Look I am as amazed as anybody what a difference it made, I thought I was pretty good before - slip was 14% under 4K and 11% above which are damn good numbers. It went 11% under and 7% to WOT which are unbelieveable - I think I used the correct LU ratio 1.87.
I just re- read your post, you got alot out of 1" pitch 400 RPM - who knows you may have gotton 200, I would have done mine before if I knew - just sharing what I learn, nobody was born knowing this stuff.
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Any way you measure it - dumbass is expensive
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