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Clarification on net valve lift calculation in SR20 work example introduction

How to Degree a Cam

Relevant Module: Worked Examples > Nissan SR20 > Introduction

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Hi, I have a question regarding the net valve lift calculation in the SR20 introduction work example at 1:52 in the video, where the camshaft specification sheet is show, and based on the given values cam lift intake 6.83mm, rocker 1.6, valve lash intake 0.20 and using the formula 6.83x1.6=10.93-0.20=10.73mm, and however the spec sheet lists 10.60mm instead. Could you please explain why there is a difference in both intake and exhaust values? Is the spec sheet correct, or is there another factor affecting the final value? Thanks.

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