Rocker ratio cam degreeing

I have questions so my cam card rocker ratio is set at 1.7 my rocker ration is 1.72 do I use my rocker ratio or cam card and what changes do I have to make if I use my rocker ratio

hello Martin, the rocker ratio changes nothing but the lift as far as I can work out in my head, your opening and closing values will be exactly the same

so it will not make any difference to the cam timing whichever rocker you use, but always recommend using the rocker you are going to be running just to save confusion

Regards ross