roller rockers

R. Thorne · 06-19-2013, 11:57 AM

Just curious if anybody has changed to roller rockers and noticed any real world improvement in performance (specifically decreased flexing and or horsepower improvement) or durability over oem type rockers. This is on a Pontiac stocker application, but Chevrolet input is also appreciated. Send me a PM if you prefer. Thanks, Ron.

njk53 · 06-19-2013, 01:21 PM

We just went to a roller rocker (Comp Cams Stainless) after putting 4 pushrods through the stamped steel rocker push rod pocket. Also damaged 4 Shubeck lifters. Also had to change the push rods because the length changes with the new rocker arms. Will have the car out next weekend and will let you know if we pick up some HP.

Patrick Kelliher · 06-19-2013, 03:16 PM

we haven't seen any significant performance changes. We just wanted some piece of mind after punching a few stamped steel ones. we just have some basic Harland Sharps .

njk53 · 06-20-2013, 10:14 AM

We went with the Comp Cams Stainless rockers for two reasons, they are more durable than aluminum and they are rebuildable. They are a bit heavier than aluminum but aluminum fatigues and can break over time. I couldn't get the stories of aluminum rockers breaking and spilling roller bearings into the motor out of my head so, we went with the stainless for piece of mind.
I'm sure the better billet rockers don't have that problem as much as they once did.

Dave Ribeiro · 06-20-2013, 10:53 AM

Ron, you have a PM............

R. Thorne · 06-20-2013, 11:37 AM

Dave, you have a pm.

Bill Edgeworth · 06-20-2013, 01:44 PM

I have tried them all.
It’s interesting with the exact same peak lift my Holroyd ones are faster than my Harland-Sharp ones. Just a matter of the geometry of a stamped steel rocker vs. a roller rocker producing a different lift curve. I’ve never broken one of the Holroyd’s or Harland Sharp (knock on wood). I used to break the same punched steel ones all the time before I had Holroyd modify them for me. Only roller rockers I have ever broke were Crane on a big block Mopar. On that after changing to T&D I never had another problem.

R. Thorne · 06-20-2013, 02:48 PM

Thanks to all who replied here and PM's and to Randy Jr. at HarlandSharp. Bill, did the standard Harland Sharps (s6001) check the same max lift as the oems/Holroyd (ie same ratio or slightly higher) ? Anybody else notice any difference in their max lift after changing to roller rockers?Thanks, Ron.

Bill Edgeworth · 06-20-2013, 04:35 PM

Quote:

Originally Posted by R. Thorne

Thanks to all who replied here and PM's and to Randy Jr. at HarlandSharp. Bill, did the standard Harland Sharps (s6001) check the same max lift as the oems/Holroyd (ie same ratio or slightly higher) ? Anybody else notice any difference in their max lift after changing to roller rockers?Thanks, Ron.

Harland Sharp produced higher lift, a shorter pushrod was required. Even the modified punched steel ones still flex.

R. Thorne · 06-20-2013, 05:28 PM

Thanks, Bill, any particulars (how much more lift and how much shorter pushrods?). Also, were the Harland Sharp rockers the standard ones, diamond series, or HD ones? PM me if you prefer. Thanks, Ron.

06-19-2013, 11:57 AM	#1
R. Thorne Member Join Date: May 2009 Posts: 182 Likes: 61 Liked 100 Times in 33 Posts	roller rockers Just curious if anybody has changed to roller rockers and noticed any real world improvement in performance (specifically decreased flexing and or horsepower improvement) or durability over oem type rockers. This is on a Pontiac stocker application, but Chevrolet input is also appreciated. Send me a PM if you prefer. Thanks, Ron.

06-19-2013, 01:21 PM	#2
njk53 Senior Member Join Date: Jul 2007 Location: East China, MI Posts: 504 Likes: 0 Liked 0 Times in 0 Posts	Re: roller rockers We just went to a roller rocker (Comp Cams Stainless) after putting 4 pushrods through the stamped steel rocker push rod pocket. Also damaged 4 Shubeck lifters. Also had to change the push rods because the length changes with the new rocker arms. Will have the car out next weekend and will let you know if we pick up some HP. __________________ Nelson Kowal Stock 345

06-19-2013, 03:16 PM	#3
Patrick Kelliher Member Join Date: May 2006 Location: New Hampshire Posts: 124 Likes: 0 Liked 0 Times in 0 Posts	Re: roller rockers we haven't seen any significant performance changes. We just wanted some piece of mind after punching a few stamped steel ones. we just have some basic Harland Sharps .

06-20-2013, 10:14 AM	#4
njk53 Senior Member Join Date: Jul 2007 Location: East China, MI Posts: 504 Likes: 0 Liked 0 Times in 0 Posts	Re: roller rockers We went with the Comp Cams Stainless rockers for two reasons, they are more durable than aluminum and they are rebuildable. They are a bit heavier than aluminum but aluminum fatigues and can break over time. I couldn't get the stories of aluminum rockers breaking and spilling roller bearings into the motor out of my head so, we went with the stainless for piece of mind. I'm sure the better billet rockers don't have that problem as much as they once did. __________________ Nelson Kowal Stock 345

06-20-2013, 10:53 AM	#5
Dave Ribeiro VIP Member Join Date: Sep 2002 Location: Williamsburg, Va.---USA Posts: 1,827 Likes: 1,612 Liked 56 Times in 27 Posts	Re: roller rockers Ron, you have a PM............ __________________ Dave Ribeiro 1033 STK

06-20-2013, 11:37 AM	#6
R. Thorne Member Join Date: May 2009 Posts: 182 Likes: 61 Liked 100 Times in 33 Posts	Re: roller rockers Dave, you have a pm.

06-20-2013, 01:44 PM	#7
Bill Edgeworth Member Join Date: Oct 2006 Location: Tacoma, WA Posts: 258 Likes: 0 Liked 0 Times in 0 Posts	Re: roller rockers I have tried them all. It’s interesting with the exact same peak lift my Holroyd ones are faster than my Harland-Sharp ones. Just a matter of the geometry of a stamped steel rocker vs. a roller rocker producing a different lift curve. I’ve never broken one of the Holroyd’s or Harland Sharp (knock on wood). I used to break the same punched steel ones all the time before I had Holroyd modify them for me. Only roller rockers I have ever broke were Crane on a big block Mopar. On that after changing to T&D I never had another problem. __________________ Bill Edgeworth 6471 STK

06-20-2013, 02:48 PM	#8
R. Thorne Member Join Date: May 2009 Posts: 182 Likes: 61 Liked 100 Times in 33 Posts	Re: roller rockers Thanks to all who replied here and PM's and to Randy Jr. at HarlandSharp. Bill, did the standard Harland Sharps (s6001) check the same max lift as the oems/Holroyd (ie same ratio or slightly higher) ? Anybody else notice any difference in their max lift after changing to roller rockers?Thanks, Ron.

06-20-2013, 05:28 PM	#10
R. Thorne Member Join Date: May 2009 Posts: 182 Likes: 61 Liked 100 Times in 33 Posts	Re: roller rockers Thanks, Bill, any particulars (how much more lift and how much shorter pushrods?). Also, were the Harland Sharp rockers the standard ones, diamond series, or HD ones? PM me if you prefer. Thanks, Ron.