Who makes a good stamped steel rocker arm?

one pontiac · 04-06-2009, 08:09 PM

The stock rockers I use are strong enough, but the 1.5 rocker ratio is more like 1.35 to 1.45. Crane and Compcams sell some, but are they better, correct ratio, stronger? Any comments? thank you

Alan Roehrich · 04-06-2009, 08:22 PM

Crane is not selling anything, they are out of business.

What are these rockers being used on?

Have you checked to make sure you have the correct pushrods?

one pontiac · 04-06-2009, 08:39 PM

pontiac stocker, compcams 7262 pushrods

Alan Roehrich · 04-06-2009, 08:47 PM

Those pushrods may or may not be the correct length. Incorrect pushrod length can upset the geometry of the valvetrain, and make the rockers appear to have the wrong ratio. In particular, stud mounted rockers are very easily affected by the wrong pushrod length. Rockers are not truly one ratio to begin with, they change ratio as they travel through their arc of motion. I can gain or lose 0.040" lift by varying the pushrod length.

Bill Edgeworth · 04-07-2009, 12:52 AM

Do yourself a favor and get a pushrod length checker and figure out what length you need.
Those are stock length and I have had to use longer than stock in my motors to get correct lift. Depending on the length of your valves and how your heads are prepped they could need to be significantly longer than stock.
Also if you are using a mechanical lifter to check instead of a shimmed up hydraulic the pushrod seat may be deeper in the lifter. It’s VERY important that your checking lifter and the ones you run measure the same. If they don’t your lift will not be the same.

04-07-2009, 08:28 AM

You might be getting deflection. No matter what arm I used or what pushrod I use I get about .025 to .035 deflection. Tried to solve it once. got nowhere. This was checking it with a solid lifter and the actual race spring. If you roll it with a checker spring the lift will be way over. Lobe lift and pushrod lenth is the only way to solve it. Jockety the stuff around untill you get the desired result. Good luck

04-06-2009, 08:09 PM	#1
one pontiac Junior Member Join Date: Jun 2007 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Who makes a good stamped steel rocker arm? The stock rockers I use are strong enough, but the 1.5 rocker ratio is more like 1.35 to 1.45. Crane and Compcams sell some, but are they better, correct ratio, stronger? Any comments? thank you

04-06-2009, 08:22 PM	#2
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,118 Likes: 1,576 Liked 1,837 Times in 417 Posts	Re: Who makes a good stamped steel rocker arm? Crane is not selling anything, they are out of business. What are these rockers being used on? Have you checked to make sure you have the correct pushrods? __________________ Alan Roehrich 212A G/S

04-06-2009, 08:39 PM	#3
one pontiac Junior Member Join Date: Jun 2007 Posts: 7 Likes: 0 Liked 0 Times in 0 Posts	Re: Who makes a good stamped steel rocker arm? pontiac stocker, compcams 7262 pushrods

04-06-2009, 08:47 PM	#4
Alan Roehrich Veteran Member Join Date: May 2006 Location: Murfreesboro TN Posts: 5,118 Likes: 1,576 Liked 1,837 Times in 417 Posts	Re: Who makes a good stamped steel rocker arm? Those pushrods may or may not be the correct length. Incorrect pushrod length can upset the geometry of the valvetrain, and make the rockers appear to have the wrong ratio. In particular, stud mounted rockers are very easily affected by the wrong pushrod length. Rockers are not truly one ratio to begin with, they change ratio as they travel through their arc of motion. I can gain or lose 0.040" lift by varying the pushrod length. __________________ Alan Roehrich 212A G/S

04-07-2009, 12:52 AM	#5
Bill Edgeworth Member Join Date: Oct 2006 Location: Tacoma, WA Posts: 258 Likes: 0 Liked 0 Times in 0 Posts	Re: Who makes a good stamped steel rocker arm? Do yourself a favor and get a pushrod length checker and figure out what length you need. Those are stock length and I have had to use longer than stock in my motors to get correct lift. Depending on the length of your valves and how your heads are prepped they could need to be significantly longer than stock. Also if you are using a mechanical lifter to check instead of a shimmed up hydraulic the pushrod seat may be deeper in the lifter. It’s VERY important that your checking lifter and the ones you run measure the same. If they don’t your lift will not be the same. __________________ Bill Edgeworth 6471 STK

04-07-2009, 08:28 AM	#6
Todd Hoven Guest Posts: n/a	Re: Who makes a good stamped steel rocker arm? You might be getting deflection. No matter what arm I used or what pushrod I use I get about .025 to .035 deflection. Tried to solve it once. got nowhere. This was checking it with a solid lifter and the actual race spring. If you roll it with a checker spring the lift will be way over. Lobe lift and pushrod lenth is the only way to solve it. Jockety the stuff around untill you get the desired result. Good luck