Who's rockers are these?

[PRH]

That was me, but it’s actually only 1.5 intake rockers for the non-Chapman MW stage 6 heads(they are like the rocker in my pic above).

My recollection(which could be totally wrong) is that the Chapman heads used rockers that were specific to those heads, and were made by T&D.

If you could find the 470 build Steve Dulcich did using those heads for one of the Engine Masters contests, there might be some pics of what he used.

Streetwise over on Moparts was also using those heads on a low deck build.

As for the particular rockers this thread is about........ I still try and avoid Chinese rockers if at all possible.

 

[pittsburghracer]

That was me, but it’s actually only 1.5 intake rockers for the non-Chapman MW stage 6 heads(they are like the rocker in my pic above).

My recollection(which could be totally wrong) is that the Chapman heads used rockers that were specific to those heads, and were made by T&D.

If you could find the 470 build Steve Dulcich did using those heads for one of the Engine Masters contests, there might be some pics of what he used.

Streetwise over on Moparts was also using those heads on a low deck build.

As for the particular rockers this thread is about........ I still try and avoid Chinese rockers if at all possible.

Pretty sure Streetwise has the Doctor J heads (Speedmaster) on a small block if I remember right.

 

[pomonamissel]

i have mp setups , just looking for more than those 1.6 can offer up . trying not to bore the cam tunnel .

 

[pomonamissel]

i saw the t&d site . there were many to choose from for the alum champman mw heads , offset is .800 . not many providers of them . t&d is very costly , but there great . and no one says neg about them , but cost .

 

[pishta]

yes, the T&D was some Swiss watch looking stuff. Even the roller tip was on it own bearings with a C-clip to service it. Why use stainless rockers..whats the upside? Stainless fasteners are pretty but are not as strong and corrosion control is no an issue under a valve cover... Just wondering....

 

[PRH]

Pretty sure Streetwise has the Doctor J heads (Speedmaster) on a small block if I remember right.

He also has a low deck BB(517” iirc) with Chapman stage 6’s in a 70 Charger.
It’s probably been over 10 years he’s had that combo together.

 

[yellow rose]

yes, the T&D was some Swiss watch looking stuff. Even the roller tip was on it own bearings with a C-clip to service it. Why use stainless rockers..whats the upside? Stainless fasteners are pretty but are not as strong and corrosion control is no an issue under a valve cover... Just wondering....

They use aluminum because it's relatively cheap and very easy to machine.

Most anybody making rockers today is offering rockers in steel of some form.

Aluminum is for Pistons.

 

[pittsburghracer]

I wouldn't be afraid to run that rocker with spring loads as high as 280 on the seat and 650 or so over the nose as long as the geometry is correct.

That rocker is bushed, like they all should be. When needle bearings are used two things happen.

The body is made significantly weaker because the bearing/race is so damn big where the bushing used in the rocker you have is a nice, thin wall piece so the rocker arm body is much thicker, especially around the spring pocket.

And the roller bearing on a big (bigger than what is used on say a SBC shaft set up) shaft that is hollow presents its own issue. The engineering is over my head, but the upshot has something to do with how the needle carries the load and transmits that load to the shaft. IIRC, the surface of the shaft will actually wad up around the needle and again, IIRC the needle causes the shaft to get a slight indent at that same spot and then it's over.

I should have paid more attention when the guy was talking but I really didn't care as I don't run needle bearings on a reciprocating shaft unless that's the only option.

It was for the junk Chevy rocker system back in the day, and why Chrysler guys want to copy that junk today is beyond me.

That was about my limit for attention length so I skipped every other word at the end. Are you saying you dislike rockers like T&D and Harlan Sharp because they have roller bearings?

 

[yellow rose]

That was about my limit for attention length so I skipped every other word at the end. Are you saying you dislike rockers like T&D and Harlan Sharp because they have roller bearings?

Yes.

 

[pittsburghracer]

Yes.

I could tell you stories about different sets of Harlan Sharp rockers I’ve had but I guess it’s not worth wasting my breath.

 

[yellow rose]

I could tell you stories about different sets of Harlan Sharp rockers I’ve had but I guess it’s not worth wasting my breath.

