'pro comp' roller rockers

[Pentastar 01]

nevr seen these Mancini Racing Aluminum Roller Rocker Arms

these look killer and are what Santa gonna bring
Hughes Engines

 

[TrailBeast]

Do you have firsthand use knowledge of these particular rocker arms?

I have asked the same exact same question as the OP on here before and have yet to hear from someone that has direct hands-on experience with the Pro-Comp rockers on a Mopar.

Yet that wasn't enough of a clue apparently.
I don't use bottom of the line tubes in my dirtbike tires, but I have no first hand experience with them either.
I can however tell you how many bikes I have waited for on the trail while they dealt with a flat from them.

 

[Old Man Mopar]

I have no first hand experience with them either.
I can however tell you how many bikes I have waited for on the trail while they dealt with a flat from them.

So how many engines have you personally seen damaged specifically by these rocker arms?

 

[TrailBeast]

So how many engines have you personally seen damaged specifically by these rocker arms?

None, because no one I know of personally would or has used them.
Maybe I should have answered "Yes I have had personal experience with them" since no one I know will use them.
I don't have to taste a rotten walnut myself to know a rotten walnut tastes like ****.

 

[Pentastar 01]

just doing some work
Speedmaster/Procomp Heads - New combo kit???
there is a member StealthWedge67 on this form using them
Anyone using these rocker arms? | Unlawfl's Race & Engine Tech | Moparts Forums

 

[Pentastar 01]

Jegs sells the speedmaster stuff so i emailed them,they said they would NOT recommend them on a race car,But see no worries on a street car. they sell a ton of the stuff and quality has dramatically improved within the last couple of years..
case closed

 

[famous bob]

None, because no one I know of personally would or has used them.
Maybe I should have answered "Yes I have had personal experience with them" since no one I know will use them.
I don't have to taste a rotten walnut myself to know a rotten walnut tastes like ****.

rotten walnuts taste like old leather ! I`m a black walnut ice cream expert !!

 

[B3RE]

Jegs sells the speedmaster stuff so i emailed them,they said they would NOT recommend them on a race car,But see no worries on a street car. they sell a ton of the stuff and quality has dramatically improved within the last couple of years..
case closed

Any part CAN fail. But, proper application, and proper installation, will reduce the risk of failure drastically. If someone bolts a rocker meant for a flat tappet with up to 300# spring pressure on a head with 500# springs and a solid roller, doesn't make the geometry right, and doesn't prelube, among other things, it is probably going to fail. They have no reason to blame the parts, but they do anyway. After all, the parts can't defend themselves.

I've used the stainless rockers on a 500+ hp big block without failure. I have not used the aluminum rockers, but I have a customer supplied, small block set in the shop now for a street/strip build. We'll see how they hold up.

 

[Ben Treinen]

Hello everyone, I figured I'd resurrect an old topic for my first post here, I've got a 440 with these Procomp rockers, I bought this car a year ago . My first 3k miles with them have been ok however they are clattery and I am struggling to get them adjusted and running quiet after a couple attempts. Full disclosure im pretty new to this stuff so I've been trying to find manufacturer specs on these things to either adjust preload or ideally replace them. Are these the same as the Speedmaster rockers? I've got hydraulic lifters (unknown), camshaft (unknown), and these iffy rockers and would just like to get them adjusted and running quiet. If I can answer any questions about these since I'm stuck with them, ill do my best to accommodate, thanks everyone! -Ben

 

[BSB67]

Your noise is likely due to the lifters, not the rockers. People spend enormous time and energy trying to adjust the noise out. Some claim they have some success, but it’s still a lifter problem that you’re putting a band-aid on.

 

[PRH]

Ben T-

Looks like you have the Pro Comp “Victor” copies on that engine.

There aren’t many rocker options for those heads, and iirc the non-PC options are considerably more expensive.

I’d start by going thru the lifter preload adjustment from scratch….and set them to 3/4 turn preload(from zero lash).

 

[Newbomb Turk]

Hello everyone, I figured I'd resurrect an old topic for my first post here, I've got a 440 with these Procomp rockers, I bought this car a year ago . My first 3k miles with them have been ok however they are clattery and I am struggling to get them adjusted and running quiet after a couple attempts. Full disclosure im pretty new to this stuff so I've been trying to find manufacturer specs on these things to either adjust preload or ideally replace them. Are these the same as the Speedmaster rockers? I've got hydraulic lifters (unknown), camshaft (unknown), and these iffy rockers and would just like to get them adjusted and running quiet. If I can answer any questions about these since I'm stuck with them, ill do my best to accommodate, thanks everyone! -Ben

View attachment 1716366709

If you did not verify the geometry is correct you need to.

There is a .001% chance the geometry is correct.

B3racingengines.com has 4 tech articles on this very subject.

Read them all and then call Mike at B3. He will take care of you.