General engine tech -- Drag Racing to Circle Track
I did do what you said and shorten the push rod .100 it still did not get me to wear i wanted plus it made the geometry so far out of wack the rocker was way on the back side of the valve tip.
EQ Cylinder Heads
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Sorry I wasn't in when you called.
I have never tried to figure it that way. (Pushrod Length Vs Ratio)
I can say I have found that when working with 1.75 & 1.8 ratio rockers set @ 1 1/2 turns out the ratio changes approx. .25 for every 1/2 turn on the adjuster. At 24 threads per inch one turn is .04117.
Ths only holds true if you have the stand height correct. Hope this helps.
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