B3 [ Mike].
Wow! Don't let the facts get in the way of a good story!
Misrepresenting Smokey? Really? A figment of your imagination. I got involved in this post because of your claim that rocker ratio remains constant on the valve side. It does NOT & have said so ever since; & neither does the prod side remain constant.
In post 36, I quoted SY. In my Smokey book the quote is on page 88. I did not not misquote him, it is exactly what he said word for word, & it relates to ratio change, the subject at hand. I find it insulting that you claim I misrepresented a famous icon. So now maybe we are even....
0000s agree with your theory. Yeah well.....
0000s of professionals, at one time, also agreed that the earth was flat....
So the fella that changed from short to long prods, changed the lift, but not the ratio? You say. The effective or working ratio must have changed to change the lift. And how could the lobe lift change [ which you are suggesting ] if all he changed was pushrods?? Common sense, please. The quoted/advertised ratio might only occur at one point in the lift cycle.
I dragged other people into this thread? No, they dragged themselves into it.
And now you are a psychologist as well!!
'If the arc is the same, the ratio is the same'. That is wrong & really surprised you say it. The arc on a roller rocker is the arc described by the movement of the roller centre. That arc is the arc of a circle whose radius is from the fulcrum centre to the roller centre. Say as an example the radius is 1.5". The point of contact of the roller on the valve tip may at one point in the cycle equal the 1.5" radius, but at other points it can & will be more or less than 1.5". This varying distance is what gives you the ratio on the valve side & is NOT constant.
A shoe rocker that has the shoe ground to the same circumference as the roller on a roller rocker, & is identical in other aspects, will behave identically as the roller rocker.
There is no better example of ratio change than to look at high mileage factory rockers, where usage has left a mark on the shoe. It is never a thin line, it is a thick section typically 1/8" wide or wider. That shows the differing contact point during the rocker cycle....& changing ratio.
Mike, I have a suggestion. I see you have an email address. How about I email you some drawings about what I am saying.
