Chinese..
Input on which rockers I should use.
- Thread starter adk-roadrunner
- Start date
For new stamped rockers try Melling MR-850 and MR-851.
Made in USA. I think the Summit has them and they're worlds better to deal with than Mancini.
Made in USA. I think the Summit has them and they're worlds better to deal with than Mancini.
For the cam listed a decent used stamp steel set will be fine. If you want to upgrade get the harlan sharps from mancini w the bushings, there isn't much worth using in between. The ductile stuff is darn near the price of the Harlan sharps.
I just went through this a year or two ago, in case you haven't made a decision yet here's some more food for thought. I have 440 source heads, so your mileage may vary.
In a nutshell, if you can find some quality stamped rockers (I didn't feel like I could but there are some good suggestions on this thread) and you don't want the flexibility down the road, I would skip the rollers.
I sprang for the Harland Sharp rockers since I was having to buy new shafts/rockers anyway and I liked the flexibility to swap the cam out with pretty much anything I wanted. It was a big hit to my budget but there were too many stories about the cheaper rollers out there imploding and taking out the motor. I waited for Mancini to run a 10% off sale and picked them up.
Going to the rollers turned out to be a bit of a pain in the a$$. Long story short, after I *thought* I had checked clearances at least twice, I buttoned it all up. Not sure what made me look one more time, but I found I had a couple of pushrods on each head that were rubbing the head. Pull the heads, clearanced the holes, back together again.
If you do consider the HS's, also consider which set you get, they have S70015K and S70015KE, the KE has a slightly shorter tip length. Not sure which one is right for your heads but I would talk to them on the phone. They recommended the K for 440 source heads, but the reality was once they were on, according to HS the KE would have had a better alignment towards the center of the valve stem. I used this adjustable push rod (Mancini MRE7704-1) and followed the instructions on target number of threads exposed when measuring.
Very happy with them, and they look awesome!!! Until you put the valve covers on...
Good luck!
In a nutshell, if you can find some quality stamped rockers (I didn't feel like I could but there are some good suggestions on this thread) and you don't want the flexibility down the road, I would skip the rollers.
I sprang for the Harland Sharp rockers since I was having to buy new shafts/rockers anyway and I liked the flexibility to swap the cam out with pretty much anything I wanted. It was a big hit to my budget but there were too many stories about the cheaper rollers out there imploding and taking out the motor. I waited for Mancini to run a 10% off sale and picked them up.
Going to the rollers turned out to be a bit of a pain in the a$$. Long story short, after I *thought* I had checked clearances at least twice, I buttoned it all up. Not sure what made me look one more time, but I found I had a couple of pushrods on each head that were rubbing the head. Pull the heads, clearanced the holes, back together again.
If you do consider the HS's, also consider which set you get, they have S70015K and S70015KE, the KE has a slightly shorter tip length. Not sure which one is right for your heads but I would talk to them on the phone. They recommended the K for 440 source heads, but the reality was once they were on, according to HS the KE would have had a better alignment towards the center of the valve stem. I used this adjustable push rod (Mancini MRE7704-1) and followed the instructions on target number of threads exposed when measuring.
Very happy with them, and they look awesome!!! Until you put the valve covers on...
Good luck!
Last edited:
Bee1971
Well-Known Member
Since the Sealed Power are now discontinued , we are running out of options
Those Mellings look identical to the Sealed Power that I have been running for about five summers now
adk-roadrunner
Well-Known Member
I've already bought and installed PRW roller rockers. I thought I updated this above but apparently not. Haven't run yet but we'll see.
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