would encourage you to actually pull a couple rockers off, mark them, and then come back and comment in this thread.
and to the OP - any of the rockers that you listed will be quality pieces. Find a good price and buy them.
Former Vendor
Joined: May 2005
Posts: 3,749
Likes: 4
From: Valencia Ca
for what it's worth, here's what I've seen over the years...
1 - The stock rocker arm is excellent- especially with the above mentioned Comp Cams trunnion upgrade
* Rigid and lightweight
* Low Cost
* Carry High RPM without "nosing-over"
* Reliable and easily available
2 - Lower Cost Roller Rockers
* many will nose over above 6500 RPM ( tip weight)
* Most are not adjustable
* Some require a taller valve cover or valve cover spacer
* Available in offsets and various ratios
3 High end roller rocker arms - Jesel, Crower, T&D -
* Available in all ratios as well as adjustable and non-adjustable.
* Available in any offset or ratio
* Require a taller valve cover or valve cover spacer
* May require cylinder head machining to mount
1 - The stock rocker arm is excellent- especially with the above mentioned Comp Cams trunnion upgrade
* Rigid and lightweight
* Low Cost
* Carry High RPM without "nosing-over"
* Reliable and easily available
2 - Lower Cost Roller Rockers
* many will nose over above 6500 RPM ( tip weight)
* Most are not adjustable
* Some require a taller valve cover or valve cover spacer
* Available in offsets and various ratios
3 High end roller rocker arms - Jesel, Crower, T&D -
* Available in all ratios as well as adjustable and non-adjustable.
* Available in any offset or ratio
* Require a taller valve cover or valve cover spacer
* May require cylinder head machining to mount
Thread Starter
Drifting
Joined: Jan 2010
Posts: 1,447
Likes: 1
From: Katy TX
for what it's worth, here's what I've seen over the years...
1 - The stock rocker arm is excellent- especially with the above mentioned Comp Cams trunnion upgrade
* Rigid and lightweight
* Low Cost
* Carry High RPM without "nosing-over"
* Reliable and easily available
2 - Lower Cost Roller Rockers
* many will nose over above 6500 RPM ( tip weight)
* Most are not adjustable
* Some require a taller valve cover or valve cover spacer
* Available in offsets and various ratios
3 High end roller rocker arms - Jesel, Crower, T&D -
* Available in all ratios as well as adjustable and non-adjustable.
* Available in any offset or ratio
* Require a taller valve cover or valve cover spacer
* May require cylinder head machining to mount
1 - The stock rocker arm is excellent- especially with the above mentioned Comp Cams trunnion upgrade
* Rigid and lightweight
* Low Cost
* Carry High RPM without "nosing-over"
* Reliable and easily available
2 - Lower Cost Roller Rockers
* many will nose over above 6500 RPM ( tip weight)
* Most are not adjustable
* Some require a taller valve cover or valve cover spacer
* Available in offsets and various ratios
3 High end roller rocker arms - Jesel, Crower, T&D -
* Available in all ratios as well as adjustable and non-adjustable.
* Available in any offset or ratio
* Require a taller valve cover or valve cover spacer
* May require cylinder head machining to mount
What do you mean by "nosing over"?
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
for what it's worth, here's what I've seen over the years...
1 - The stock rocker arm is excellent- especially with the above mentioned Comp Cams trunnion upgrade
* Rigid and lightweight
* Low Cost
* Carry High RPM without "nosing-over"
* Reliable and easily available
2 - Lower Cost Roller Rockers
* many will nose over above 6500 RPM ( tip weight)
* Most are not adjustable
* Some require a taller valve cover or valve cover spacer
* Available in offsets and various ratios
3 High end roller rocker arms - Jesel, Crower, T&D -
* Available in all ratios as well as adjustable and non-adjustable.
* Available in any offset or ratio
* Require a taller valve cover or valve cover spacer
* May require cylinder head machining to mount
1 - The stock rocker arm is excellent- especially with the above mentioned Comp Cams trunnion upgrade
* Rigid and lightweight
* Low Cost
* Carry High RPM without "nosing-over"
* Reliable and easily available
2 - Lower Cost Roller Rockers
* many will nose over above 6500 RPM ( tip weight)
* Most are not adjustable
* Some require a taller valve cover or valve cover spacer
* Available in offsets and various ratios
3 High end roller rocker arms - Jesel, Crower, T&D -
* Available in all ratios as well as adjustable and non-adjustable.
* Available in any offset or ratio
* Require a taller valve cover or valve cover spacer
* May require cylinder head machining to mount
What do you think of the SLP 1.85s? They are the stock rocker arm with the Comp trunion upgrade installed by Comp and made into 1.85 rockers.
Ed
Former Vendor
Joined: May 2005
Posts: 3,749
Likes: 4
From: Valencia Ca
Former Vendor
Joined: May 2005
Posts: 3,749
Likes: 4
From: Valencia Ca
No problems here. Just bear in mind the physics and geometry associated with increased ratios and don't get greedy - i.e., cracking open valves well past lobe designs or cylinder fill capability.
Team Owner
Joined: Dec 2008
Posts: 35,874
Likes: 1,600
From: Honolulu HI
Le Mans Master
Joined: Nov 2003
Posts: 8,308
Likes: 157
From: NJ
Jesels are the best hands down.
A cheaper alternatine is a yella terra lightweight rockers.
My 346 h/c made peak hp just over 7000rpms and lost about 10 hp up to 7500rpms.
Swipe pattern and geometry is important.
A cheaper alternatine is a yella terra lightweight rockers.
My 346 h/c made peak hp just over 7000rpms and lost about 10 hp up to 7500rpms.
Swipe pattern and geometry is important.
Safety Car
Joined: Oct 2000
Posts: 4,949
Likes: 10
From: Monticello MN
Ed
