Very good Rocker arm comparison from Mopar Action Magazine .....................

[tactransman]

Since there was a recent discussion on this topic,I thought I would post this article for everyone to read. Enjoy!

[dutch]

thanks for posting....  very interesting   

[Jacksboys]

Thanks for the article.  I have a set of the SB 1.6 Crane Iron rockers in my garage that I plan to use on an engine in the future.  The only bad thing I have heard about them is that the adjustment screws had a bad batch and can fail, but they have supposedly fixed the problem on the new ones.

[Ornamental]

Thank you for posting, much appreciated! 
The scans have been saved to my laptop.

[nivvy]

Harland Sharp will make you 1.7's ......... 

[AMXguy]

So for a pretty much stock 6 pack 440 build using stock valve covers what set up would you go with? I was thinking I'd get the Crane set up but now I'm not sure, maybe I should just stay stock. I just want to set them and forget it I'm not into all the race car stuff.

[dodge freak 2]

I went with the aftermarket cast iron rockers on my SB...alum. can break on the street unless you are inspecting them often. They break and there needle bearings all over and in the oil pan.

Sure the race stuff is nice but only if you got money to burn.

Hughes engines has some nice looking ones at a fair price and their cams are pretty wild, so you should think their rockers would be strong.


EDIT...what the story fails to say is use a stud kit to hold the shafts down, Hughes has them...I had a bolt break this last summer, was able to get the broken piece out of the head and found the hold down but the head part of the bolt is down in my oil pan somewhere. I see no reason to use bolts now.

[LAA66]

 Thanks for the article, strikes a familiar note. I am on my 2nd set of non bushed adjustable iron rockers and third set of adjustment studs. The old Sig Erson RA's galled at the pressure points on the shaft ruining both. The studs also came loose in time and wouldn't hold their adjustment. Another set of rockers with lock nut studs (MP I believe)started breaking at the nut/rocker juncture. This is on a 340 with less than .500 lift. 

   

[dodge freak 2]

I believe I have those rockers--thats what the E-bay seller said they were--I use thread lock and no lock nut and the shafts are banna grooved . Thread lock works really well. Its tough to turn but still can be done and if they feel too loose, another drop of thread lock takes care of it...just don't use the super strong stuff.

[nivvy]

It says the iron rockers are only good to 400lbs of pressure.... I was running 658lbs so iron is not an option for me... 

I love my harlands and are a supporter of needle bearing rockers.... people who break may have not been setup or or not had the right rocker for application.... Indy will tell you not to use there rockers past a certian point of pressure and lift and indy will actually suggest to you to use harlands 

lock tight on the studs.. am i reading that right,,,, maybe for heads that oil through the #4 cam bearing.... 

[dodge freak 2]

 harlands are nice but were out of my budget. No, its the adjuster screws that have thread lock on them...I know, pictures all show nuts on top that you tighen down but these came to me with no nuts and were tough to turn..some got a little loose when I adjusted them, so I used thread lock..the red stuff and they are fine.

It works for my little guy, been a few years too.

[Roppa440]

I have fitted the Hughes rockers. I was very impressed by them. Quality bit of kit.

The only drawback is trying to catch Dave Hughes on a good day where he is not ranting.

[arcticmopar]

I have fitted the Hughes rockers. I was very impressed by them. Quality bit of kit.

The only drawback is trying to catch Dave Hughes on a good day where he is not ranting.

Roppa: did you use the Hughes pushrod kit?
I would like to find 5/16 ball/cup pushrods for my 383, I would perfer not to grind my EDDE heads myself for 3/8 pushrods and I only have a mild hyd cam but need adjustable rockers to stop the noise!

[Roppa440]

I bought the "cut to length" pushrods they were selling at the time. I figured they were strong enough for my application (but I bought spares just in case) and I wanted to make sure they were exactly the correct length to just show a couple of adjuster threads on the underside of the rocker when adjusted correctly.
Plus I have one lifter slightly taller than all the rest due to having to replace one.

[Marquis_Rex]

Excellent article. Thanks alot. I've just changed my rockers and shafts and pusrods.
I've gone for Harland Sharpe 1.6 ratio ones.
I probably didnt need them. Sure, I'm running a wild cam, but I have comp hydraulic 'high energy' lifters so perhaps I wont be able to use the high rev potential of the Harlands.
Still, it's made me feel better