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Rocker ratio

Posted By CK 11 Years Ago
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CK
Posted 11 Years Ago
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Last Active: 9 Years Ago
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My rocker is confusing me

Thought I'd poise on that.

Well it looks like it's marked as an EAN which is 1.43
Yet it's got numbers 6564
However being the head and deck have had about .100" taken off them the adjuster is pretty much in the middle of its adjustment.
This makes the valve arm 1.5360" from the centre axis. Now this is how I interpret the pushrod arm axis, to the centre of the ball. And it's length is .8660"
So when I divide 1.5360 x .8660 I get 1.774:1 ratio
What am I doing wrong?

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Forum Post Rocker ratio By CK ( 11 Years Ago )
Forum Post I cannot help with your math but for what it's worth, the 6564 is... By chiggerfarmer ( 11 Years Ago )
Forum Post You can't know precisely how it contacts the valve and pushrod and I... By charliemccraney ( 11 Years Ago )
Forum Post I'm not sure about the math involved either. However, those rockers... By PF Arcand ( 11 Years Ago )
Forum Post I could be way off and this could be a stupid comment, but I always... By Riz ( 11 Years Ago )
Forum Post Riz, you are correct. The position of the adjuster screw does affect... By charliemccraney ( 11 Years Ago )
Forum Post Perhaps it's actually the point of the ball at which the leverage is... By CK ( 11 Years Ago )
Forum Post Here is a picture. 1.54:1 above 1.43:1 below. You can see that the... By lyonroad ( 11 Years Ago )
Forum Post I measured the rocker again, yet this time at the tip of the ball and... By CK ( 11 Years Ago )
Forum Post Hey guys. If you haven't read it you should.... By CK ( 11 Years Ago )
Forum Post Interesting article. One thing did stick out to me. " Also,... By Jimz Bird ( 11 Years Ago )
Forum Post [quote][b]Jimz Bird (8/1/2014)[/b][hr] Interesting article. ... One... By Ted ( 11 Years Ago )
Forum Post Great stuff. That really helps. Thanks Ted. By Jimz Bird ( 11 Years Ago )
Forum Post One thing that occurred to me the other night when it was too hot to... By lyonroad ( 11 Years Ago )
Forum Post [quote][b]lyonroad (8/2/2014)[/b][hr]...Has anyone ever thought of... By charliemccraney ( 11 Years Ago )
Forum Post Thanks Charlie. I was initially thinking that the location of the... By lyonroad ( 11 Years Ago )
Forum Post As a guy who designed and had roller rockers made I feel I need to... By DryLakesRacer ( 11 Years Ago )


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