Bewy said

B3,

The ratio on the valve side is from the centre of the fulcrum to the point of contact of the roller on the valve tip. This does not stay constant, it changes through the lift cycle.

As the point of contact of contact moves outboard, the effective ratio length of the valve end of the is increased. .......as the valve is being returned to the seat ,the point of contact is moving inboard & the effective length of the lever arm is decreasing.'

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Bewy said

B3,
there is the valve side ratio & the p'rod side ratio.

At max lift, the lever arm, & corresponding ratio, is greater than the nominal 1.500" because the lever arm is measured from the point of contact of the roller on the valve tip to the fulcrum centre. It might be 1.520", as an example.

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Bewy said

IQ,
Totally agree with your test. But just as the ratio changes on the p'rod side, it also changes on the valve side because the rocker is in a new starting position when you change the prod length. The ratio is not constant on the prod side...or the valve side.
Smokey said it, & I quoted him because he was & is correct.

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Bewy said

B3,

And so far, the only 'knowing right' that I have claimed is that the there is a p'rod side ratio & a valve side ratio & they change throughout the lift cycle. I have made no other claims other than that.

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