I could tell you stories of beating the needles out of rockers at 8500 and what the cost is.

A bushed ductile iron rocker or even the Crane rockers are better than the HS crap they sold me.

As for T&D I only use those with bushings in them. Period. If they won't do the bushings (they will but they ***** and moan about it) then I find something else.

Again, aluminum is used because it's cheap to buy and manufacture. Needle bearings were used by the Chevy guys because that's all they had.

Many, many rocker manufacturers now offer steel rockers with bushings. Look at the latest Hemi rockers out there. Steel with bushings. Guys ain't spending $7500.00 on rockers for bragging rights.

 

[pittsburghracer]

Here we go with the rpm again. I think my crap has ran pretty good over the last 40 plus years shifting at 7200 rpm or less. Maybe my plan isn’t that dumb. Lol. Build your stuff to 60 foot well and the rest comes easy. Almost like racing downhill

 

[yellow rose]

Here we go with the rpm again. I think my crap has ran pretty good over the last 40 plus years shifting at 7200 rpm or less. Maybe my plan isn’t that dumb. Lol. Build your stuff to 60 foot well and the rest comes easy. Almost like racing downhill

I've seen them come apart at way less RPM.

Go look at what Manton and Ried are building. They ain't stupid.

I can also tell you that at one time (haven't asked in awhile as I haven't had the reason to) Alan Johnson was talking about building steel bushed rockers for the 481 platform, and it needed it. Got into tire shake and it would start failing rockers. Took a bit to get everyone to figure out what was breaking the rockers.

A guy who was every bit of 6'9" and maybe a bit more who weighed maybe, maybe 200 pounds with his gear on figured it out.

Watching him fold himself up to get in the car was amazing.

Guess I could go to the Johnson web site and see if they ever did it.

 

[yellow rose]

Forgot to mention the greater the rocker offset the quicker the needle bearings fail. At any load. A needle bearing HATES 2 things.

Being used on a reciprocating shaft and uneven loading. Death to needle bearings.

 

[pomonamissel]

i don't want needle bearing , i like bushed rockers . in fact h/s did a set for a rb street driver with a roller cam for my build . it took over a year to get what we ordered , many reasons why and than the wrong parts twice . before the bushed roller tipped rockers arrived . this build is for a customer . with his ride setting in my shop . i'm not sure h/s will ever get more orders from me . they said that they produced 50 setups , but took weeks on months to replace the wrong stuff they sent . but they showed up and their right . i wounder how hughes rockers will be , their 10 plus weeks into that order , again bushed assemblies .

 

[pittsburghracer]

i don't want needle bearing , i like bushed rockers . in fact h/s did a set for a rb street driver with a roller cam for my build . it took over a year to get what we ordered , many reasons why and than the wrong parts twice . before the bushed roller tipped rockers arrived . this build is for a customer . with his ride setting in my shop . i'm not sure h/s will ever get more orders from me . they said that they produced 50 setups , but took weeks on months to replace the wrong stuff they sent . but they showed up and their right . i wounder how hughes rockers will be , their 10 plus weeks into that order , again bushed assemblies .

Harlan Sharp made me eight .350 offset Edelbrock Head rockers (custom order) and I had the 10 days after I called the order in. Great company

 

[yellow rose]

Harlan Sharp made me eight .350 offset Edelbrock Head rockers (custom order) and I had the 10 days after I called the order in. Great company

I've never had an issue getting them either. So I don't know what happened above.

 

[K.O. SWINGER]

Those are ProForm rocker arms as earlier stated extruded aluminum I feel there a good little rocker as long as you don't exceed 500lb on the nose I have run them on my motor they are very light and mine weigh less than stock stamped rockers

 

[K.O. SWINGER]

It did take a bit of work to get them dialed in with shaft shims but the contact patch on the valve was nice and I have had no problems with mine but I only run 325 lb of spring

 

[lead69]

I like my harland sharp/mancini rockers very well,they have an excellent sweep pattern on the trick flow heads and have really nice adjusters and they do not have needle bearings. I got them as singles for just over $300 for all 16, imo they are well worth it.
Mancini Racing Aluminum Roller, 1.5 Ratio