Anyone use speed master roller rockers?

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I have some for a BBC that I haven't used yet. Got them as part of an unbelievable black Friday deal. I'm gonna give them a shot on a mild grind solid flat, around 550 lift. I don't think I would trust them over .600
Edit. Gonna have to run Hughes rockers on my victors. Not looking forward to that bill. Wish I could run PRW stainless.
 
They fit like crap is what a friend said. The pattern was way off.
 
toolmanmike said:
They fit like crap is what a friend said. The pattern was way off.
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That could account for most rockers.
The Chinese aluminum body rocker will be dead center while a comp or prw will be to the exhaust side of the stem.
Now let's go back in time where we had stamped rockers and regular 273 Mechanicals and no one cared about a rocker sweep pattern or checked. How many were on and how many were off ? That one motor that ran so good lol
 
I disagree I bought some on Black Friday just got them set up a few days ago I felt overall they were pretty good part for the money. I'm happy with them. the sweep lined up good and they are definitely fairly beefy they locked down tight and overall I'm happy with them they are the extruded aluminum roller tip model. They do appear to have a steel bushing I would have rather had bronze .
I would trust them at about 450lb on the nose or so.

IMG_20220115_173530751.jpg
 
There was someone here that had just bought a stroker big block dart, with speedmaster Victor knockoffs. I'm sure it had speedmaster offset rockers too. He had a thread to i.d. his heads. Maybe he can chime in.
Big block Victor rockers:
Speedmaster $300
Hughes $900
T&D $2000.
 
I used the s/s ones on a SB Chebby, only short amount of run time, but so far so good. Mild hyd FT cam.
 
The stainless Speedmaster rocker arm is the same as the PRW stainless. When comparing the 2 the roller axle is the difference.
They are built in a different room. lol
 
MOPAROFFICIAL said:
That could account for most rockers.
The Chinese aluminum body rocker will be dead center while a comp or prw will be to the exhaust side of the stem.
Now let's go back in time where we had stamped rockers and regular 273 Mechanicals and no one cared about a rocker sweep pattern or checked. How many were on and how many were off ? That one motor that ran so good lol
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The Chinese stainless will likely have retainer clearance issues if the geometry is not corrected.
 
fishmens67 said:
The stainless Speedmaster rocker arm is the same as the PRW stainless. When comparing the 2 the roller axle is the difference.
They are built in a different room. lol
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I think I noticed that too when I seen them side-by-side. I have a set brand new I never used because they didn't clear the Springs at the time , I think they were about a 1.46 spring.iirr prw we're like 460 bucks last time I bought them. They were bronze bushed.
Idk if speed masters are. The ones i have aren't , but maybe they're old pro comp..hmm
 
I have a set of big block Speedmaster stainless, they have bronze bushing, identical to the PRW except for the roller axle.
 
fishmens67 said:
I have a set of big block Speedmaster stainless, they have bronze bushing, identical to the PRW except for the roller axle.
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There's some that look like a knockoff of the prws that have no bushing at all. I have some . Never used'em. Used the Chinese needle bearing types but not those. My main arms are comps..and MP bushed 273 advertised 7500 rpm iron rockers with shafts.
 
MOPAROFFICIAL said:
Your stem height and results will vary.

They design them around a factory height..and after some valve jobs and new valves..that's changed.
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I think clearance would still be an issue with a 1.550" dia spring
 
The reason the PRW/SM SBM rockers have a spring clearance issue is because they patterned them after the Comp BB rocker body design instead of their SB design.

2D45BAEC-5DE6-4276-BDEE-6F89C9BEB99D.jpeg


EC490A32-D2FC-4D79-B8A1-AAC4B1D3493B.jpeg


On an ootb SM Aluminum Head the PRW rockers had hard contact with the retainer, and the roller was way up off the valve tip.
A Crane Gold and the Comp rocker both had tons of clearance.
 
K.O. SWINGER said:
I disagree I bought some on Black Friday just got them set up a few days ago I felt overall they were pretty good part for the money. I'm happy with them. the sweep lined up good and they are definitely fairly beefy they locked down tight and overall I'm happy with them they are the extruded aluminum roller tip model. They do appear to have a steel bushing I would have rather had bronze .
I would trust them at about 450lb on the nose or so.

View attachment 1715861897
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Theres nothing to disagree with here in this thread, stem heights between your heads vs others can be different.. so we are just sharing our experiences here and yours was good, which I am definitely glad to hear. There is gonna be yays and nays expectedly because we dont have the same heads or machinists....so its differnt heads, ,different spring diameters, different amounts of seat grinding/stem height, valve lengths etc... we are bound to have different experiences/turn outs...but this does give us all good info if shared in its entirety. We can know with what stem height, spring will work on such n such head perhaps.
Can I ask you, are they bushed or bearing type? Thanks for sharing btw.
 
PRH said:
The reason the PRW/SM SBM rockers have a spring clearance issue is because they patterned them after the Comp BB rocker body design instead of their SB design.

View attachment 1715862070

View attachment 1715862071

On an ootb SM Aluminum Head the PRW rockers had hard contact with the retainer, and the roller was way up off the valve tip.
A Crane Gold and the Comp rocker both had tons of clearance.
Click to expand...
Let's see the top of that prw for its ratio designation. We know the comp is a 1.5 ,since they don't have that style in 1.6 last I checked. Maybe in the future they will.
It will keep it crystal clear for future readers 'info wise'.
 
fishmens67 said:
I think clearance would still be an issue with a 1.550" dia spring
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Typically, hell yes.
Now.. if you implement a b3racing geometry kit... that can be remedied.
The rocker is picked up mostly and brought back some away from the spring/valve.

I'm waiting for a kit to show up from mike now, it has taken some time... but when it does get here I will share some photos using different springs to show what could fit with this kit. It's a $200 problem solver/ power increaser/parts saver...at least I'm hoping and in theory...though like anything... I do expect to have to grind the push rod holes toward the valve cover. It is mostly infrequent that you solve an issue and not create another one when working with existing design restraints .
 
The PRW rocker I posted the pic of was a 1.5...... although that wouldn’t affect what’s going on with the valve side of the rocker.
 
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