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Will Miller mid lift rockers 1.8 be good for a solid roller 272 Dur. .688 lift?

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Will Miller mid lift rockers 1.8 be good for a solid roller 272 Dur. .688 lift? Empty Will Miller mid lift rockers 1.8 be good for a solid roller 272 Dur. .688 lift?

Post  ED468 February 14th 2021, 3:48 am

I found some new ones and thinking about putting them on intake side. Thanks

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Will Miller mid lift rockers 1.8 be good for a solid roller 272 Dur. .688 lift? Empty Re: Will Miller mid lift rockers 1.8 be good for a solid roller 272 Dur. .688 lift?

Post  dfree383 February 14th 2021, 9:10 am

IMO they are not heavy duty enough for a roller springs
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Post  Paul Kane February 14th 2021, 7:43 pm

ED468 wrote:Will Miller mid lift rockers 1.8 be good for a solid roller 272 Dur. .688 lift? I found some new ones and thinking about putting them on intake side. Thanks
The Miller MEI Big Block 1.80 ratio rockers, part number 4580, are made of 7075-T6 aluminum and have a higher destruct level than just about any other commercial stud rocker arm ever made, at 83,000 psi, which is stronger/higher than Crane, H-S, Scorpion, and so on.  They are thereby among the strongest stud rocker bodies.  Also they come with the same brand USA made full compliment needle bearings as used by high-end manufacturers such as Jesel, etc.  Furthermore, if they are going to be installed onto the intake side of standard intake valve angle BBF heads (iron SCJ, TFS Street, Edelbrock, etc) then they have the best design geometry over most every other stud rocker brand of which I am aware.  We have used them on big-cammed, triple-springed solid roller engines running 5500-6000 rpm sustained for literally miles at a time.

The only possible downside would be that if the engine breaks and hurts a rocker arm, spares will be hard to come by, but in my opinion they are still well worth being utilized.  Besides, if you have a set of 16 then you will have eight spares for the intake side where you intend to use them.
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Post  dfree383 February 17th 2021, 3:05 pm

Double tap


Last edited by dfree383 on February 17th 2021, 3:08 pm; edited 1 time in total
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Post  dfree383 February 17th 2021, 3:07 pm

Paul Kane wrote:
ED468 wrote:Will Miller mid lift rockers 1.8 be good for a solid roller 272 Dur. .688 lift? I found some new ones and thinking about putting them on intake side. Thanks
The Miller MEI Big Block 1.80 ratio rockers, part number 4580, are made of 7075-T6 aluminum and have a higher destruct level than just about any other commercial stud rocker arm ever made, at 83,000 psi, which is stronger/higher than Crane, H-S, Scorpion, and so on.  They are thereby among the strongest stud rocker bodies.  Also they come with the same brand USA made full compliment needle bearings as used by high-end manufacturers such as Jesel, etc.  Furthermore, if they are going to be installed onto the intake side of standard intake valve angle BBF heads (iron SCJ, TFS Street, Edelbrock, etc) then they have the best design geometry over most every other stud rocker brand of which I am aware.  We have used them on big-cammed, triple-springed solid roller engines running 5500-6000 rpm sustained for literally miles at a time.

The only possible downside would be that if the engine breaks and hurts a rocker arm, spares will be hard to come by, but in my opinion they are still well worth being utilized.  Besides, if you have a set of 16 then you will have eight spares for the intake side where you intend to use them.

That’s good for you, the Miller rockers I’ve seen are street stuff IMO and I wouldn’t use them for a high end race engine
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